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VS1002D
VS1002D
VS1002D - MP3 AUDIO CODEC
Features
* Decodes MPEG 1.0 & 2.0 audio layer III (CBR + VBR); WAV and PCM files * Encodes ADPCM from microphone input * Streaming support for MP3 and WAV * Bass control * Operates with single a clock 12..13 MHz or 24..26 MHz. * Internal clock doubler * Low-power operation * High-quality on-chip stereo DAC with no phase error between channels * Stereo earphone driver capable of driving a 30 load * Separate 2.5 V..3.6 V operating voltages for analog and digital * 7.5 KiB On-chip RAM for user code / data * Serial control and data interfaces * Can be used as a slave co-processor * SPI flash boot for special applications * UART for debugging purposes * New functions may be added with software and 4 GPIO pins * Lead-free RoHS-compliant packages
Description
VS1002D is a single-chip MP3 audio decoder. It contains a high-performance, low-power DSP processor core VS DSP4 , working data memory, 5 KiB instruction RAM and 2.5 KiB data RAM for user applications, serial control and input data interfaces, 4 general purpose I/O pins, an UART, as well as a high-quality variable-sample-rate mono ADC and stereo DAC, followed by an earphone amplifier and a ground buffer. VS1002D receives its input bitstream through a serial input bus, which it listens to as a system slave. The input stream is decoded and passed through a digital volume control to an 18-bit oversampling, multi-bit, sigma-delta DAC. The decoding is controlled via a serial control bus. In addition to the basic decoding, it is possible to add application specific features, like DSP effects, to the user RAM memory.
audio
VS1002
MIC AMP 4 GPIO
Mono ADC
Stereo DAC
Stereo Ear- phone Driver
audio L R output
GPIO
X ROM DREQ SO SI SCLK XCS XDCS Serial Data/ Control Interface X RAM
VSDSP
4
Y ROM
RX TX UART Y RAM
Instruction RAM
Instruction ROM
Version 1.0,
2005-04-27
1
VLSI
Solution
y
VS1002D
VS1002D
CONTENTS
Contents
1 License 9
2
Disclaimer
9
3
Definitions
9
4
Characteristics & Specifications 4.1 4.2 4.3 4.4 4.5 4.6 Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Recommended Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . Analog Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Digital Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Switching Characteristics - Boot Initialization . . . . . . . . . . . . . . . . . . . . . . .
10 10 10 11 11 12 12
5
Packages and Pin Descriptions 5.1 Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1.1 5.1.2 5.2 LQFP-48 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BGA-49 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13 13 13 13 14
LQFP-48 and BGA-49 Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . .
6
Connection Diagram, LQFP-48
15
7
SPI Buses 7.1 7.2 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SPI Bus Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.2.1 VS1002 Native Modes (New Mode) . . . . . . . . . . . . . . . . . . . . . . . .
16 16 16 16
Version 1.0,
2005-04-27
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VLSI
Solution
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VS1002D
7.2.2
VS1002D
CONTENTS
VS1001 Compatibility Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16 17 17 17 17 18 18 18 19 19 20 21 21 21 21
7.3 7.4
Data Request Pin DREQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Serial Protocol for Serial Data Interface (SDI) . . . . . . . . . . . . . . . . . . . . . . . 7.4.1 7.4.2 7.4.3 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SDI in VS1002 Native Modes (New Mode) . . . . . . . . . . . . . . . . . . . . SDI in VS1001 Compatibility Mode . . . . . . . . . . . . . . . . . . . . . . . .
7.5
Serial Protocol for Serial Command Interface (SCI) . . . . . . . . . . . . . . . . . . . . 7.5.1 7.5.2 7.5.3 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCI Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCI Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
7.6 7.7
SPI Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SPI Examples with SM SDINEW and SM SDISHARED set . . . . . . . . . . . . . . . 7.7.1 7.7.2 7.7.3 Two SCI Writes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Two SDI Bytes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCI Operation in Middle of Two SDI Bytes . . . . . . . . . . . . . . . . . . . .
8
Functional Description 8.1 8.2 Main Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Supported Audio Codecs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.2.1 8.2.2 8.3 8.4 8.5 8.6 Supported MP3 (MPEG layer III) Formats . . . . . . . . . . . . . . . . . . . . Supported RIFF WAV Formats . . . . . . . . . . . . . . . . . . . . . . . . . . .
22 22 22 22 23 23 24 25 25
Data Flow of VS1002D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Serial Data Interface (SDI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Serial Control Interface (SCI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCI Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Version 1.0,
2005-04-27
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VLSI
Solution
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VS1002D
8.6.1 8.6.2 8.6.3 8.6.4 8.6.5 8.6.6 8.6.7 8.6.8 8.6.9
VS1002D
CONTENTS
SCI MODE (RW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCI STATUS (RW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCI BASS (RW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCI CLOCKF (RW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCI DECODE TIME (RW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCI AUDATA (RW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCI WRAM (RW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCI WRAMADDR (RW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCI HDAT0 and SCI HDAT1 (R) . . . . . . . . . . . . . . . . . . . . . . . . .
26 28 28 28 29 29 29 30 30 32 32 32
8.6.10 SCI AIADDR (RW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.6.11 SCI VOL (RW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8.6.12 SCI AICTRL[x] (RW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9
Operation 9.1 9.2 9.3 9.4 9.5 9.6 9.7 Clocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Hardware Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Software Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SPI Boot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Play/Decode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Feeding PCM data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SDI Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9.7.1 9.7.2 9.7.3 9.7.4 Sine Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pin Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Memory Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCI Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
33 33 33 33 34 34 34 35 35 35 36 36
Version 1.0,
2005-04-27
4
VLSI
Solution
y
VS1002D
VS1002D
CONTENTS
10 VS1002D Registers 10.1 Who Needs to Read This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.2 The Processor Core . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.3 VS1002D Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.4 SCI Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.5 Serial Data Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.6 DAC Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.7 GPIO Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.8 Interrupt Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.9 A/D Modulator Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.10Watchdog v1.0 2002-08-26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.10.1 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.11UART v1.0 2002-04-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.11.1 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.11.2 Status UARTx STATUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.11.3 Data UARTx DATA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.11.4 Data High UARTx DATAH . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.11.5 Divider UARTx DIV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.11.6 Interrupts and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.12Timers v1.0 2002-04-23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.12.1 Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.12.2 Configuration TIMER CONFIG . . . . . . . . . . . . . . . . . . . . . . . . . . 10.12.3 Configuration TIMER ENABLE . . . . . . . . . . . . . . . . . . . . . . . . . . 10.12.4 Timer X Startvalue TIMER Tx[L/H] . . . . . . . . . . . . . . . . . . . . . . .
37 37 37 37 37 38 39 39 40 41 42 42 43 43 43 44 44 44 45 46 46 46 47 47
Version 1.0,
2005-04-27
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VLSI
Solution
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VS1002D
VS1002D
CONTENTS
10.12.5 Timer X Counter TIMER TxCNT[L/H] . . . . . . . . . . . . . . . . . . . . . . 10.12.6 Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.13System Vector Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.13.1 AudioInt, 0x20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.13.2 SciInt, 0x21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.13.3 DataInt, 0x22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.13.4 ModuInt, 0x23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.13.5 TxInt, 0x24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.13.6 RxInt, 0x25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.13.7 Timer0Int, 0x26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.13.8 Timer1Int, 0x27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.13.9 UserCodec, 0x0 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.14System Vector Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.14.1 WriteIRam(), 0x2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.14.2 ReadIRam(), 0x4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.14.3 DataBytes(), 0x6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.14.4 GetDataByte(), 0x8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.14.5 GetDataWords(), 0xa . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.14.6 Reboot(), 0xc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
47 47 48 48 48 48 48 49 49 49 49 50 50 50 50 51 51 51 51
11 VS1002 Version Changes 11.1 Changes Between VS1002c and VS1002D, 2004-05-13 . . . . . . . . . . . . . . . . . .
52 52
12 Document Version Changes 12.1 Version 1.0 for VS1002D, 2005-04-27 . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.2 Version 0.71 for VS1002D, 2004-07-20 . . . . . . . . . . . . . . . . . . . . . . . . . . .
53 53 53
Version 1.0,
2005-04-27
6
VLSI
Solution
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VS1002D
VS1002D
CONTENTS
12.3 Version 0.70 for VS1002D, 2004-05-13 . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.4 Version 0.62 for VS1002c, 2004-03-24 . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.5 Version 0.61 for VS1002c, 2004-03-11 . . . . . . . . . . . . . . . . . . . . . . . . . . . 12.6 Version 0.6 for VS1002c, 2004-02-13 . . . . . . . . . . . . . . . . . . . . . . . . . . .
53 53 53 53
13 Contact Information
54
Version 1.0,
2005-04-27
7
VLSI
Solution
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VS1002D
VS1002D
LIST OF FIGURES
List of Figures
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Pin Configuration, LQFP-48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pin Configuration, BGA-49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Typical Connection Diagram Using LQFP-48. . . . . . . . . . . . . . . . . . . . . . . . BSYNC Signal - one byte transfer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BSYNC Signal - two byte transfer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCI Word Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SCI Word Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SPI Timing Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Two SCI Operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Two SDI Bytes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Two SDI Bytes Separated By an SCI Operation. . . . . . . . . . . . . . . . . . . . . . . Data Flow of VS1002D. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ADPCM Frequency Responses. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . User's Memory Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . RS232 Serial Interface Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 13 15 18 18 19 19 20 21 21 21 23 27 38 43
Version 1.0,
2005-04-27
8
VLSI
Solution
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VS1002D
VS1002D
1. LICENSE
1
License
MPEG Layer-3 audio decoding technology licensed from Fraunhofer IIS and Thomson.
