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W78E52C/W78E052C Data Sheet 8-BIT MICROCONTROLLER
Table of Contents1. 2. 3. 4. 5. GENERAL DESCRIPTION ......................................................................................................... 2 FEATURES ................................................................................................................................. 2 PIN CONFIGURATIONS ............................................................................................................ 3 PIN DESCRIPTION..................................................................................................................... 4 FUNCTIONAL DESCRIPTION ................................................................................................... 5 5.1 5.2 5.3 5.4 5.5 5.6 6. 6.1 6.2 6.3 7. 7.1 7.2 7.3 8. 8.1 8.2 8.3 8.4 9. 9.1 9.2 10. 10.1 10.2 10.3 11. Timers 0, 1, and 2 ........................................................................................................... 5 New Defined Peripheral.................................................................................................. 5 Watchdog Timer ............................................................................................................. 7 Clock ............................................................................................................................... 9 Power Management........................................................................................................ 9 Reset............................................................................................................................... 9 Lock Bit ......................................................................................................................... 10 MOVC Inhibit................................................................................................................. 10 Encryption ..................................................................................................................... 10 Absolute Maximum Ratings .......................................................................................... 11 D.C. Characteristics...................................................................................................... 11 A.C. Characteristics ...................................................................................................... 13 Program Fetch Cycle .................................................................................................... 16 Data Read Cycle........................................................................................................... 16 Data Write Cycle ........................................................................................................... 17 Port Access Cycle......................................................................................................... 17 Expanded External Program Memory and Crystal ....................................................... 18 Expanded External Data Memory and Oscillator ......................................................... 19 40-pin DIP ..................................................................................................................... 20 44-pin PLCC ................................................................................................................. 20 44-pin PQFP ................................................................................................................. 21
SECURITY BITS ....................................................................................................................... 10
ELECTRICAL CHARACTERISTICS......................................................................................... 11
TIMING WAVEFORMS ............................................................................................................. 16
TYPICAL APPLICATION CIRCUITS ........................................................................................ 18
PACKAGE DIMENSIONS ......................................................................................................... 20
REVISION HISTORY ................................................................................................................ 22
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Publication Release Date: November 6, 2006 Revision A4
W78E52C/W78E052C
1. GENERAL DESCRIPTION
The W78E052C is an 8-bit microcontroller which can accommodate a wider frequency range with low power consumption. The instruction set for the W78E052C is fully compatible with the standard 8051. The W78E052C contains an 8K bytes Flash EPROM; a 256 bytes RAM; four 8-bit bi-directional and bit-addressable I/O ports; an additional 4-bit I/O port P4; three 16-bit timer/counters; a hardware watchdog timer and a serial port. These peripherals are supported by eight sources two-level interrupt capability. To facilitate programming and verification, the Flash EPROM inside the W78E052C allows the program memory to be programmed and read electronically. Once the code is confirmed, the user can protect the code for security. The W78E052C microcontroller has two power reduction modes, idle mode and power-down mode, both of which are software selectable. The idle mode turns off the processor clock but allows for continued peripheral operation. The power-down mode stops the crystal oscillator for minimum power consumption. The external clock can be stopped at any time and in any state without affecting the processor.
