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M45PE40
4 Mbit, Low Voltage, Page-Erasable Serial Flash Memory With Byte-Alterability and a 33 MHz SPI Bus Interface
FEATURES SUMMARY

4Mbit of Page-Erasable Flash Memory Page Write (up to 256 Bytes) in 11ms (typical) Page Program (up to 256 Bytes) in 1.2ms (typical) Page Erase (256 Bytes) in 10ms (typical) Sector Erase (512 Kbit) 2.7 to 3.6V Single Supply Voltage SPI Bus Compatible Serial Interface 33MHz Clock Rate (maximum) Deep Power-down Mode 1A (typical) Electronic Signature - JEDEC Standard Two-Byte Signature (4013h) More than 100000 Write Cycles More than 20 Year Data Retention Packages - ECOPACK(R) (RoHS compliant)
Figure 1. Packages
VDFPN8 (MP) 6x5mm (MLP8)
8 1
SO8W (MW) 208 mils width
October 2005
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TABLE OF CONTENTS
FEATURES SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 SIGNAL DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Serial Data Output (Q) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Serial Data Input (D) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Serial Clock (C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Chip Select (S) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Reset (Reset). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Write Protect (W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 SPI MODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 OPERATING FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Sharing the Overhead of Modifying Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 An Easy Way to Modify Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 A Fast Way to Modify Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Polling During a Write, Program or Erase Cycle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Active Power, Standby Power and Deep Power-Down Modes . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 WIP bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 WEL bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Protection Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 MEMORY ORGANIZATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Write Enable (WREN) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Write Disable (WRDI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Read Identification (RDID) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Read Status Register (RDSR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 WIP bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 WEL bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Read Data Bytes (READ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Read Data Bytes at Higher Speed (FAST_READ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Page Write (PW) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Page Program (PP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Page Erase (PE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Sector Erase (SE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Deep Power-down (DP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Release from Deep Power-down (RDP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 POWER-UP AND POWER-DOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
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INITIAL DELIVERY STATE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 MAXIMUM RATING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 DC AND AC PARAMETERS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 PACKAGE MECHANICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 PART NUMBERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 REVISION HISTORY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
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SUMMARY DESCRIPTION
The M45PE40 is a 4Mbit (512K x 8 bit) Serial Paged Flash Memory accessed by a high speed SPI-compatible bus. The memory can be written or programmed 1 to 256 bytes at a time, using the Page Write or Page Program instruction. The Page Write instruction consists of an integrated Page Erase cycle followed by a Page Program cycle. The memory is organized as 8 sectors, each containing 256 pages. Each page is 256 bytes wide. Thus, the whole memory can be viewed as consisting of 2048 pages, or 524288 bytes. The memory can be erased a page at a time, using the Page Erase instruction, or a sector at a time, using the Sector Erase instruction. In order to meet environmental requirements, ST offers these devices in ECOPACK(R) packages. ECOPACK(R) packages are Lead-free and RoHS compliant. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com. Figure 2. Logic Diagram
VCC
Table 1. Signal Names
C D Q Serial Clock Serial Data Input Serial Data Output Chip Select Write Protect Reset Supply Voltage Ground
S
W Reset VCC VSS
Figure 3. VDFPN and SO Connections
M45PE40 D C Reset S 1 2 3 4 8 7 6 5
AI04041D
Q VSS VCC W
D C S W Reset M45PE40
Q
Note: 1. There is an exposed die paddle on the underside of the MLP8 package. This is pulled, internally, to VSS, and must not be allowed to be connected to any other voltage or signal line on the PCB. 2. See PACKAGE MECHANICAL section for package dimensions, and how to identify pin-1.