2
Disclaimer
This is a preliminary datasheet. All properties and figures are subject to change.
3
Definitions
ASIC Application Specific Integrated Circuit. B Byte, 8 bits. b Bit. IC Integrated Circuit. Ki "Kibi" = 210 = 1024 (IEC 60027-2). Mi "Mebi" = 220 = 1048576 (IEC 60027-2). VS DSP VLSI Solution's DSP core. W Word. In VS DSP, instruction words are 32-bit and data words are 16-bit wide.
Version 1.0,
2005-04-27
9
VLSI
Solution
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VS1002D4. CHARACTERISTICS & SPECIFICATIONS
VS1002D
4
4.1
Characteristics & Specifications
Absolute Maximum Ratings
Symbol AVDD DVDD Min -0.3 -0.3 -0.3 -40 -65 Max 3.6 3.6 50 DVDD+0.31 +85 +150 Unit V V mA V C C
Parameter Analog Positive Supply Digital Positive Supply Current at Any Digital Output Voltage at Any Digital Input 2 Operating Temperature Storage Temperature
1 2
Must not exceed 3.6 V Current must be limited to 50 mA
4.2 Recommended Operating Conditions
Parameter Ambient Operating Temperature Analog and Digital Ground 1 Positive Analog Positive Digital Input Clock Frequency Input Clock Frequency, with clock doubler Internal Clock Frequency Internal Clock Frequency, DVDD>= 2.7V Master Clock Duty Cycle
1 2
Symbol AGND DGND AVDD DVDD XTALI XTALI CLKI CLKI
Min -40 2.5 2.3 24 12 242 242 40
Typ 0.0 2.7 2.7 24.576 12.288 24.576 50
Max +85 3.6 3.6 26 13 26 28.636 60
Unit C V V V MHz MHz MHz MHz %
Must be connected together as close to the device as possible for latch-up immunity. The maximum sample rate that can be played with correct speed is CLKI/512. Thus, if CLKI is 24 MHz, 48 kHz is played 2.5% off-pitch.
Version 1.0,
2005-04-27
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VLSI
Solution
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VS1002D4. CHARACTERISTICS & SPECIFICATIONS
VS1002D
4.3
Analog Characteristics
Unless otherwise noted: AVDD=2.5..3.6V, DVDD=2.3..3.6V, TA=-40..+85 C, XTALI=12..13MHz, internal Clock Doubler active. DAC tested with 1307.894 Hz full-scale output sinewave, measurement bandwidth 20..20000 Hz, analog output load: LEFT to GBUF 30, RIGHT to GBUF 30. Microphone test amplitude 100 mVpp, f=1 kHz. Parameter DAC Resolution Total Harmonic Distortion Dynamic Range (DAC unmuted, A-weighted) S/N Ratio (full scale signal) Interchannel Isolation (Cross Talk), AC-coupled Interchannel Isolation (Cross Talk), with GBUF Interchannel Gain Mismatch Frequency Response 20 Hz..15000 Hz Frequency Response 15000 Hz..19000 Hz Full Scale Output Voltage (Peak-to-peak) Deviation from Linear Phase Analog Output Load Resistance Analog Output Load Capacitance Microphone input impedance Microphone input amplitude Microphone Total Harmonic Distortion Microphone S/N Ratio
1 2
Symbol THD IDR SNR
Min
70 50 -0.5 -0.2 -1.0 1.4
Typ 18 0.1 90 85 75 40
Max 0.2
1.61 302
0.5 0.2 -0.2 2.0 5 100
Unit bits % dB dB dB dB dB dB dB Vpp
AOLR
16
MTHD MSNR
70
100 1003 0.03 82
280 0.10
pF k mVpp AC % dB
3.2 volts can be achieved with +-to-+ wiring for mono difference sound. AOLR may be much lower, but below Typical distortion performance may be compromised. 3 100 mVpp is optimum level. Above typical amplitude the Harmonic Distortion increases.
4.4 Power Consumption
Average current tested with an MPEG 1.0 Layer III 128 kbit/s sample and generated sine, output at full volume, XTALI = 12.288 MHz, internal clock doubler enabled, DVDD = 2.7 V, AVDD = 2.7 V. Parameter Power Supply Consumption AVDD, Reset Power Supply Consumption DVDD, Reset Power Supply Consumption AVDD, sine test, 30 + GBUF Power Supply Consumption DVDD, sine test Power Supply Consumption AVDD, no load Power Supply Consumption AVDD, output load 30 Power Supply Consumption AVDD, 30 + GBUF Power Supply Consumption DVDD Min Typ 0.6 3.7 22 9 6 10 16 19 Max 5.0 10.0 30 18 Unit A A mA mA mA mA mA mA
Version 1.0,
2005-04-27
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VLSI
Solution
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VS1002D4. CHARACTERISTICS & SPECIFICATIONS
VS1002D
4.5
Digital Characteristics
Symbol Min 0.7xDVDD -0.2 0.7xDVDD -1.0 Typ Max DVDD+0.31 0.3xDVDD 0.3xDVDD 1.0
CLKI 6
Parameter High-Level Input Voltage Low-Level Input Voltage High-Level Output Voltage at IO = -2.0 mA Low-Level Output Voltage at IO = 2.0 mA Input Leakage Current SPI Input Clock Frequency 2 Rise time of all output pins, load = 50 pF
1 2
50
CLKI 4.
Unit V V V V A MHz ns
Must not exceed 3.6V Value for SCI reads. SCI and SDI writes allow
4.6 Switching Characteristics - Boot Initialization
Parameter XRESET active time XRESET inactive to software ready Power on reset, rise time of DVDD
1
Symbol
Min 2 10
Max 500001
Unit XTALI XTALI V/s
DREQ rises when initialization is complete. You should not send any data or commands before that.
Version 1.0,
2005-04-27
12
VLSI
Solution
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VS1002D
VS1002D
5. PACKAGES AND PIN DESCRIPTIONS
5
5.1
Packages and Pin Descriptions
Packages
Both LPQFP-48 and BGA-49 are lead (Pb) free and also RoHS compliant packages. RoHS is a short name of Directive 2002/95/EC on the restriction of the use of certain hazardous substances in electrical and electronic equipment. 5.1.1 LQFP-48
48
1
Figure 1: Pin Configuration, LQFP-48. LQFP-48 package dimensions are at http://www.vlsi.fi/ .
5.1.2
BGA-49
A1 BALL PAD CORNER 1 2 3 4 5 6 7
A B
4.80 7.00
C D E F G
0.80 TYP
0.80 TYP 4.80 7.00
1.10 REF
TOP VIEW
Figure 2: Pin Configuration, BGA-49. BGA-49 package dimensions are at http://www.vlsi.fi/ .
1.10 REF
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VS1002D
VS1002D
5. PACKAGES AND PIN DESCRIPTIONS
5.2
LQFP-48 and BGA-49 Pin Descriptions
LQFP48 Pin 1 2 3 4 6 8 9 10 13 14 16 17 18 19 20 21 22 23 26 27 28 29 30 32 33 34 37 38 39 40 41 42 43 44 45 46 47 BGA49 Ball C3 C2 B1 D2 D3 E2 E1 F2 E3 F3 F4 G3 E4 F5 F6 F6 F6 G6 E6 F7 D6 E7 D5 C6 C7 B6 C5 B5 A6 B4 A5 C4 A4 B3 A3 B2 A2 Pin Type AI AI DI PWR PWR DO DI DI DI PWR PWR AO AI PWR PWR PWR PWR DI DI DO DI DI DO3 DI DIO DIO PWR PWR AO PWR PWR AO PWR AIO PWR AO PWR Function microphone input, use pull-down resistor if not used microphone input, use pull-down resistor if not used active low asynchronous reset digital ground digital power supply data request output general purpose IO 2 / serial input data bus clock, use pull-down resistor if not used general purpose IO 3 / serial data input, use pull-down resistor if not used data chip select / byte sync digital power supply digital ground crystal output crystal input digital power supply digital ground (in BGA-49, DGND2, 3, 4 conn. together) digital ground digital ground chip select input (active low) UART receive, use pull-up resistor if not used UART transmit clock for serial bus serial input serial output reserved for test, connect to DVDD general purpose IO 0, use 100 k pull-down resistor general purpose IO 1, use pull-down resistor if not used analog ground, low-noise reference analog power supply right channel output analog ground analog ground virtual ground for audio output, 1.23 V nominal analog power supply filtering capacitance for reference analog power supply left channel output analog ground
Pin Name MICP2 MICN2 XRESET DGND0 DVDD0 DREQ GPIO22 / DCLK1 GPIO32 / SDATA1 XDCS / BSYNC1 DVDD1 DGND1 XTALO XTALI DVDD2 DGND2 DGND3 DGND4 XCS RX TX SCLK SI SO TEST SPIBOOT / GPIO03 GPIO12 AGND0 AVDD0 RIGHT AGND1 AGND2 GBUF AVDD1 RCAP AVDD2 LEFT AGND3
1 2 3
First pin function is active in New Mode, latter in Compatibility Mode. If not used, use 100 k pull-down resistor. Unless pull-down resistor is used, SPI Boot is tried. See Chapter 9.4 for details. Type DI DO DIO DO3 Description Digital input, CMOS Input Pad Digital output, CMOS Input Pad Digital input/output Digital output, CMOS Tri-stated Output Pad Type AI AO AIO PWR Description Analog input Analog output Analog input/output Power supply pin
In BGA-49, no-connect balls are A1, A7, B7, C1, D1, D4, D7, E5, F1, G1, G2, G7. In LQFP-48, no-connect pins are 5, 7, 11, 12, 15, 24, 25, 31, 35, 36, 48.