2. FEATURES
* * * * * * * * * * * * * * * * Fully static design 8-bit CMOS microcontroller Wide supply voltage of 4.5V to 5.5V 256 bytes of on-chip scratchpad RAM 8 KB On-chip Flash EPROM 64 KB program memory address space 64 KB data memory address space Four 8-bit bi-directional ports One extra 4-bit bit-addressable I/O port, additional INT2 / INT3 (available on 44-pin PLCC/QFP package) Three 16-bit timer/counters One full duplex serial port(UART) Watchdog Timer Eight sources, two-level interrupt capability EMI reduction mode Built-in power management Code protection mechanism Packages: - Lead Free (RoHS) DIP 40: W78E052C40DL - Lead Free (RoHS) PLCC 44: W78E052C40PL - Lead Free (RoHS) PQFP 44: W78E052C40FL
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W78E52C/W78E052C
3. PIN CONFIGURATIONS
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Publication Release Date: November 6, 2006 Revision A4
W78E52C/W78E052C
4. PIN DESCRIPTION
SYMBOL DESCRIPTIONS
EA
EXTERNAL ACCESS ENABLE: This pin forces the processor to execute out of external ROM. It should be kept high to access internal ROM. The ROM address and data will not be presented on the bus if EA pin is high and the program counter is within on-chip ROM area. PROGRAM STORE ENABLE: PSEN enables the external ROM data onto the Port 0 address/ data bus during fetch and MOVC operations. When internal ROM access is performed, no PSEN strobe signal outputs from this pin. ADDRESS LATCH ENABLE: ALE is used to enable the address latch that separates the address from the data on Port 0. RESET: A high on this pin for two machine cycles while the oscillator is running resets the device. CRYSTAL1: This is the crystal oscillator input. This pin may be driven by an external clock. CRYSTAL2: This is the crystal oscillator output. It is the inversion of XTAL1. GROUND: Ground potential POWER SUPPLY: Supply voltage for operation. PORT 0: Port 0 is a bi-directional I/O port which also provides a multiplexed low order address/data bus during accesses to external memory. The Port 0 is also an opendrain port and external pull-ups need to be connected while in programming. PORT 1: Port 1 is a bi-directional I/O port with internal pull-ups. The bits have alternate functions which are described below: T2(P1.0): Timer/Counter 2 external count input T2EX(P1.1): Timer/Counter 2 Reload/Capture control PORT 2: Port 2 is a bi-directional I/O port with internal pull-ups. This port also provides the upper address bits for accesses to external memory. PORT 3: Port 3 is a bi-directional I/O port with internal pull-ups. All bits have alternate functions, which are described below: RXD(P3.0) : Serial Port receiver input TXD(P3.1) : Serial Port transmitter output
INT0 (P3.2) : External Interrupt 0
PSEN
ALE RST XTAL1 XTAL2 VSS VDD P0.0-P0.7
P1.0-P1.7
P2.0-P2.7
P3.0-P3.7
INT1(P3.3) : External Interrupt 1 T0(P3.4) : Timer 0 External Input T1(P3.5) : Timer 1 External Input WR (P3.6) : External Data Memory Write Strobe RD (P3.7) : External Data Memory Read Strobe
PORT 4: Another bit-addressable bidirectional I/O port P4. P4.3 and P4.2 are alternative function pins. It can be used as general I/O port or external interrupt input sources (INT2 /INT3 ).
P4.0-P4.3
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W78E52C/W78E052C
5. FUNCTIONAL DESCRIPTION
The W78E052C architecture consists of a core controller surrounded by various registers, five general purpose I/O ports, 256 bytes of RAM, three timer/counters, and a serial port. The processor supports 111 different opcodes and references both a 64K program address space and a 64K data storage space.
5.1 Timers 0, 1, and 2
Timers 0, 1, and 2 each consist of two 8-bit data registers. These are called TL0 and TH0 for Timer 0, TL1 and TH1 for Timer 1, and TL2 and TH2 for Timer 2. The TCON and TMOD registers provide control functions for timers 0 and 1. The T2CON register provides control functions for Timer 2. RCAP2H and RCAP2L are used as reload/capture registers for Timer 2. The operations of Timer 0 and Timer 1 are the same as in the W78C51. Timer 2 is a special feature of the W78E54B: it is a 16-bit timer/counter that is configured and controlled by the T2CON register. Like Timers 0 and 1, Timer 2 can operate as either an external event counter or as an internal timer, depending on the setting of bit C/T2 in T2CON. Timer 2 has three operating modes: capture, autoreload, and baud rate generator. The clock speed at capture or auto-reload mode is the same as that of Timers 0 and 1.