VSS
AI04040C
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SIGNAL DESCRIPTION
Serial Data Output (Q). This output signal is used to transfer data serially out of the device. Data is shifted out on the falling edge of Serial Clock (C). Serial Data Input (D). This input signal is used to transfer data serially into the device. It receives instructions, addresses, and the data to be programmed. Values are latched on the rising edge of Serial Clock (C). Serial Clock (C). This input signal provides the timing of the serial interface. Instructions, addresses, or data present at Serial Data Input (D) are latched on the rising edge of Serial Clock (C). Data on Serial Data Output (Q) changes after the falling edge of Serial Clock (C). Chip Select (S). When this input signal is High, the device is deselected and Serial Data Output (Q) is at high impedance. Unless an internal Read, Program, Erase or Write cycle is in progress, the device will be in the Standby Power mode (this is not the Deep Power-down mode). Driving Chip Select (S) Low selects the device, placing it in the Active Power mode. After Power-up, a falling edge on Chip Select (S) is required prior to the start of any instruction. Reset (Reset). The Reset (Reset) input provides a hardware reset for the memory. In this mode, the outputs are high impedance. When Reset (Reset) is driven High, the memory is in the normal operating mode. When Reset (Reset) is driven Low, the memory will enter the Reset mode, provided that no internal operation is currently in progress. Driving Reset (Reset) Low while an internal operation is in progress has no effect on that internal operation (a write cycle, program cycle, or erase cycle). Write Protect (W). This input signal puts the device in the Hardware Protected mode, when Write Protect (W) is connected to VSS, causing the first 256 pages of memory to become read-only by protecting them from write, program and erase operations. When Write Protect (W) is connected to VCC, the first 256 pages of memory behave like the other pages of memory.
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SPI MODES
These devices can be driven by a microcontroller with its SPI peripheral running in either of the two following modes: - CPOL=0, CPHA=0 - CPOL=1, CPHA=1 For these two modes, input data is latched in on the rising edge of Serial Clock (C), and output data is available from the falling edge of Serial Clock (C). The difference between the two modes, as shown in Figure 5., is the clock polarity when the bus master is in Stand-by mode and not transferring data: - C remains at 0 for (CPOL=0, CPHA=0) - C remains at 1 for (CPOL=1, CPHA=1)
Figure 4. Bus Master and Memory Devices on the SPI Bus
SDO SPI Interface with (CPOL, CPHA) = (0, 0) or (1, 1) SDI SCK CQD Bus Master (ST6, ST7, ST9, ST10, Others) SPI Memory Device CS3 CS2 CS1 S W RP S W RP S W RP SPI Memory Device SPI Memory Device CQD CQD
AI04043B
Note: The Write Protect (W) signal should be driven, High or Low as appropriate.
Figure 5. SPI Modes Supported
CPOL
CPHA C
0
0
1
1
C
D
MSB
Q
MSB
AI01438B
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OPERATING FEATURES
Sharing the Overhead of Modifying Data To write or program one (or more) data bytes, two instructions are required: Write Enable (WREN), which is one byte, and a Page Write (PW) or Page Program (PP) sequence, which consists of four bytes plus data. This is followed by the internal cycle (of duration tPW or tPP). To share this overhead, the Page Write (PW) or Page Program (PP) instruction allows up to 256 bytes to be programmed (changing bits from 1 to 0) or written (changing bits to 0 or 1) at a time, provided that they lie in consecutive addresses on the same page of memory. An Easy Way to Modify Data The Page Write (PW) instruction provides a convenient way of modifying data (up to 256 contiguous bytes at a time), and simply requires the start address, and the new data in the instruction sequence. The Page Write (PW) instruction is entered by driving Chip Select (S) Low, and then transmitting the instruction byte, three address bytes (A23-A0) and at least one data byte, and then driving Chip Select (S) High. While Chip Select (S) is being held Low, the data bytes are written to the data buffer, starting at the address given in the third address byte (A7-A0). When Chip Select (S) is driven High, the Write cycle starts. The remaining, unchanged, bytes of the data buffer are automatically loaded with the values of the corresponding bytes of the addressed memory page. The addressed memory page then automatically put into an Erase cycle. Finally, the addressed memory page is programmed with the contents of the data buffer. All of this buffer management is handled internally, and is transparent to the user. The user is given the facility of being able to alter the contents of the memory on a byte-by-byte basis. For optimized timings, it is recommended to use the Page Write (PW) instruction to write all consecutive targeted Bytes in a single sequence versus using several Page Write (PW) sequences with each containing only a few Bytes (see Page Write (PW) and AC Characteristics (33MHz operation)). A Fast Way to Modify Data The Page Program (PP) instruction provides a fast way of modifying data (up to 256 contiguous bytes at a time), provided that it only involves resetting bits to 0 that had previously been set to 1. This might be: - when the designer is programming the device for the first time - when the designer knows that the page has already been erased by an earlier Page Erase (PE) or Sector Erase (SE) instruction. This is useful, for example, when storing a fast stream of data, having first performed the erase cycle when time was available - when the designer knows that the only changes involve resetting bits to 0 that are still set to 1. When this method is possible, it has the additional advantage of minimising the number of unnecessary erase operations, and the extra stress incurred by each page. For optimized timings, it is recommended to use the Page Program (PP) instruction to program all consecutive targeted Bytes in a single sequence versus using several Page Program (PP) sequences with each containing only a few Bytes (see Page Program (PP) and AC Characteristics (33MHz operation)). Polling During a Write, Program or Erase Cycle A further improvement in the write, program or erase time can be achieved by not waiting for the worst case delay (tPW, tPP, tPE, or tSE). The Write In Progress (WIP) bit is provided in the Status Register so that the application program can monitor its value, polling it to establish when the previous cycle is complete. Reset An internal Power On Reset circuit helps protect against inadvertent data writes. Addition protection is provided by driving Reset (Reset) Low during the Power-on process, and only driving it High when VCC has reached the correct voltage level, VCC(min). Active Power, Standby Power and Deep Power-Down Modes When Chip Select (S) is Low, the device is selected, and in the Active Power mode. When Chip Select (S) is High, the device is deselected, but could remain in the Active Power mode until all internal cycles have completed (Program, Erase, Write). The device then goes in to the Standby Power mode. The device consumption drops to ICC1. The Deep Power-down mode is entered when the specific instruction (the Deep Power-down (DP) instruction) is executed. The device consumption drops further to ICC2. The device remains in this
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mode until another specific instruction (the Release from Deep Power-down and Read Electronic Signature (RES) instruction) is executed. All other instructions are ignored while the device is in the Deep Power-down mode. This can be Status Register The Status Register contains two status bits that can be read by the Read Status Register (RDSR) instruction. WIP bit. The Write In Progress (WIP) bit indicates whether the memory is busy with a Write, Program or Erase cycle. WEL bit. The Write Enable Latch (WEL) bit indicates the status of the internal Write Enable Latch. Table 2. Status Register Format
b7 0 0 0 0 0 0 WEL b0 WIP

used as an extra software protection mechanism, when the device is not in active use, to protect the device from inadvertent Write, Program or Erase instructions.
Note: WEL and WIP are volatile read-only bits (WEL is set and reset by specific instructions; WIP is automatically set and reset by the internal logic of the device).
Protection Modes The environments where non-volatile memory devices are used can be very noisy. No SPI device can operate correctly in the presence of excessive noise. To help combat this, the M45PE40 features the following data protection mechanisms: Power On Reset and an internal timer (tPUW) can provide protection against inadvertant changes while the power supply is outside the operating specification. Program, Erase and Write instructions are checked that they consist of a number of clock pulses that is a multiple of eight, before they are accepted for execution.
All instructions that modify data must be preceded by a Write Enable (WREN) instruction to set the Write Enable Latch (WEL) bit. This bit is returned to its reset state by the following events: - Power-up - Reset (RESET) driven Low - Write Disable (WRDI) instruction completion - Page Write (PW) instruction completion - Page Program (PP) instruction completion - Page Erase (PE) instruction completion - Sector Erase (SE) instruction completion The Hardware Protected mode is entered when Write Protect (W) is driven Low, causing the first 256 pages of memory to become read-only. When Write Protect (W) is driven High, the first 256 pages of memory behave like the other pages of memory The Reset (Reset) signal can be driven Low to protect the contents of the memory during any critical time, not just during Power-up and Power-down. In addition to the low power consumption feature, the Deep Power-down mode offers extra software protection from inadvertant Write, Program and Erase instructions while the device is not in active use.