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VS1002D
VS1002D
6. CONNECTION DIAGRAM, LQFP-48
6
Connection Diagram, LQFP-48
Figure 3: Typical Connection Diagram Using LQFP-48. The ground buffer GBUF can be used for common voltage (1.23 V) for earphones. This will eliminate the need for large isolation capacitors on line outputs, and thus the audio output pins from VS1002D may be connected directly to the earphone connector. If GBUF is not used, LEFT and RIGHT must be provided with 1-100 F capacitors depending load resistance. If UART is not used, RX should connect to DVDD and TX be unconnected. Note: This connection assumes SM SDINEW is active (see Chapter 8.6.1). If also SM SDISHARE is used, xDCS should have a pull-up resistor (see Chapter 7.2.1).
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VS1002D
VS1002D
7. SPI BUSES
7
7.1
SPI Buses
General
The SPI Bus - that was originally used in some Motorola devices - has been used for both VS1002D's Serial Data Interface SDI (Chapters 7.4 and 8.4) and Serial Control Interface SCI (Chapters 7.5 and 8.5).
7.2
7.2.1
SPI Bus Pin Descriptions
VS1002 Native Modes (New Mode)
These modes are active when SM SDINEW is set to 1 (default at startup). DCLK, SDATA and BSYNC are replaced with GPIO2, GPIO3 and XDCS, respectively. SDI Pin XDCS SCI Pin XCS Description Active low chip select input. A high level forces the serial interface into standby mode, ending the current operation. A high level also forces serial output (SO) to high impedance state. If SM SDISHARE is 1, pin XDCS is not used, but the signal is generated internally by inverting XCS. Serial clock input. The serial clock is also used internally as the master clock for the register interface. SCK can be gated or continuous. In either case, the first rising clock edge after XCS has gone low marks the first bit to be written. Serial input. If a chip select is active, SI is sampled on the rising CLK edge. Serial output. In reads, data is shifted out on the falling SCK edge. In writes SO is at a high impedance state.
SCK
SI SO
7.2.2
VS1001 Compatibility Mode
This mode is active when SM SDINEW is set to 0. In this mode, DCLK, SDATA and BSYNC are active. SDI Pin SCI Pin XCS Description Active low chip select input. A high level forces the serial interface into standby mode, ending the current operation. A high level also forces serial output (SO) to high impedance state. There is no chip select for SDI, which is always active. SDI data is synchronized with a rising edge of BSYNC. Serial clock input. The serial clock is also used internally as the master clock for the register interface. SCK can be gated or continuous. In either case, the first rising clock edge after XCS has gone low marks the first bit to be written. Serial input. SI is sampled on the rising SCK edge, if XCS is low. Serial output. In reads, data is shifted out on the falling SCK edge. In writes SO is at a high impedance state.
BSYNC DCLK
SCK
SDATA -
SI SO
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VS1002D
VS1002D
7. SPI BUSES
7.3
Data Request Pin DREQ
The DREQ pin/signal is used to signal if VS1002D's FIFO is capable of receiving data. If DREQ is high, VS1002D can take at least 32 bytes of SDI data or one SCI command. When these criteria are not met, DREQ is turned low, and the sender should stop transferring new data. Because of the 32-byte safety area, the sender may send upto 32 bytes of SDI data at a time without checking the status of DREQ, making controlling VS1002D easier for low-speed microcontrollers. Note: DREQ may turn low or high at any time, even during a byte transmission. Thus, DREQ should only be used to decide whether to send more bytes. It should not abort a transmission that has already started.
7.4
7.4.1
Serial Protocol for Serial Data Interface (SDI)
General
The serial data interface operates in slave mode so the DCLK signal must be generated by an external circuit. Data (SDATA signal) can be clocked in at either the rising or falling edge of DCLK (Chapter 8.6). VS1002D assumes its data input to be byte-sychronized. SDI bytes may be transmitted either MSb or LSb first, depending of contents of SCI MODE (Chapter 8.6.1). The firmware is able to accept the maximum bitrate the SDI supports.
7.4.2
SDI in VS1002 Native Modes (New Mode)
In VS1002 native modes, byte synchronization is achieved by XDCS (or XCS if SM SDISHARE is 1). The state of XDCS (or XCS) may not change while a data byte transfer is in progress. To always maintain data synchronization even if there may be glitches in the boards using VS1002D, it is recommended to turn XDCS (or XCS) every now and then, for instance once after every flash data block or a few kilobytes, just to keep sure the host and VS1002D are in sync. If SM SDISHARE is 1, the XDCS signal is internally generated by inverting the XCS input. For new designs, using VS1002 native modes are recommended.
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VS1002D
SDI in VS1001 Compatibility Mode
BSYNC
VS1002D
7. SPI BUSES
7.4.3
SDATA
D7
D6
D5
D4
D3
D2
D1
D0
DCLK
Figure 4: BSYNC Signal - one byte transfer. When VS1002D is running in VS1001 compatibility mode, a BSYNC signal must be generated to ensure correct bit-alignment of the input bitstream. The first DCLK sampling edge (rising or falling, depending on selected polarity), during which the BSYNC is high, marks the first bit of a byte (LSB, if LSB-first order is used, MSB, if MSB-first order is used). If BSYNC is '1' when the last bit is received, the receiver stays active and next 8 bits are also received.
BSYNC
SDATA
D7
D6
D5
D4
D3
D2
D1
D0
D7
D6
D5
D4
D3
D2
D1
D0
DCLK
Figure 5: BSYNC Signal - two byte transfer.
7.5 Serial Protocol for Serial Command Interface (SCI)
7.5.1 General
The serial bus protocol for the Serial Command Interface SCI (Chapter 8.5) consists of an instruction byte, address byte and one 16-bit data word. Each read or write operation can read or write a single register. Data bits are read at the rising edge, so the user should update data at the falling edge. Bytes are always send MSb firrst. The operation is specified by an 8-bit instruction opcode. The supported instructions are read and write. See table below. Instruction Opcode 0b0000 0011 0b0000 0010
Name READ WRITE
Operation Read data Write data
Note: After sending an SCI command, it is not allowed to send SCI or SDI data for 5 microseconds.
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VS1002D
SCI Read
VS1002D
7. SPI BUSES
7.5.2
VS1002D registers are read by the following sequence, as shown in Figure 6. First, XCS line is pulled low to select the device. Then the READ opcode (0x3) is transmitted via the SI line followed by an 8-bit word address. After the address has been read in, any further data on SI is ignored. The 16-bit data corresponding to the received address will be shifted out onto the SO line. XCS should be driven high after data has been shifted out.
XCS 0 SCK 3 SI 0 0 0 0 0 0 1 1 0 0 0 0 address 15 14 SO 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 1 0 don't care data out 1 0 X don't care 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 30 31
instruction (read)
Figure 6: SCI Word Read
7.5.3
SCI Write
VS1002D registers are written to using the following sequence, as shown in Figure 7. First, XCS line is pulled low to select the device. Then the WRITE opcode (0x2) is transmitted via the SI line followed by an 8-bit word address. After the word has been shifted in and the last clock has been sent, XCS should be pulled high to end the WRITE sequence.
XCS 0 SCK 3 SI 0 0 0 0 0 0 1 0 0 0 0 0 address 0 0 0 0 0 0 0 0 0 0 0 0 data out 0 0X 2 1 0 15 14 1 0 X 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 30 31
instruction (write) SO 0 0 0 0 0 0
Figure 7: SCI Word Write
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VS1002D
VS1002D
7. SPI BUSES
7.6
SPI Timing Diagram
tXCSS tWL tWH tXCSH
XCS 0 SCK 1 14 15 16 30 31 tXCS
SI tH tSU SO tZ tV tDIS
Figure 8: SPI Timing Diagram. Symbol tXCSS tSU tH tZ tWL tWH tV tXCSH tXCS tDIS
1
Min 5 -26 2 0 2 2 -26 2
Max
2 (+ 25ns1 )
10
Unit ns ns XTALI cycles ns XTALI cycles XTALI cycles XTALI cycles ns XTALI cycles ns
25ns is when pin loaded with 100pF capacitance. The time is shorter with lower capacitance.