5.2 New Defined Peripheral
In order to be more suitable for I/O, an extra 4-bit bit-addressable port P4 and two external interrupt INT2 , INT3 has been added to either the PLCC or QFP 44 pin package. And description follows:
INT2 / INT3
Two additional external interrupts, INT2 and INT3 , whose functions are similar to those of external interrupt 0 and 1 in the standard 80C52. The functions/status of these interrupts are determined/shown by the bits in the XICON (External Interrupt Control) register. The XICON register is bit-addressable but is not a standard register in the standard 80C52. Its address is at 0C0H. To set/clear bits in the XICON register, one can use the "SETB (/CLR) bit" instruction. For example, "SETB 0C2H" sets the EX2 bit of XICON. XICON - external interrupt control (C0H) PX3 EX3 IE3 IT3 PX2 EX2 IE2 IT2
PX3: External interrupt 3 priority high if set EX3: External interrupt 3 enable if set IE3: If IT3 = 1, IE3 is set/cleared automatically by hardware when interrupt is detected/serviced IT3: External interrupt 3 is falling-edge/low-level triggered when this bit is set/cleared by software PX2: External interrupt 2 priority high if set EX2: External interrupt 2 enable if set IE2: If IT2 = 1, IE2 is set/cleared automatically by hardware when interrupt is detected/serviced IT2: External interrupt 2 is falling-edge/low-level triggered when this bit is set/cleared by software
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Publication Release Date: November 6, 2006 Revision A4
W78E52C/W78E052C
Eight-source interrupt information:
INTERRUPT SOURCE VECTOR ADDRESS POLLING SEQUENCE WITHIN PRIORITY LEVEL ENABLE REQUIRED SETTINGS INTERRUPT TYPE EDGE/LEVEL
External Interrupt 0 Timer/Counter 0 External Interrupt 1 Timer/Counter 1 Serial Port Timer/Counter 2 External Interrupt 2 External Interrupt 3
03H 0BH 13H 1BH 23H 2BH 33H 3BH
0 (highest) 1 2 3 4 5 6 7 (lowest)
IE.0 IE.1 IE.2 IE.3 IE.4 IE.5 XICON.2 XICON.6
TCON.0 TCON.2 XICON.0 XICON.3
PORT4
Another bit-addressable port P4 is also available and only 4 bits (P4<3:0>) can be used. This port address is located at 0D8H with the same function as that of port P1, except the P4.3 and P4.2 are alternative function pins. It can be used as general I/O pins or external interrupt input sources ( INT2 , INT3 ). Example: P4 MOV MOV ORL ANL REG 0D8H P4, #0AH ; Output data "A" through P4.0-P4.3. A, P4 ; Read P4 status to Accumulator. P4,#00000001B ; Set bit P4.0 P4,#11111101B ; Clear bit P4.1
Reduce EMI Emission
Because of on-chip ROM, when a program is running in internal ROM space, the ALE will be unused. The transition of ALE will cause noise, so it can be turned off to reduce the EMI emission if it is useless. Turning off the ALE signal transition only requires setting the bit 0 of the AUXR SFR, which is located at 08Eh. When ALE is turned off, it will be reactivated when the program accesses external ROM/RAM data or jumps to execute an external ROM code. The ALE signal will turn off again after it has been completely accessed or the program returns to internal ROM code space. The AO bit in the AUXR register, when set, disables the ALE output. In order to reduce EMI emission from oscillation circuitry, W78E052C allows user to diminish the gain of on-chip oscillator amplifiers by using programmer to clear the B7 bit of security register. Once B7 is set to 0, a half of gain will be decreased. Care must be taken if user attempts to diminish the gain of oscillator amplifier, reducing a half of gain may affect the external crystal operating improperly at high frequency above 24 MHz. The value of R and C1,C2 may need some adjustment while running at lower gain.
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W78E52C/W78E052C
***AUXR - Auxiliary register (8EH) AO
AO: Turn off ALE output.
Power-off Flag
***PCON - Power control (87H) POF GF1 GF0 PD IDL
POF:
Power off flag. Bit is set by hardware when power on reset. It can be cleared by software to determine chip reset is a warm boot or cold boot. Power down mode bit. Set it to enter power down mode. Idle mode bit. Set it to enter idle mode.
GF1, GF0: These two bits are general-purpose flag bits for the user. PD: IDL:
The power-off flag is located at PCON.4. This bit is set when VDD has been applied to the part. It can be used to determine if a reset is a warm boot or a cold boot if it is subsequently reset by software.
5.3 Watchdog Timer
The Watchdog timer is a free-running timer which can be programmed by the user to serve as a system monitor, a time-base generator or an event timer. It is basically a set of dividers that divide the system clock. The divider output is selectable and determines the time-out interval. When the time-out occurs a system reset can also be caused if it is enabled. The main use of the Watchdog timer is as a system monitor. This is important in real-time control applications. In case of power glitches or electromagnetic interference, the processor may begin to execute errant code. If this is left unchecked the entire system may crash. The watchdog time-out selection will result in different time-out values depending on the clock speed. The Watchdog timer will de disabled on reset. In general, software should restart the Watchdog timer to put it into a known state. The control bits that support the Watchdog timer are discussed below. Watchdog Timer Control Register Bit: 7 ENW 6 CLRW 5 WIDL 4 3 2 PS2 1 PS1 0 PS0
Mnemonic: WDTC
Address: 8FH
ENW : Enable watch-dog if set. CLRW : Clear watch-dog timer and prescaler if set. This flag will be cleared automatically WIDL : If this bit is set, watch-dog is enabled under IDLE mode. If cleared, watch-dog is disabled under IDLE mode. Default is cleared.