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MEMORY ORGANIZATION
The memory is organized as: 2048 pages (256 bytes each). 524288 bytes (8 bits each) 8 sectors (512 Kbits, 65536 bytes each) Each page can be individually: - programmed (bits are programmed from 1 to 0) - erased (bits are erased from 0 to 1) - written (bits are changed to either 0 or 1) The device is Page or Sector Erasable (bits are erased from 0 to 1). Table 3. Memory Organization
Sector 7 6 5 4 3 2 1 0 Address Range 70000h 60000h 50000h 40000h 30000h 20000h 10000h 00000h 7FFFFh 6FFFFh 5FFFFh 4FFFFh 3FFFFh 2FFFFh 1FFFFh 0FFFFh
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Figure 6. Block Diagram
Reset W S C D Q Control Logic High Voltage Generator
I/O Shift Register
Address Register and Counter
256 Byte Data Buffer
Status Register
7FFFFh
Y Decoder
10000h First 256 Pages can be made read-only 00000h 256 Bytes (Page Size) X Decoder 000FFh
AI04042B
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INSTRUCTIONS
All instructions, addresses and data are shifted in and out of the device, most significant bit first. Serial Data Input (D) is sampled on the first rising edge of Serial Clock (C) after Chip Select (S) is driven Low. Then, the one-byte instruction code must be shifted in to the device, most significant bit first, on Serial Data Input (D), each bit being latched on the rising edges of Serial Clock (C). The instruction set is listed in Table 4.. Every instruction sequence starts with a one-byte instruction code. Depending on the instruction, this might be followed by address bytes, or by data bytes, or by both or none. In the case of a Read Data Bytes (READ), Read Data Bytes at Higher Speed (Fast_Read) or Read Status Register (RDSR) instruction, the shifted-in instruction sequence is followed by a data-out seTable 4. Instruction Set
Instruction WREN WRDI RDID RDSR READ Description Write Enable Write Disable Read Identification Read Status Register Read Data Bytes One-byte Instruction Code 0000 0110 0000 0100 1001 1111 0000 0101 0000 0011 0000 1011 0000 1010 0000 0010 1101 1011 1101 1000 1011 1001 1010 1011 06h 04h 9Fh 05h 03h 0Bh 0Ah 02h DBh D8h B9h ABh Address Bytes 0 0 0 0 3 3 3 3 3 3 0 0 Dummy Bytes 0 0 0 0 0 1 0 0 0 0 0 0 Data Bytes 0 0 1 to 3 1 to 1 to 1 to 1 to 256 1 to 256 0 0 0 0
quence. Chip Select (S) can be driven High after any bit of the data-out sequence is being shifted out. In the case of a Page Write (PW), Page Program (PP), Page Erase (PE), Sector Erase (SE), Write Enable (WREN), Write Disable (WRDI), Deep Power-down (DP) or Release from Deep Powerdown (RDP) instruction, Chip Select (S) must be driven High exactly at a byte boundary, otherwise the instruction is rejected, and is not executed. That is, Chip Select (S) must driven High when the number of clock pulses after Chip Select (S) being driven Low is an exact multiple of eight. All attempts to access the memory array during a Write cycle, Program cycle or Erase cycle are ignored, and the internal Write cycle, Program cycle or Erase cycle continues unaffected.
FAST_READ Read Data Bytes at Higher Speed PW PP PE SE DP RDP Page Write Page Program Page Erase Sector Erase Deep Power-down Release from Deep Power-down
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Write Enable (WREN) The Write Enable (WREN) instruction (Figure 7.) sets the Write Enable Latch (WEL) bit. The Write Enable Latch (WEL) bit must be set prior to every Page Write (PW), Page Program (PP), Page Erase (PE), and Sector Erase (SE) instruction. The Write Enable (WREN) instruction is entered by driving Chip Select (S) Low, sending the instruction code, and then driving Chip Select (S) High.
Figure 7. Write Enable (WREN) Instruction Sequence
S 0 C Instruction D High Impedance Q
AI02281E
1
2
3
4
5
6
7
Write Disable (WRDI) The Write Disable (WRDI) instruction (Figure 8.) resets the Write Enable Latch (WEL) bit. The Write Disable (WRDI) instruction is entered by driving Chip Select (S) Low, sending the instruction code, and then driving Chip Select (S) High. The Write Enable Latch (WEL) bit is reset under the following conditions:
- - - - - -
Power-up Write Disable (WRDI) instruction completion Page Write (PW) instruction completion Page Program (PP) instruction completion Page Erase (PE) instruction completion Sector Erase (SE) instruction completion
Figure 8. Write Disable (WRDI) Instruction Sequence
S 0 C Instruction D High Impedance Q
AI03750D
1
2
3
4
5
6
7
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Read Identification (RDID) The Read Identification (RDID) instruction allows the 8-bit manufacturer identification to be read, followed by two bytes of device identification. The manufacturer identification is assigned by JEDEC, and has the value 20h for STMicroelectronics. The device identification is assigned by the device manufacturer, and indicates the memory type in the first byte (40h), and the memory capacity of the device in the second byte (13h). Any Read Identification (RDID) instruction while an Erase or Program cycle is in progress, is not decoded, and has no effect on the cycle that is in progress. The device is first selected by driving Chip Select (S) Low. Then, the 8-bit instruction code for the instruction is shifted in. This is followed by the 24-bit device identification, stored in the memory, being shifted out on Serial Data Output (Q), each bit being shifted out during the falling edge of Serial Clock (C). The instruction sequence is shown in Figure 9.. The Read Identification (RDID) instruction is terminated by driving Chip Select (S) High at any time during data output. When Chip Select (S) is driven High, the device is put in the Standby Power mode. Once in the Standby Power mode, the device waits to be selected, so that it can receive, decode and execute instructions.