Note: As tWL and tWH, as well as tH require at least 2 clock cycles, the maximum speed for the SPI bus that can easily be used is 1/6 of VS1011's external clock speed XTALI. Slightly higher speed can be achieved with very careful timing tuning. For details, see Application Notes for VS10XX. Note: Negative numbers mean that the signal can change in different order from what is shown in the diagram.
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VS1002D
VS1002D
7. SPI BUSES
7.7
7.7.1
SPI Examples with SM SDINEW and SM SDISHARED set
Two SCI Writes
SCI Write 1 SCI Write 2
XCS 0 SCK 1 SI 0 0 0 0 0 X 0 0 2 1 0 X 1 2 3 30 31 32 33 61 62 63
Figure 9: Two SCI Operations. Figure 9 shows two consecutive SCI operations. Note that xCS must be raised to inactive state between the writes. 7.7.2 Two SDI Bytes
SDI Byte 1 SDI Byte 2
XCS 0 SCK 7 SI 6 5 4 3 1 0 7 6 5 2 1 0 X 1 2 3 6 7 8 9 13 14 15
Figure 10: Two SDI Bytes. SDI data is synchronized with a raising edge of xCS as shown in Figure 10. However, every byte doesn't need separate synchronization. 7.7.3 SCI Operation in Middle of Two SDI Bytes
SDI Byte SCI Operation SDI Byte
XCS 0 SCK 1 6 7 8 9 38 39 40 41 46 47
7 SI
6
5
1
0 0 0
1
0
7
6
5
1
0 X
Figure 11: Two SDI Bytes Separated By an SCI Operation. Figure 11 shows how an SCI operation is embedded in between SDI operations. The changes in xCS are used to synchronize both SDI and SCI.
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VS1002D
VS1002D
8. FUNCTIONAL DESCRIPTION
8
8.1
Functional Description
Main Features
VS1002D is based on a proprietary digital signal processor, VS DSP. It contains all the code and data memory needed for MP3 and WAV PCM + ADPCM audio decoding, together with serial interfaces, a multirate stereo audio DAC and analog output amplifiers and filters. Also ADPCM audio encoding is supported using a microphone amplifier and A/D converter. A UART is provided for debugging purposes. VS1002D can play all MPEG 1.0 and 2.0 layer III files, with all sample rates and bitrates, including variable bitrate (VBR).
8.2 Supported Audio Codecs
Conventions Description Format is supported Format exists but is not supported Format doesn't exist
Mark + -
8.2.1
Supported MP3 (MPEG layer III) Formats
MPEG 1.01 :
Samplerate / Hz 48000 44100 32000 32 + + + 40 + + + 48 + + + 56 + + + 64 + + + 80 + + + Bitrate / kbit/s 96 112 128 + + + + + + + + + 160 + + + 192 + + + 224 + + + 256 +3 + + 320 +3 +3 +
MPEG 2.01 :
Samplerate / Hz 24000 22050 16000 8 + + + 16 + + + 24 + + + 32 + + + 40 + + + 48 + + + Bitrate / kbit/s 56 64 80 + + + + + + + + + 96 + + + 112 + + + 128 + + + 144 + + + 160 + + +
MPEG 2.51 2 :
Samplerate / Hz 12000 11025 8000
1 2
8 + + +
16 + + +
24 + + +
32 + + +
40 + + +
48 + + +
Bitrate / kbit/s 56 64 80 + + + + + + + + +
96 + + +
112 + + +
128 + + +
144 + + +
160 + + +
Also all variable bitrate (VBR) formats are supported. Incompatibilities may occur because MPEG 2.5 is not a standard format. 3 Nominal CLKI=24.576 MHz may be too little for glitchless playback.
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VS1002D
Supported RIFF WAV Formats
VS1002D
8. FUNCTIONAL DESCRIPTION
8.2.2
The most common RIFF WAV subformats are supported.
Format 0x01 0x02 0x03 0x06 0x07 0x10 0x11 0x15 0x16 0x30 0x31 0x3b 0x3c 0x40 0x41 0x50 0x55 0x64 0x65 Name PCM ADPCM IEEE FLOAT ALAW MULAW OKI ADPCM IMA ADPCM DIGISTD DIGIFIX DOLBY AC2 GSM610 ROCKWELL ADPCM ROCKWELL DIGITALK G721 ADPCM G728 CELP MPEG MPEGLAYER3 G726 ADPCM G722 ADPCM Supported + + + Comments 16 and 8 bits, any sample rate 48kHz
Any sample rate 48kHz, mono only
For supported MP3 modes, see Chapter 8.2.1
8.3
Data Flow of VS1002D
SCI_BASS = 0
SDI
A1ADDR = 0 L S.rate.conv. and DAC R
Bitstream FIFO 16384 bits
MP3/PlusV/ WAV/ADPCM decoding
Bass enhancer SCI_BASS != 0
User application A1ADDR != 0
Volume control SCI_VOL
Audio FIFO 512 stereo samples
SM_ADPCM=0
Figure 12: Data Flow of VS1002D. First, depending on the audio data, and provided ADPCM encoding mode is not set, MP3, PCM WAV or mono IMA ADPCM WAV data is received and decoded from the SDI bus. After decoding, data may be sent to the Bass Enhancer depending on SCI BASS. Then, if SCI AIADDR is non-zero, application code is executed from the address pointed to by that register. For more details, see Application Notes for VS10XX. After the optional user application, the signal is fed to the volume control unit, which also copies the data to the Audio FIFO. The Audio FIFO holds the data, which is read by the Audio interrupt (Chapter 10.13.1) and fed to the sample rate converter and DACs. The size of the audio FIFO is 512 stereo (2x16-bit) samples. The sample rate converter converts all different sample rates to CLKI/512 and feeds the data to the DAC,
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VS1002D
VS1002D
8. FUNCTIONAL DESCRIPTION
which in order creates a stereo in-phase analog signal. This signal is then forwarded to the earphone amplifier.
8.4
Serial Data Interface (SDI)
The serial data interface is meant for transferring compressed MP3 audio data as well as WAV PCM and ADPCM data. If the input of the decoder is invalid or it is not received fast enough, analog outputs are automatically muted. Also several different tests may be activated through SDI as described in Chapter 9.
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VS1002D
VS1002D
8. FUNCTIONAL DESCRIPTION
8.5
Serial Control Interface (SCI)
The serial control interface is compatible with the SPI bus specification. Data transfers are always 16 bits. VS1002D is controlled by writing and reading the registers of the interface. The main controls of the control interface are:
* * * * *
control of the operation mode uploading user programs access to header data status information access to encoded digital data
8.6
SCI Registers
SCI registers, prefix SCI , offset 0xC000 Abbrev[bits] Description MODE Mode control. STATUS Status of VS1002D. BASS Built-in bass enhancer. CLOCKF Clock freq + doubler. DECODE TIME Decode time in seconds. AUDATA Misc. audio data. WRAM RAM write. WRAMADDR Base address for RAM write. HDAT0 Stream header data 0. HDAT1 Stream header data 1. AIADDR Start address of application. VOL Volume control. AICTRL0 Application control register 0. AICTRL1 Application control register 1. AICTRL2 Application control register 2. AICTRL3 Application control register 3.
Reg 0x0 0x1 0x2 0x3 0x4 0x5 0x6 0x7 0x8 0x9 0xA 0xB 0xC 0xD 0xE 0xF
1
Type rw rw rw rw r rw rw rw r r rw rw rw rw rw rw
Reset 0x800 0x2C1 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Firmware changes the value of this register immediately to 0x28, and in less than 100 ms to 0x20.
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VS1002D
SCI MODE (RW)
VS1002D
8. FUNCTIONAL DESCRIPTION
8.6.1
SCI MODE is used to control operation of VS1002D. Note that this register is not reset to 0, but to 0x0800 (i.e. SM SDINEW is set). Bit 0 1 2 3 4 5 6 7 8 9 10 11 12 13 Name SM DIFF SM SETTOZERO SM RESET SM OUTOFWAV SM PDOWN SM TESTS SM STREAM SM PLUSV SM DACT SM SDIORD SM SDISHARE SM SDINEW SM ADPCM SM ADPCM HP Function Differential Set to zero Soft reset Jump out of WAV decoding Powerdown Allow SDI tests Stream mode MP3+V active DCLK active edge SDI bit order Share SPI chip select VS1002 native SPI modes ADPCM recording active ADPCM high-pass filter active Value 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 Description normal in-phase audio left channel inverted right wrong no reset reset no yes power on powerdown not allowed allowed no yes no yes rising falling MSb first MSb last no yes no yes no yes no yes
When SM DIFF is set, the player inverts the left channel output. For a stereo input this creates a virtual surround, and for a mono input this effectively creates a differential left/right signal. By setting SM RESET to 1, the player is software reset. This bit clears automatically. When the user decoding a WAV file wants to get out of the file without playing it to the end, set SM OUTOFWAV, and send zeros to VS1002D until SM OUTOFWAV is again zero. If the user doesn't want to check SM OUTOFWAV, send 128 zeros. Bit SM PDOWN sets VS1002D into software powerdown mode. During powerdown, no audio is played and no SDI operations are performed. For best results, set SCI VOL to 0xFFFF before activating software powerdown. Note that software powerdown is not nearly as power efficient as hardware powerdown activated with the XRESET pin.