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Publication Release Date: November 6, 2006 Revision A4
W78E52C/W78E052C
PS2, PS1, PS0: Watch-dog prescaler timer select. Prescaler is selected when set PS2~0 as follows:
PS2 PS1 PS0 PRESCALER SELECT
0 0 0 0 1 1 1 1
0 0 1 1 0 0 1 1
0 1 0 1 0 1 0 1
2 4 8 16 32 64 128 256
The time-out period is obtained using the following equation: 1 x 214 x PRESCALER x 1000 x 12 mS OSC Before Watchdog time-out occurs, the program must clear the 14-bit timer by writing 1 to WDTC.6 (CLRW). After 1 is written to this bit, the 14-bit timer, prescaler and this bit will be reset on the next instruction cycle. The Watchdog timer is cleared on reset.
W IDL IDLE
ENW
EXTERNAL RESET 14-BIT TIMER
CLEAR
OSC
1/12
PRESCALER
INTERNAL RESET
W atchdog Timer Block Diagram
CLRW
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W78E52C/W78E052C
Typical Watch-Dog time-out period when OSC = 20 MHz
PS2 PS1 PS0 WATCHDOG TIME-OUT PERIOD
0 0 0 0 1 1 1 1
0 0 1 1 0 0 1 1
0 1 0 1 0 1 0 1
19.66 mS 39.32 mS 78.64 mS 157.28 mS 314.57 mS 629.14 mS 1.25 S 2.50 S
5.4 Clock
The W78E052C is designed to be used with either a crystal oscillator or an external clock. Internally, the clock is divided by two before it is used. This makes the W78E052C relatively insensitive to duty cycle variations in the clock. The W78E052C incorporates a built-in crystal oscillator. To make the oscillator work, a crystal must be connected across pins XTAL1 and XTAL2. In addition, a load capacitor must be connected from each pin to ground. An external clock source should be connected to pin XTAL1. Pin XTAL2 should be left unconnected. The XTAL1 input is a CMOS-type input, as required by the crystal oscillator.
5.5 Power Management
Idle Mode
The idle mode is entered by setting the IDL bit in the PCON register. In the idle mode, the internal clock to the processor is stopped. The peripherals and the interrupt logic continue to be clocked. The processor will exit idle mode when either an interrupt or a reset occurs.
Power-down Mode
When the PD bit of the PCON register is set, the processor enters the power-down mode. In this mode all of the clocks are stopped, including the oscillator. The only way to exit power-down mode is by a reset.
5.6 Reset
The external RESET signal is sampled at S5P2. To take effect, it must be held high for at least two machine cycles while the oscillator is running. An internal trigger circuit in the reset line is used to deglitch the reset line when the W78E052C is used with an external RC network. The reset logic also has a special glitch removal circuit that ignores glitches on the reset line. During reset, the ports are initialized to FFH, the stack pointer to 07H, PCON (with the exception of bit 4) to 00H, and all of the other SFR registers except SBUF to 00H. SBUF is not reset.
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Publication Release Date: November 6, 2006 Revision A4
W78E52C/W78E052C
6. SECURITY BITS
During the on-chip Flash EPROM operation mode, the ROM can be programmed and verified repeatedly. Until the code inside the ROM is confirmed OK, the code can be protected. The protection of ROM and those operations on it are described below. The W78E052C has a Security Register which can not be accessed in normal mode. These registers can only be accessed from the Flash EPROM operation mode. Those bits of the Security Register can not be changed once they have been programmed from high to low. They can only be reset through erase-all operation. The Security Register is addressed in the Flash EPROM operation mode by address #0FFFFh.
0000h
8KB On-chip ROM Program Memory
B7
Reserved
B2 B1 B0
Security Bits Reserved
1FFFh
B0 : Lock bit, logic 0 : active B1 : MOVC inhibit, logic 0 : the MOVC instruction in external memory cannot access the code in internal memory. logic 1 : no restriction. B2 : Encryption logic 0 : the encryption logic enable logic 1 : the encryption logic disable B7 : Osillator Control logic 0 : 1/2 gain logic 1 : Full gain Default 1 for all security bits. Reserved bits must be kept in logic 1.