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VS1002D
VS1002D
8. FUNCTIONAL DESCRIPTION
If SM TESTS is set, SDI tests are allowed. For more details on SDI tests, look at Chapter 9.7. SM STREAM activates VS1002D's stream mode. In this mode, data should be sent with as even intervals as possible (and preferable with data blocks of less than 512 bytes), and VS1002D makes every attempt to keep its input buffer half full by changing its playback speed upto 5%. For best quality sound, the average speed error should be within 0.5%, the bitrate should not exceed 160 kbit/s and VBR should not be used. For details, see Application Notes for VS10XX. SM PLUSV activates MP3+V decoding. Without this bit set, only MP3 decoding is performed even for files with additional PlusV data. SM DACT defines the active edge of data clock for SDI. If clear data is read at the rising edge, and if set data is read at the falling edge. When SM SDIORD is clear, bytes on SDI are sent as a default MSb first. By setting SM SDIORD, the user may reverse the bit order for SDI, i.e. bit 0 is received first and bit 7 last. Bytes are, however, still sent in the default order. This register bit has no effect on the SCI bus. Setting SM SDISHARE makes SCI and SDI share the same chip select, as explained in Chapter 7.2, if also SM SDINEW is set. Setting SM SDINEW will activate VS1002 native serial modes as described in Chapters 7.2.1 and 7.4.2. Note, that this bit is set as a default when VS1002D is started up. By activating SM ADPCM and SM RESET at the same time, the user will activate IMA ADPCM recording mode. More information is available in document Application Notes for VS10XX. If SM ADPCM HP is set at the same time as SM ADPCM and SM RESET, ADPCM mode will start with a high-pass filter. This may help intelligibility of speech when there is lots of background noise. The difference created to the ADPCM encoder frequency response is as shown in Figure 13.
VS1002 AD Converter with and Without HP Filter 5 No High-Pass High-Pass
0
Amplitude / dB
-5
-10
-15
-20
0
500
1000
1500
2000 2500 Frequency / Hz
3000
3500
4000
Figure 13: ADPCM Frequency Responses.
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VS1002D
SCI STATUS (RW)
VS1002D
8. FUNCTIONAL DESCRIPTION
8.6.2
SCI STATUS contains information on the current status of VS1002D and lets the user shutdown the chip without audio glitches. Name SS VER SS APDOWN2 SS APDOWN1 SS AVOL Bits 6..4 3 2 1..0 Description Version Analog driver powerdown Analog internal powerdown Analog volume control
SS VER is 0 for VS1001, 1 for VS1011, 2 for VS1002 and 3 for vs1003. SS APDOWN2 controls analog driver powerdown. Normally this bit is controlled by the system firmware. However, if the user wants to powerdown VS1002D with a minimum power-off transient, turn this bit to 1, then wait for at least a few milliseconds before activating reset. SS APDOWN1 controls internal analog powerdown. This bit is meant to be used by the system firmware only. SS AVOL is the analog volume control: 0 = -0 dB, 1 = -6 dB, 3 = -12 dB. This register is meant to be used automatically by the system firmware only.
8.6.3
SCI BASS (RW) Bits 7..4 3..0 Description Enhancement in 1 dB steps (0..15) Lower limit frequency in 10 Hz steps (2..15)
Name SB AMPLITUDE SB FREQLIMIT
The Bass Enhancer VSBE is a powerful bass boosting DSP algorithm, which tries to take the most out of the users earphones without causing clipping. VSBE is activated when SB AMPLITUDE is set to non-zero. SB AMPLITUDE should be set to the user's preferences, and SB FREQLIMIT to roughly 1.5 times the lowest frequency the user's audio system can reproduce. Note: Because VSBE tries to avoid clipping, it gives the best bass boost with dynamical music material, or when the playback volume is not set to maximum.
8.6.4
SCI CLOCKF (RW)
SCI CLOCKF is used to tell if the input clock XTALI is running at something else than 24.576 MHz. XTALI is set in 2 kHz steps. Thus, the formula for calculating the correct value for this register is XT ALI 2000 (XTALI is in Hz). Values may be between 0..32767, although hardware limits the highest allowed speed.
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VS1002D
VS1002D
8. FUNCTIONAL DESCRIPTION
Also, with speeds lower than 24.576 MHz all sample rates and bitstream widths are no longer available. Setting the MSB of SCI CLOCKF to 1 activates internal clock-doubling. A clock of upto 15 MHz may be doubled depending on the voltage provided to the chip. Note: SCI CLOCKF must be set before beginning decoding audio data; otherwise the sample rate will not be set correctly. Note: Unlike with VS1011, SCI CLOCKF only needs to be written to after a hardware reset. Example 1: For a 26 MHz clock the value would be
26000000 2000
= 13000.
Example 2: For a 13 MHz external clock and using internal clock-doubling for a 26 MHz internal frequency, the value would be 0x8000 + 13000000 = 39268. 2000 Example 3: For a 24.576 MHz clock the value would be either 24576000 = 12288, or just the default 2000 value 0. For this clock frequency, SCI CLOCKF doesn't need to be set.
8.6.5
SCI DECODE TIME (RW)
When decoding correct data, current decoded time is shown in this register in full seconds. The user may change the value of this register. However, in that case the new value should be written twice. SCI DECODE TIME is reset at every software reset.
8.6.6
SCI AUDATA (RW)
When decoding correct data, the current sample rate and number of channels can be found in bits 15..1 and 0 of SCI AUDATA, respectively. Bits 15..1 contain the sample rate divided by two, and bit 0 is 0 for mono data and 1 for stereo. Writing to this register will change the sample rate on the run to the number given. Example: 44100 Hz stereo data reads as 0xAC45 (44101).
8.6.7
SCI WRAM (RW)
SCI WRAM is used to upload application programs and data to instruction and data RAMs. The start address must be initialized by writing to SCI WRAMADDR prior to the first call of SCI WRAM. As 16 bits of data can be transferred with one SCI WRAM write, and the instruction word is 32 bits long, two consecutive writes are needed for each instruction word. The byte order is big-endian (i.e. MSBs first). After each full-word write, the internal pointer is autoincremented.
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VS1002D
VS1002D
8. FUNCTIONAL DESCRIPTION
SM WRAMADDR Start. . . End 0x1380. . . 0x13FF 0x4780. . . 0x47FF 0x8030. . . 0x84FF
Dest. addr. Start. . . End 0x1380. . . 0x13FF 0x0780. . . 0x07FF 0x0030. . . 0x04FF
Bits/ Word 16 16 32
Description X data RAM Y data RAM Instruction RAM
8.6.8
SCI WRAMADDR (RW)
SCI WRAMADDR is used to set the program address for following SCI WRAM writes.
8.6.9
SCI HDAT0 and SCI HDAT1 (R)
For WAV files, SPI HDAT0 and SPI HDAT1 read as 0x7761, and 0x7665, respectively. For MP3 files, SCI HDAT[0. . . 1] have the following content:
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Solution
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VS1002D
VS1002D
8. FUNCTIONAL DESCRIPTION
Bit HDAT1[15:5] HDAT1[4:3]
Function syncword ID
HDAT1[2:1]
layer
HDAT1[0] HDAT0[15:12] HDAT0[11:10]
protect bit bitrate sample rate
Value 2047 3 2 1 0 3 2 1 0 1 0 3 2 1 0 1 0 3 2 1 0 1 0 1 0 3 2 1 0
HDAT0[9] HDAT0[8] HDAT0[7:6]
pad bit private bit mode
HDAT0[5:4] HDAT0[3] HDAT0[2] HDAT0[1:0]
extension copyright original emphasis
Explanation stream valid ISO 11172-3 1.0 MPG 2.0 (1/2-rate) MPG 2.5 (1/4-rate) MPG 2.5 (1/4-rate) I II III reserved No CRC CRC protected ISO 11172-3 reserved 32/16/8 kHz 48/24/12 kHz 44/22/11 kHz additional slot normal frame not defined mono dual channel joint stereo stereo ISO 11172-3 copyrighted free original copy CCITT J.17 reserved 50/15 microsec none
When read, SCI HDAT0 and SCI HDAT1 contain header information that is extracted from MP3 stream being currently being decoded. Right after resetting VS1002D, 0 is automatically written to both registers, indicating no data has been found yet. The "sample rate" field in SCI HDAT0 is interpreted according to the following table: "sample rate" 3 2 1 0 ID=3 / Hz 32000 48000 44100 ID=2 / Hz 16000 24000 22050 ID=0,1 / Hz 8000 12000 11025
The "bitrate" field in HDAT0 is read according to the following table:
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VS1002D
8. FUNCTIONAL DESCRIPTION
"bitrate" 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
ID=3 / kbit/s forbidden 320 256 224 192 160 128 112 96 80 64 56 48 40 32 -
ID=0,1,2 / kbit/s forbidden 160 144 128 112 96 80 64 56 48 40 32 24 16 8 -
8.6.10
SCI AIADDR (RW)
SCI AIADDR indicates the start address of the application code written earlier with SCI WRAMADDR and SCI WRAM registers. If no application code is used, this register should not be initialized, or it should be initialized to zero. For more details, see Application Notes for VS10XX.
8.6.11
SCI VOL (RW)
SCI VOL is a volume control for the player hardware. For each channel, a value in the range of 0 .. 255 may be defined to set its attenuation from the maximum volume level (in 0.5 dB steps). The left channel value is then multiplied by 256 and the values are added. Thus, maximum volume is 0 and total silence if 0xFFFF. Example: for a volume of -2.0 dB for the left channel and -3.5 dB for the right channel: (4*256) + 7 = 0x407. Note, that at startup volume is set to full volume. Resetting the software does not reset the volume setting. Note: Setting the volume to total silence (255 for both left and right channels) will turn analog power off.
8.6.12
SCI AICTRL[x] (RW)
SCI AICTRL[x] registers ( x=[0 .. 3] ) can be used to access the user's application program.
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VS1002D
9. OPERATION
9
9.1
Operation
Clocking
VS1002D operates on a single, nominally 24.576 MHz fundamental frequency master clock. This clock can be generated by external circuitry (connected to pin XTALI) or by the internal clock chrystal interface (pins XTALI and XTALO). This clock is sufficient to support a high quality audio output for almost all standard sample rates and bit-rates (see Application Notes for VS10XX).
9.2
Hardware Reset
When the XRESET -signal is driven low, VS1002D is reset and all the control registers and internal states are set to the initial values. XRESET-signal is asynchronous to any external clock. The reset mode doubles as a full-powerdown mode, where both digital and analog parts of VS1002D are in minimum power consumption stage, and where clocks are stopped. Also XTALO and XTALI are grounded. After a hardware reset (or at power-up), the user should set such basic software registers as SCI VOL for volume (and SCI CLOCKF if the input clock is anything else than 24.576 MHz) before starting decoding.
9.3 Software Reset
In some cases the decoder software has to be reset. This is done by activating bit 2 in SCI MODE register (Chapter 8.6.1). Then wait for at least 2 s, then look at DREQ. DREQ will stay down for at least 6000 clock cycles, which means an approximate 250 s delay if VS1002D is run at 24.576 MHz. After DREQ is up, you may continue playback as usual. If you want to make sure VS1002D doesn't cut the ending of low-bitrate data streams and you want to do a software reset, it is recommended to feed 2048 zeros to the SDI bus after the file and before the reset.
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VS1002D
9. OPERATION
9.4
SPI Boot
If GPIO0 is set with a pull-up resistor to 1 at boot time, VS1002D tries to boot from external SPI memory. SPI boot redefines the following pins:
Normal Mode GPIO0 GPIO1 DREQ GPIO2
SPI Boot Mode xCS CLK MOSI MISO
The memory has to be an SPI Bus Serial EEPROM with 16-bit addresses (i.e. at least 1 KiB). The serial speed used by VS1002D is 490 kHz with the nominal 24.576 MHz clock. The first three bytes in the memory have to be 0x50 0x26, 0x48. The exact record format is explained in the Application Notes for VS10XX.
9.5
Play/Decode
This is the normal operation mode of VS1002D. SDI data is decoded. Decoded samples are converted to analog domain by the internal DAC. If there bad problems in the decoding process, the error flags of SCI HDAT0 and SCI HDAT1 are set to 0 and analog outputs are muted. When there is no input for decoding, VS1002D goes into idle mode (lower power consumption than during decoding) and actively monitors the serial data input for valid data.
9.6
Feeding PCM data
VS1002D can be used as a PCM decoder by sending to it a WAV file header. If the length sent in the WAV file is 0 or 0xFFFFFFF, VS1002D will stay in PCM mode indefinitely. 8-bit linear and 16-bit linear audio is supported in mono or stereo.
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VS1002D
VS1002D
9. OPERATION
9.7
SDI Tests
There are several test modes in VS1002D, which allow the user to perform memory tests, SCI bus tests, and several different sine wave tests. All tests are started in a similar way: VS1002D is hardware reset, SM TESTS is set, and then a test command is sent to the SDI bus. Each test is started by sending a 4-byte special command sequence, followed by 4 zeros. The sequences are described below.
9.7.1
Sine Test
Sine test is initialized with the 8-byte sequence 0x53 0xEF 0x6E n 0 0 0 0, where n defines the sine test to use. n is defined as follows: n bits Description Sample rate index Sine skip speed Fs 44100 Hz 48000 Hz 32000 Hz 22050 Hz 24000 Hz 16000 Hz 11025 Hz 12000 Hz
S 128 .
Name F s Idx S
Bits 7:5 4:0
F s Idx 0 1 2 3 4 5 6 7
The frequency of the sine to be output can now be calculated from F = F s x
Example: Sine test is activated with value 126, which is 0b01111110. Breaking n to its components, F s Idx = 0b011 = 1 and thus F s = 22050Hz. S = 0b11110 = 30, and thus the final sine frequency 30 F = 22050Hz x 128 5168Hz. To exit the sine test, send the sequence 0x45 0x78 0x69 0x74 0 0 0 0. Note: Sine test signals go through the digital volume control, so it is possible to test channels separately.
9.7.2
Pin Test
Pin test is activated with the 8-byte sequence 0x50 0xED 0x6E 0x54 0 0 0 0. This test is meant for chip production testing only.
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VS1002D
Memory Test
VS1002D
9. OPERATION
9.7.3
Memory test mode is initialized with the 8-byte sequence 0x4D 0xEA 0x6D 0x54 0 0 0 0. After this sequence, wait for 200000 clock cycles. The result can be read from the SCI register SCI HDAT0, and 'one' bits are interpreted as follows: Bit(s) 15 14..7 6 5 4 3 2 1 0 Meaning Test finished Unused Mux test succeeded Good I RAM Good Y RAM Good X RAM Good I ROM Good Y ROM Good X ROM
Memory tests overwrite the current contents of the RAM memories.
9.7.4
SCI Test
Sci test is initialized with the 8-byte sequence 0x53 0x70 0xEE n 0 0 0 0, where n - 48 is the register number to test. The content of the given register is read and copied to SCI HDAT0. If the register to be tested is HDAT0, the result is copied to SCI HDAT1. Example: if n is 48, contents of SCI register 0 (SCI MODE) is copied to SCI HDAT0.
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VS1002D
VS1002D
10. VS1002D REGISTERS
10
10.1
VS1002D Registers
Who Needs to Read This Chapter
User software is required when a user wishes to add some own functionality like DSP effects or tone controls to VS1002D. However, most users of VS1002D don't need to worry about writing their own code, or about this chapter, including those who only download software plug-ins from VLSI Solution's Web site.
10.2
The Processor Core
VS DSP is a 16/32-bit DSP processor core that also had extensive all-purpose processor features. VLSI Solution's free VSKIT Software Package contains all the tools and documentation needed to write, simulate and debug Assembly Language or Extended ANSI C programs for the VS DSP processor core. VLSI Solution also offers a full Integrated Development Environment VSIDE for full debug capabilities.
10.3 VS1002D Memory Map
VS1002D's Memory Map is shown in Figure 14.
10.4 SCI Registers
SCI registers described in Chapter 8.6 can be found here between 0xC000..0xC00F. In addition to these registers, there is one in address 0xC010, called SPI CHANGE. SPI registers, prefix SPI Abbrev[bits] Description CHANGE[5:0] Last SCI access address. SPI CHANGE bits Bits Description 4 1 if last access was a write cycle. 3:0 SPI address of last access.
Reg 0xC010
Type r
Reset 0
Name SPI CH WRITE SPI CH ADDR
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VS1002D
10. VS1002D REGISTERS
Instruction (32-bit)
X (16-bit)
Y (16-bit)
0000 0030 0098 0500 0780 0800 0C00 1000 1380 1400 1800 4000
System Vectors User Instruction RAM
Stack
Stack
0000 0030 0098 0500 0780
X DATA RAM
Y DATA RAM User Space
0800 0C00
PlusV Space
1000 1380
User Space
1400 1800 4000
Instruction ROM 6000 7000
X DATA ROM
Y DATA ROM 6000 7000
C000 Hardware Register Space
C000
C100
C100
Figure 14: User's Memory Map.
10.5 Serial Data Registers
SDI registers, prefix SER Abbrev[bits] Description DATA Last received 2 bytes, big-endian. DREQ[0] DREQ pin control.
Reg 0xC011 0xC012
Type r w
Reset 0 0
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DAC Registers
VS1002D
10. VS1002D REGISTERS
10.6
Reg 0xC013 0xC014 0xC015 0xC016
Type rw rw rw rw
Reset 0 0 0 0
DAC registers, prefix DAC Abbrev[bits] Description FCTLL DAC frequency control, 16 LSbs. FCTLH[4:0] Clock doubler + DAC frequency control MSbs. LEFT DAC left channel PCM value. RIGHT DAC right channel PCM value.
Every fourth clock cycle, an internal 26-bit counter is added to by DAC FCTLH[3:0] x 65536 + DAC FCTLL. Whenever this counter overflows, values from DAC LEFT and DAC RIGHT are read and a DAC interrupt is generated. If DAC FCTL[4] is 1, the internal clock doubler is activated.
10.7
GPIO Registers
GPIO registers, prefix GPIO Abbrev[bits] Description DDR[3:0] Direction. IDATA[3:0] Values read from the pins. ODATA[3:0] Values set to the pins.