Security Register
0FFFFh
Special Setting Register
6.1 Lock Bit
This bit is used to protect the customer's program code in the W78E052C. It may be set after the programmer finishes the programming and verifies sequence. Once this bit is set to logic 0, both the ROM data and Special Setting Register can not be accessed again.
6.2 MOVC Inhibit
This bit is used to restrict the accessible region of the MOVC instruction. It can prevent the MOVC instruction in external program memory from reading the internal program code. When this bit is set to logic 0, a MOVC instruction in external program memory space will be able to access code only in the external memory, not in the internal memory. A MOVC instruction in internal program memory space will always be able to access the ROM data in both internal and external memory. If this bit is logic 1, there are no restrictions on the MOVC instruction.
6.3 Encryption
This bit is used to enable/disable the encryption logic for code protection. Once encryption feature is enabled, the data presented on port 0 will be encoded via encryption logic. Only whole chip erase will reset this bit.
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W78E52C/W78E052C
7. ELECTRICAL CHARACTERISTICS
7.1 Absolute Maximum Ratings
PARAMETER SYMBOL MIN. MAX. UNIT
DC Power Supply Input Voltage Operating Temperature Storage Temperature
VDD-VSS VIN TA TST
-0.3 VSS -0.3 0 -55
+7.0 VDD +0.3 70 +150
V V C C
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device.
7.2 D.C. Characteristics
(VCC-VSS = 5V 10%, TA = 25 C, unless otherwise specified.)
PARAMETER
SYMBOL
TEST CONDITIONS
SPECIFICATION MIN. MAX.
UNIT
Operating Voltage Operating Current Idle Current Power Down Current Input Current P1, P2, P3 Logical 1-to-0 Transition Current P1, P2, P3 Input Current RST (*2) Input Leakage Current
(*1)
VDD IDD IIDLE IPWDN IIN1 No load VDD = 5.5V Idle mode VDD = 5.5V Power-down mode VDD = 5.5V VDD = 5.5V VIN = 0V or VDD VDD = 5.5V VIN = 2.0V (*1) VDD = 5.5V VIN = VDD VDD = 5.5V 0V < VIN < VDD VDD = 4.5V IOL1 = +2 mA VDD = 4.5V IOL2 = +4 mA VDD = 4.5V IOH1 = -100 A
4.5 -50
5.5 20 6 50 +10
V mA mA A A A A A V
ITL
-550
-
IIN2
-10
+300
ILK P0, EA Output Low Voltage P1, P2, P3 Output Low Voltage ALE, IN T1 , P0 P1, P2, P3
(*3)
-10
+10
VOL1
-
0.45
VOL2
-
0.45
V
Output High Voltage
VOH1
2.4
-
V
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W78E52C/W78E052C
DC Characteristics, continued
PARAMETER
SYMBOL
TEST CONDITIONS
SPECIFICATION MIN. MAX.
UNIT
Output High Voltage ALE, PSEN , P0 (Except RST) Input Low Voltage RST (*4) Input Low Voltage XTAL1 (*4) Input High Voltage (Except RST) Sink Current P1, P2, P3, P4 Input High Voltage RST (*4) Input High Voltage XTAL1 (*4) Sink Current P0, ALE, PSEN Source Current P1, P2, P3, P4 Source Current P0, ALE, PSEN
(*3) (*3) (*3)
VOH2
VDD = 4.5V IOH2 = -400 A VDD = 4.5V
2.4
-
V
Input Low Voltage
VIL1
0
0.8
V
VIL2
VDD = 4.5V
0
0.8
V
VIL3
VDD = 4.5V
0
0.8
V
VIH1 ISK1
VDD = 4.5V VDD = 4.5V VS = 0.45V VDD = 4.5V
2.4 4
VDD +0.2 12
V mA
VIH2
0.67 VDD
VDD +0.2
V
VIH3
VDD = 4.5V VDD = 4.5V VS = 0.45V VDD = 4.5V VS = 2.4V VDD = 4.5V V = 2.4V
0.67 VDD
VDD +0.2
V
ISK2
8
16
mA
ISR1
-100
-250
uA
ISR2
-8
-14
mA
Notes: *1. Pins P1, P2 and P3 source a transition current when they are being externally driven from 1 to 0. The transition current reaches its maximum value when VIN is approximately 2V. *2. RST pin has an internal pull-down resistor. *3. P0, ALE, PSEN are in the external access memory mode. *4. XTAL1 is a CMOS input and RST is a Schmitt trigger input.