Reg 0xC017 0xC018 0xC019
Type rw r rw
Reset 0 0 0
GPIO DIR is used to set the direction of the GPIO pins. 1 means output. GPIO ODATA remembers its values even if a GPIO DIR bit is set to input. GPIO registers don't generate interrupts. Note: Bits 2 and 3 of GPIO DDR and GPIO ODATA are switched in prototypes VS1002b and VS1002c. Thus, for example, writing 8 to both registers will set pin GPIO2 to 1 instead of GPIO3.
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VS1002D
Interrupt Registers
VS1002D
10. VS1002D REGISTERS
10.8
Reg 0xC01A 0xC01B 0xC01C 0xC01D
Type rw w w rw
Reset 0 0 0 0
Interrupt registers, prefix INT Abbrev[bits] Description ENABLE[7:0] Interrupt enable. GLOB DIS[-] Write to add to interrupt counter. GLOB ENA[-] Write to subtract from interript counter. COUNTER[4:0] Interrupt counter.
INT ENABLE controls the interrupts. The control bits are as follows: INT ENABLE bits Description Enable Timer 1 interrupt. Enable Timer 0 interrupt. Enable UART RX interrupt. Enable UART TX interrupt. Enable AD modulator interrupt. Enable Data interrupt. Enable SCI interrupt. Enable DAC interrupt.
Name INT EN INT EN INT EN INT EN INT EN INT EN INT EN INT EN
TIM1 TIM0 RX TX MODU SDI SCI DAC
Bits 7 6 5 4 3 2 1 0
Note: It may take upto 6 clock cycles before changing INT ENABLE has any effect. Writing any value to INT GLOB DIS adds one to the interrupt counter INT COUNTER and effectively disables all interrupts. It may take upto 6 clock cycles before writing to this register has any effect. Writing any value to INT GLOB ENA subtracts one from the interrupt counter (unless INT COUNTER already was 0). If the interrupt counter becomes zero, interrupts selected with INT ENABLE are restored. An interrupt routine should always write to this register as the last thing it does, because interrupts automatically add one to the interrupt counter, but subtracting it back to its initial value is the responsibility of the user. It may take upto 6 clock cycles before writing this register has any effect. By reading INT COUNTER the user may check if the interrupt counter is correct or not. If the register is not 0, interrupts are disabled.
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VS1002D
A/D Modulator Registers
Interrupt registers, prefix AD Abbrev[bits] Description DIV A/D Modulator divider. DATA A/D Modulator data. AD DIV bits Description 1 in powerdown. Divider.
VS1002D
10. VS1002D REGISTERS
10.9
Reg 0xC01E 0xC01F
Type rw rw
Reset 0 0
Name ADM POWERDOWN ADM DIVIDER
Bits 15 14:0
ADM DIVIDER controls the AD converter's sampling frequency. To gather one sample, 128 x n clock cycles are used (n is value of AD DIV). The lowest usable value is 4, which gives a 48 kHz sample rate when CLKI is 24.576 MHz. When ADM POWERDOWN is 1, the A/D converter is turned off. AD DATA contains the latest decoded A/D value.
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VS1002D
Watchdog v1.0 2002-08-26
VS1002D
10. VS1002D REGISTERS
10.10
The watchdog consist of a watchdog counter and some logic. After reset, the watchdog is inactive. The counter reload value can be set by writing to WDOG CONFIG. The watchdog is activated by writing 0x4ea9 to register WDOG RESET. Every time this is done, the watchdog counter is reset. Every 65536'th clock cycle the counter is decremented by one. If the counter underflows, it will activate vsdsp's internal reset sequence. Thus, after the first 0x4ea9 write to WDOG RESET, subsequent writes to the same register with the same value must be made no less than every 65536xWDOG CONFIG clock cycles. Once started, the watchdog cannot be turned off. Also, a write to WDOG CONFIG doesn't change the counter reload value. After watchdog has been activated, any read/write operation from/to WDOG CONFIG or WDOG DUMMY will invalidate the next write operation to WDOG RESET. This will prevent runaway loops from resetting the counter, even if they do happen to write the correct number. Writing a wrong value to WDOG RESET will also invalidate the next write to WDOG RESET. Reads from watchdog registers return undefined values.
10.10.1
Registers Watchdog, prefix WDOG Type Reset Abbrev Description w 0 CONFIG Configuration w 0 RESET Clock configuration w 0 DUMMY[-] Dummy register
Reg 0xC020 0xC021 0xC022
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VS1002D
UART v1.0 2002-04-23
VS1002D
10. VS1002D REGISTERS
10.11
RS232 UART implements a serial interface using rs232 standard.
Start bit D0 D1 D2 D3 D4 D5 D6 Stop D7 bit
Figure 15: RS232 Serial Interface Protocol When the line is idling, it stays in logic high state. When a byte is transmitted, the transmission begins with a start bit (logic zero) and continues with data bits (LSB first) and ends up with a stop bit (logic high). 10 bits are sent for each 8-bit byte frame.
10.11.1
Registers UART registers, prefix UARTx Type Reset Abbrev Description r 0 STATUS[3:0] Status r/w 0 DATA[7:0] Data r/w 0 DATAH[15:8] Data High r/w 0 DIV Divider
Reg 0xC028 0xC029 0xC02A 0xC02B
10.11.2 Status UARTx STATUS A read from the status register returns the transmitter and receiver states. UARTx STATUS Bits Bits Description 3 Receiver overrun 2 Receiver data register full 1 Transmitter data register full 0 Transmitter running
Name UART UART UART UART
ST ST ST ST
RXORUN RXFULL TXFULL TXRUNNING
UART ST RXORUN is set if a received byte overwrites unread data when it is transferred from the receiver shift register to the data register, otherwise it is cleared. UART ST RXFULL is set if there is unread data in the data register. UART ST TXFULL is set if a write to the data register is not allowed (data register full). UART ST TXRUNNING is set if the transmitter shift register is in operation.
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VS1002D
10. VS1002D REGISTERS
10.11.3 Data UARTx DATA A read from UARTx DATA returns the received byte in bits 7:0, bits 15:8 are returned as '0'. If there is no more data to be read, the receiver data register full indicator will be cleared. A receive interrupt will be generated when a byte is moved from the receiver shift register to the receiver data register. A write to UARTx DATA sets a byte for transmission. The data is taken from bits 7:0, other bits in the written value are ignored. If the transmitter is idle, the byte is immediately moved to the transmitter shift register, a transmit interrupt request is generated, and transmission is started. If the transmitter is busy, the UART ST TXFULL will be set and the byte remains in the transmitter data register until the previous byte has been sent and transmission can proceed.
10.11.4
Data High UARTx DATAH
The same as UARTx DATA, except that bits 8..15 are used.
10.11.5 Divider UARTx DIV UARTx DIV Bits Bits Description 15:8 Divider 1 (0..255) 7:0 Divider 2 (6..255)
Name UART DIV D1 UART DIV D2
The divider is set to 0x0000 in reset. The ROM boot code must initialize it correctly depending on the master clock frequency to get the correct bit speed. The second divider (D2 ) must be from 6 to 255. The communication speed f = TX/RX speed in bps.
fm (D1 +1)x(D2 )
, where fm is the master clock frequency, and f is the
Divider values for common communication speeds at 26 MHz master clock: Example UART Speeds, fm = 26M Hz Comm. Speed [bps] UART DIV D1 UART DIV D2 4800 85 63 9600 42 63 14400 42 42 19200 51 26 28800 42 21 38400 25 26 57600 1 226 115200 0 226
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VS1002D
VS1002D
10. VS1002D REGISTERS
10.11.6 Interrupts and Operation Transmitter operates as follows: After an 8-bit word is written to the transmit data register it will be transmitted instantly if the transmitter is not busy transmitting the previous byte. When the transmission begins a TX INTR interrupt will be sent. Status bit [1] informs the transmitter data register empty (or full state) and bit [0] informs the transmitter (shift register) empty state. A new word must not be written to transmitter data register if it is not empty (bit [1] = '0'). The transmitter data register will be empty as soon as it is shifted to transmitter and the transmission is begun. It is safe to write a new word to transmitter data register every time a transmit interrupt is generated. Receiver operates as follows: It samples the RX signal line and if it detects a high to low transition, a start bit is found. After this it samples each 8 bit at the middle of the bit time (using a constant timer), and fills the receiver (shift register) LSB first. Finally if a stop bit (logic high) is detected the data in the receiver is moved to the reveive data register and the RX INTR interrupt is sent and a status bit[2] (receive data register full) is set, and status bit[2] old state is copied to bit[3] (receive data overrun). After that the receiver returns to idle state to wait for a new start bit. Status bit[2] is zeroed when the receiver data register is read. RS232 communication speed is set using two clock dividers. The base clock is the processor master clock. Bits 15-8 in these registers are for first divider and bits 7-0 for second divider. RX sample frequency is the clock frequency that is input for the second divider.