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W78E52C/W78E052C
7.3 A.C. Characteristics
The AC specifications are a function of the particular process used to manufacture the part, the ratings of the I/O buffers, the capacitive load, and the internal routing capacitance. Most of the specifications can be expressed in terms of multiple input clock periods (TCP), and actual parts will usually experience less than a 20 nS variation. The numbers below represent the performance expected from a 0.6micron CMOS process when using 2 and 4 mA output buffers.
Clock Input Waveform
XTAL1
T CH F OP, TCP T CL
PARAMETER
SYMBOL
MIN.
TYP.
MAX.
UNIT
NOTES
Operating Speed Clock Period Clock High Clock Low
FOP TCP TCH TCL
0 25 10 10
-
40 -
MHz nS nS nS
1 2 3 3
Notes: 1. The clock may be stopped indefinitely in either state. 2. The TCP specification is used as a reference in other specifications. 3. There are no duty cycle requirements on the XTAL1 input.
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W78E52C/W78E052C
Program Fetch Cycle
PARAMETER SYMBOL MIN. TYP. MAX. UNIT NOTES
Address Valid to ALE Low Address Hold from ALE Low ALE Low to PSEN Low
R E S Low to Data Valid
TAAS TAAH TAPL TPDA TPDH TPDZ TALW TPSW
1 TCP - 1 TCP - 1 TCP - 0 0 2 TCP - 3 TCP -
2 TCP 3 TCP
2 TCP 1 TCP 1 TCP -
nS nS nS nS nS nS nS nS
4 1, 4 4 2 3
Data Hold after PSEN High Data Float after PSEN High ALE Pulse Width
PSEN Pulse Width
4 4
Notes: 1. P0.0-P0.7, P2.0-P2.7 remain stable throughout entire memory cycle. 2. Memory access time is 3 TCP. 3. Data have been latched internally prior to PSEN going high. 4. "" (due to buffer driving delay and wire loading) is 20 nS.
Data Read Cycle
PARAMETER SYMBOL MIN. TYP. MAX. UNIT NOTES
ALE Low to RD Low
RD Low to Data Valid
TDAR TDDA TDDH TDDZ TDRD
3 TCP - 0 0 6 TCP -
6 TCP
3 TCP + 4 TCP 2 TCP 2 TCP -
nS nS nS nS nS
1, 2 1
Data Hold from RD High Data Float from RD High
RD Pulse Width
2
Notes: 1. Data memory access time is 8 TCP. 2. "" (due to buffer driving delay and wire loading) is 20 nS.
Data Write Cycle
PARAMETER SYMBOL MIN. TYP. MAX. UNIT
ALE Low to WR Low Data Valid to WR Low Data Hold from WR High
WR Pulse Width
TDAW TDAD TDWD TDWR
3 TCP - 1 TCP - 1 TCP - 6 TCP -
6 TCP
3 TCP + -
nS nS nS nS
Note: "" (due to buffer driving delay and wire loading) is 20 nS.
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W78E52C/W78E052C
Port Access Cycle
PARAMETER SYMBOL MIN. TYP. MAX. UNIT
Port Input Setup to ALE Low Port Input Hold from ALE Low Port Output to ALE
TPDS TPDH TPDA
1 TCP 0 1 TCP
-
-
nS nS nS
Note: Ports are read during S5P2, and output data becomes available at the end of S6P2. The timing data are referenced to ALE, since it provides a convenient reference.
Program Operation
PARAMETER SYMBOL MIN. TYP. MAX. UNIT
VPP Setup Time Data Setup Time Data Hold Time Address Setup Time Address Hold Time
TVPS TDS TDH TAS TAH Width for TPWP TOCS TOCH TOES TDFP TOEV
2.0 2.0 2.0 2.0 0 290 2.0 2.0 2.0 0 -
300 -
310 130 150
S S S S S S S S S nS nS
CE Program Pulse Program Operation
OECTRL Setup Time OECTRL Hold Time
OE Setup Time OE High to Output Float
Data Valid from OE
Note: Flash data can be accessed only in flash mode. The RST pin must pull in VIH status, the ALE pin must pull in VIL status,
and the PSEN pin must pull in VIH status.
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W78E52C/W78E052C
8. TIMING WAVEFORMS
8.1 Program Fetch Cycle
S1 XTAL1
S2
S3
S4
S5
S6
S1
S2
S3
S4
S5
S6
TALW ALE TAPL PSEN TPSW TAAS PORT 2 TAAH PORT 0 Code A0-A7 Data A0-A7 Code A0-A7 Data A0-A7 TPDA TPDH, TPDZ
8.2 Data Read Cycle
S4 XTAL1 ALE PSEN PORT 2
S5
S6
S1
S2
S3
S4
S5
S6
S1
S2
S3
A8-A15 A0-A7 DATA T DAR T DDA
PORT 0 T DDH, T DDZ RD T DRD
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W78E52C/W78E052C
Timing Waveforms, continued
8.3 Data Write Cycle
S4 XTAL1 ALE PSEN PORT 2 PORT 0 WR
S5
S6
S1
S2
S3
S4
S5
S6
S1
S2
S3
A8-A15 A0-A7 DATA OUT
TDAD
T DWD
T DAW
T DWR
8.4 Port Access Cycle
S5 XTAL1
S6
S1
ALE TPDS PORT INPUT SAMPLE T PDH T PDA DATA OUT
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W78E52C/W78E052C
9. TYPICAL APPLICATION CIRCUITS
9.1 Expanded External Program Memory and Crystal
VDD VDD 31 19 10 u R
CRYSTAL
EA XTAL1 XTAL2 RST INT0 INT1 T0 T1 P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 W78E52B
18 9
8.2 K C1 C2
P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7 P2.0 P2.1 P2.2 P2.3 P2.4 P2.5 P2.6 P2.7 RD WR PSEN ALE TXD RXD
39 38 37 36 35 34 33 32 21 22 23 24 25 26 27 28 17 16 29 30 11 10
AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 A8 A9 A10 A11 A12 A13 A14 A15
AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 GND
3 4 7 8 13 14 17 18 1 11
D0 D1 D2 D3 D4 D5 D6 D7 OC G 74373
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
2 5 6 9 12 15 16 19
A0 A1 A2 A3 A4 A5 A6 A7
12 13 14 15 1 2 3 4 5 6 7 8
A0 10 A1 9 A2 8 A3 7 A4 6 A5 5 A6 4 A7 3 A8 25 A9 24 A10 21 A11 23 A12 2 A13 26 A14 27 A15 1 GND 20 22
A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 CE OE 27512
O0 O1 O2 O3 O4 O5 O6 O7
11 12 13 15 16 17 18 19
AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7
Figure A
CRYSTAL
C1
C2
R
16 MHz 24 MHz 33 MHz 40 MHz
30P 15P 10P 5P
30P 15P 10P 5P
6.8K 4.7K
Above table shows the reference values for crystal applications (full gain).
Note: C1, C2, R components refer to Figure A.
- 18 -
W78E52C/W78E052C
Typical Application Circuits, continued
9.2 Expanded External Data Memory and Oscillator
V DD V DD 31 19 10 u OSCILLATOR 18 8.2 K 9 12 13 14 15 1 2 3 4 5 6 7 8 RST INT0 INT1 T0 T1 P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 W78E52B EA XTAL1 XTAL2 P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7 P2.0 P2.1 P2.2 P2.3 P2.4 P2.5 P2.6 P2.7 RD WR PSEN ALE TXD RXD 39 38 37 36 35 34 33 32 21 22 23 24 25 26 27 28 17 16 29 30 11 10 AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 A8 A9 A10 A11 A12 A13 A14 AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 GND 3 4 7 8 13 14 17 18 1 11 D0 D1 D2 D3 D4 D5 D6 D7 OC G 74373 Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 2 5 6 9 12 15 16 19 A0 A1 A2 A3 A4 A5 A6 A7 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 GND 10 9 8 7 6 5 4 3 25 24 21 23 2 26 1 20 22 27 A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 CE OE WR 20256 D0 D1 D2 D3 D4 D5 D6 D7 11 12 13 15 16 17 18 19 AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7
Figure B
- 19 -
Publication Release Date: November 6, 2006 Revision A4
W78E52C/W78E052C
10. PACKAGE DIMENSIONS
10.1 40-pin DIP
Symbol
Dimension in inch Dimension in mm Min. Nom. Max. Min. Nom. Max.