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VS1002D
Timers v1.0 2002-04-23
VS1002D
10. VS1002D REGISTERS
10.12
There are two 32-bit timers that can be initialized and enabled independently of each other. If enabled, a timer initializes to its start value, written by a processor, and starts decrementing every clock cycle. When the value goes past zero, an interrupt is sent, and the timer initializes to the value in its start value register, and continues downcounting. A timer stays in that loop as long as it is enabled. A timer has a 32-bit timer register for down counting and a 32-bit TIMER1 LH register for holding the timer start value written by the processor. Timers have also a 2-bit TIMER ENA register. Each timer is enabled (1) or disabled (0) by a corresponding bit of the enable register.
10.12.1
Registers Timer registers, prefix TIMER Type Reset Abbrev Description r/w 0 CONFIG[7:0] Timer configuration r/w 0 ENABLE[1:0] Timer enable r/w 0 T0L Timer0 startvalue - LSBs r/w 0 T0H Timer0 startvalue - MSBs r/w 0 T0CNTL Timer0 counter - LSBs r/w 0 T0CNTH Timer0 counter - MSBs r/w 0 T1L Timer1 startvalue - LSBs r/w 0 T1H Timer1 startvalue - MSBs r/w 0 T1CNTL Timer1 counter - LSBs r/w 0 T1CNTH Timer1 counter - MSBs
Reg 0xC030 0xC031 0xC034 0xC035 0xC036 0xC037 0xC038 0xC039 0xC03A 0xC03B
10.12.2 Configuration TIMER CONFIG TIMER CONFIG Bits Bits Description 7:0 Master clock divider
Name TIMER CF CLKDIV
TIMER CF CLKDIV is the master clock divider for all timer clocks. The generated internal clock fm frequency fi = c+1 , where fm is the master clock frequency and c is TIMER CF CLKDIV. Example: With a 12 MHz master clock, TIMER CF DIV=3 divides the master clock by 4, and the output/sampling clock would thus be fi = 12M Hz = 3M Hz. 3+1
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VS1002D
VS1002D
10. VS1002D REGISTERS
10.12.3 Configuration TIMER ENABLE TIMER ENABLE Bits Bits Description 1 Enable timer 1 0 Enable timer 0
Name TIMER EN T1 TIMER EN T0
10.12.4 Timer X Startvalue TIMER Tx[L/H] The 32-bit start value TIMER Tx[L/H] sets the initial counter value when the timer is reset. The timer fi interrupt frequency ft = c+1 where fi is the master clock obtained with the clock divider (see Chapter 10.12.2 and c is TIMER Tx[L/H]. Example: With a 12 MHz master clock and with TIMER CF CLKDIV=3, the master clock fi = 3M Hz. If TIMER TH=0, TIMER TL=99, then the timer interrupt frequency ft = 3M Hz = 30kHz. 99+1
10.12.5
Timer X Counter TIMER TxCNT[L/H]
TIMER TxCNT[L/H] contains the current counter values. By reading this register pair, the user may get knowledge of how long it will take before the next timer interrupt. Also, by writing to this register, a one-shot different length timer interrupt delay may be realized.
10.12.6
Interrupts
Each timer has its own interrupt, which is asserted when the timer counter underflows.
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VS1002D
System Vector Tags
VS1002D
10. VS1002D REGISTERS
10.13
The System Vector Tags are tags that may be replaced by the user to take control over several decoder functions.
10.13.1 AudioInt, 0x20 Normally contains the following VS DSP assembly code: jmpi DAC_INT_ADDRESS,(i6)+1 The user may, at will, replace the first instruction with a jmpi command to gain control over the audio interrupt.
10.13.2
SciInt, 0x21
Normally contains the following VS DSP assembly code: jmpi SCI_INT_ADDRESS,(i6)+1 The user may, at will, replace the instruction with a jmpi command to gain control over the SCI interrupt.
10.13.3
DataInt, 0x22
Normally contains the following VS DSP assembly code: jmpi SDI_INT_ADDRESS,(i6)+1 The user may, at will, replace the instruction with a jmpi command to gain control over the SDI interrupt.
10.13.4
ModuInt, 0x23
Normally contains the following VS DSP assembly code: jmpi MODU_INT_ADDRESS,(i6)+1 The user may, at will, replace the instruction with a jmpi command to gain control over the AD Modulator interrupt.
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VS1002D
VS1002D
10. VS1002D REGISTERS
10.13.5 TxInt, 0x24 Normally contains the following VS DSP assembly code: jmpi EMPTY_INT_ADDRESS,(i6)+1 The user may, at will, replace the instruction with a jmpi command to gain control over the UART TX interrupt.
10.13.6
RxInt, 0x25
Normally contains the following VS DSP assembly code: jmpi RX_INT_ADDRESS,(i6)+1 The user may, at will, replace the first instruction with a jmpi command to gain control over the UART RX interrupt.
10.13.7
Timer0Int, 0x26
Normally contains the following VS DSP assembly code: jmpi EMPTY_INT_ADDRESS,(i6)+1 The user may, at will, replace the first instruction with a jmpi command to gain control over the Timer 0 interrupt.
10.13.8
Timer1Int, 0x27
Normally contains the following VS DSP assembly code: jmpi EMPTY_INT_ADDRESS,(i6)+1 The user may, at will, replace the first instruction with a jmpi command to gain control over the Timer 1 interrupt.
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VS1002D
VS1002D
10. VS1002D REGISTERS
10.13.9 UserCodec, 0x0 Normally contains the following VS DSP assembly code: jr nop If the user wants to take control away from the standard decoder, the first instruction should be replaced with an appropriate j command to user's own code. Unless the user is feeding MP3 data at the same time, the system activates the user program in less than 1 ms. After this, the user should steal interrupt vectors from the system, and insert user programs.
10.14
System Vector Functions
The System Vector Functions are pointers to some functions that the user may call to help implementing his own applications.
10.14.1 WriteIRam(), 0x2 VS DSP C prototype: void WriteIRam(register i0 u int16 *addr, register a1 u int16 msW, register a0 u int16 lsW); This is the only supported way to write to the User Instruction RAM. This is because Instruction RAM cannot be written when program control is in RAM. Thus, the actual implementation of this function is in ROM, and here is simply a tag to that routine.
10.14.2
ReadIRam(), 0x4
VS DSP C prototype: u int32 ReadIRam(register i0 u int16 *addr); This is the only supported way to read from the User Instruction RAM. This is because Instruction RAM cannot be read when program control is in RAM. Thus, the actual implementation of this function is in ROM, and here is simply a tag to that routine. A1 contains the MSBs and a0 the LSBs of the result.
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VS1002D
VS1002D
10. VS1002D REGISTERS
10.14.3 DataBytes(), 0x6 VS DSP C prototype: u int16 DataBytes(void); If the user has taken over the normal operation of the system by switching the pointer in UserCodec to point to his own code, he may read data from the Data Interface through this and the following two functions. This function returns the number of data bytes that can be read.
10.14.4 GetDataByte(), 0x8 VS DSP C prototype: u int16 GetDataByte(void); Reads and returns one data byte from the Data Interface. This function will wait until there is enough data in the input buffer.
10.14.5 GetDataWords(), 0xa VS DSP C prototype: void GetDataWords(register i0 y u int16 *d, register a0 u int16 n); Read n data byte pairs and copy them in big-endian format (first byte to MSBs) to d. This function will wait until there is enough data in the input buffer.
10.14.6
Reboot(), 0xc
VS DSP C prototype: void Reboot(void); Causes a software reboot.
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VS1002D
VS1002D
11. VS1002 VERSION CHANGES
11
VS1002 Version Changes
This chapter describes changes between different generations of VS1002.
11.1
Changes Between VS1002c and VS1002D, 2004-05-13
* ADPCM recording now works without software patches.
Version 1.0,
2005-04-27
52
VLSI
Solution
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VS1002D
VS1002D
12. DOCUMENT VERSION CHANGES
12
Document Version Changes
This chapter describes the most important changes to this document.
12.1
Version 1.0 for VS1002D, 2005-04-27
* RX should be connected to VDD if UART is not used. * Limits updated * Qualified production version
12.2
Version 0.71 for VS1002D, 2004-07-20
* Added instructions to add 100 k pull-down resistor to unused GPIOs to Chapter 5.2.
12.3 Version 0.70 for VS1002D, 2004-05-13
* Updated document for VS1002D. * Removed SM JUMP.
12.4 Version 0.62 for VS1002c, 2004-03-24
* Redrew Figure 3 to include new microphone connection and serial port. * Rewrote and clarified Chapter 8.2, Supported Audio Codecs.
12.5
Version 0.61 for VS1002c, 2004-03-11
* Added samplerate and bitrate tables to Chapter 8.6.9.
12.6
Version 0.6 for VS1002c, 2004-02-13
* A/D Modulator powerdown bit explained in (Chapter 10.9). * Added BGA-49 to Packages and Pin Descriptions (Chapter 5). * Added new Chapter 8.2, Supported Audio Codecs.
Version 1.0,
2005-04-27
53
VLSI
Solution
y
VS1002D
13 Contact Information
VS1002D
13. CONTACT INFORMATION
VLSI Solution Oy Hermiankatu 6-8 C FIN-33720 Tampere FINLAND Fax: +358-3-316 5220 Phone: +358-3-316 5230 Email: sales@vlsi.fi URL: http://www.vlsi.fi/ Note: If you have questions, first see the Frequently Asked Questions at http://www.vlsi.fi/ .
Version 1.0,
2005-04-27
54

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