0.210 0.010 0.150 0.016 0.048 0.008 0.155 0.018 0.050 0.010 2.055 0.590 0.540 0.090 0.120 0 0.630 0.650 0.600 0.545 0.100 0.130 0.160 0.022 0.054 0.014 2.070 0.610 14.986 0.550 0.110 0.140 15 0.670 0.090 13.72 2.286 3.048 0 16.00 16.51 0.254 3.81 0.406 1.219 0.203 3.937 0.457 1.27 0.254 52.20 15.24 13.84 2.54 3.302 4.064 0.559 1.372 0.356 52.58 15.494 13.97 2.794 3.556 15 17.01 2.286 5.334
D 40 21
E1
A A1 A2 B B1 c D E E1 e1 L
a
1 S
20 E c
eA S
Notes:
A A2
A1
Base Plane Seating Plane
L B B1
e1
a
eA
1. Dimension D Max. & S include mold flash or tie bar burrs. 2. Dimension E1 does not include interlead flash. 3. Dimension D & E1 include mold mismatch and . are determined at the mold parting line. 4. Dimension B1 does not include dambar protrusion/intrusion. 5. Controlling dimension: Inches. 6. General appearance spec. should be based on final visual inspection spec.
10.2 44-pin PLCC
HD D
6 1 44 40
Symbol
7 39
Dimension in inch Dimension in mm Min. Nom. Max. Min. Nom. Max.
0.185 0.020 0.145 0.026 0.016 0.008 0.648 0.648 0.150 0.028 0.018 0.010 0.653 0.653 0.155 0.032 0.022 0.014 0.658 0.658 0.508 3.683 0.66 0.406 0.203 16.46 16.46 3.81 0.711 0.457 0.254 16.59 16.59 3.937 0.813 0.559 0.356 16.71 16.71 4.699
E
HE
GE
17
29
18
28
c
A A1 A2 b1 b c D E e GD GE HD HE L y
Notes:
0.050 0.590 0.590 0.680 0.680 0.090
BSC 0.630 0.630 0.700 0.700 0.110 0.004
1.27 14.99 14.99 17.27 17.27 2.296
BSC 16.00 16.00 17.78 17.78 2.794 0.10
0.610 0.610 0.690 0.690 0.100
15.49 15.49 17.53 17.53 2.54
L A2 A
e
Seating Plane GD
b b1
A1 y
1. Dimension D & E do not include interlead flash. 2. Dimension b1 does not include dambar protrusion/intrusion. 3. Controlling dimension: Inches 4. General appearance spec. should be based on final visual inspection spec.
- 20 -
W78E52C/W78E052C
Package Dimensions, continued
10.3 44-pin PQFP
HD D
Dimension in inch
Dimension in mm
Symbol
44 34
Min. Nom. Max.
--0.002 0.075 0.01 0.004 0.390 0.390 0.025 0.510 0.510 0.025 0.051 --0.01 0.081 0.014 0.006 0.394 0.394 0.031 0.520 0.520 0.031 0.063 --0.02 0.087 0.018 0.010 0.398 0.398 0.036 0.530 0.530 0.037 0.075 0.003 0 7
Min. Nom.
--0.05 1.90 0.25 0.101 9.9 9.9 0.635 12.95 12.95 0.65 1.295 --0.25 2.05 0.35 0.152 10.00 10.00 0.80 13.2 13.2 0.8 1.6
Max.
--0.5 2.20 0.45 0.254 10.1 10.1 0.952 13.45 13.45 0.95 1.905 0.08
1
33
E HE
11
12
e
b
22
A A1 A2 b c D E e HD HE L L1 y
Notes:
c
0
7
A2 A A1 y L L
1
Seating Plane
See Detail F
1. Dimension D & E do not include interlead flash. 2. Dimension b does not include dambar protrusion/intrusion. 3. Controlling dimension: Millimeter 4. General appearance spec. should be based on final visual inspection spec.
Detail F
- 21 -
Publication Release Date: November 6, 2006 Revision A4
W78E52C/W78E052C
11. REVISION HISTORY
VERSION DATE PAGE DESCRIPTION
A1 A2 A3 A4
Nov. 26, 2004 April 20, 2005 May 11, 2005 November 6, 2006
23 2
Initial issued Add Important Notice Add Lead Free (RoHS) parts Remove block diagram
2
Remove all Leaded parts
Important Notice
Winbond products are not designed, intended, authorized or warranted for use as components in systems or equipment intended for surgical implantation, atomic energy control instruments, airplane or spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments, or for other applications intended to support or sustain life. Further more, Winbond products are not intended for applications wherein failure of Winbond products could result or lead to a situation wherein personal injury, death or severe property or environmental damage could occur. Winbond customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Winbond for any damages resulting from such improper use or sales.
- 22 -

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