Table 5. Read Identification (RDID) Data-Out Sequence
Device Identification Manufacturer Identification Memory Type 20h 40h Memory Capacity 13h
Figure 9. Read Identification (RDID) Instruction Sequence and Data-Out Sequence
S 0 C Instruction D Manufacturer Identification High Impedance Q MSB 15 14 13 MSB
AI06809b
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15 16 17 18
28 29 30 31
Device Identification 3 2 1 0
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Read Status Register (RDSR) The Read Status Register (RDSR) instruction allows the Status Register to be read. The Status Register may be read at any time, even while a Program, Erase or Write cycle is in progress. When one of these cycles is in progress, it is recommended to check the Write In Progress (WIP) bit before sending a new instruction to the device. It is also possible to read the Status Register continuously, as shown in Figure 10.. The status bits of the Status Register are as follows: WIP bit. The Write In Progress (WIP) bit indicates whether the memory is busy with a Write, Program or Erase cycle. When set to 1, such a cycle is in progress, when reset to 0 no such cycle is in progress. WEL bit. The Write Enable Latch (WEL) bit indicates the status of the internal Write Enable Latch. When set to 1 the internal Write Enable Latch is set, when set to 0 the internal Write Enable Latch is reset and no Write, Program or Erase instruction is accepted.
Figure 10. Read Status Register (RDSR) Instruction Sequence and Data-Out Sequence
S 0 C Instruction D Status Register Out High Impedance Q 7 MSB 6 5 4 3 2 1 0 7 MSB
AI02031E
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
Status Register Out 6 5 4 3 2 1 0 7
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Read Data Bytes (READ) The device is first selected by driving Chip Select (S) Low. The instruction code for the Read Data Bytes (READ) instruction is followed by a 3-byte address (A23-A0), each bit being latched-in during the rising edge of Serial Clock (C). Then the memory contents, at that address, is shifted out on Serial Data Output (Q), each bit being shifted out, at a maximum frequency fR, during the falling edge of Serial Clock (C). The instruction sequence is shown in Figure 11.. The first byte addressed can be at any location. The address is automatically incremented to the next higher address after each byte of data is shifted out. The whole memory can, therefore, be read with a single Read Data Bytes (READ) instruction. When the highest address is reached, the address counter rolls over to 000000h, allowing the read sequence to be continued indefinitely. The Read Data Bytes (READ) instruction is terminated by driving Chip Select (S) High. Chip Select (S) can be driven High at any time during data output. Any Read Data Bytes (READ) instruction, while an Erase, Program or Write cycle is in progress, is rejected without having any effects on the cycle that is in progress.
Figure 11. Read Data Bytes (READ) Instruction Sequence and Data-Out Sequence
S 0 C Instruction 24-Bit Address 1 2 3 4 5 6 7 8 9 10 28 29 30 31 32 33 34 35 36 37 38 39
D High Impedance Q
23 22 21 MSB
3
2
1
0 Data Out 1 7 6 5 4 3 2 1 0 Data Out 2 7
MSB
AI03748D
Note: Address bits A23 to A19 are Don't Care.
15/35
M45PE40
Read Data Bytes at Higher Speed (FAST_READ) The device is first selected by driving Chip Select (S) Low. The instruction code for the Read Data Bytes at Higher Speed (FAST_READ) instruction is followed by a 3-byte address (A23-A0) and a dummy byte, each bit being latched-in during the rising edge of Serial Clock (C). Then the memory contents, at that address, is shifted out on Serial Data Output (Q), each bit being shifted out, at a maximum frequency fC, during the falling edge of Serial Clock (C). The instruction sequence is shown in Figure 12.. The first byte addressed can be at any location. The address is automatically incremented to the next higher address after each byte of data is shifted out. The whole memory can, therefore, be read with a single Read Data Bytes at Higher Speed (FAST_READ) instruction. When the highest address is reached, the address counter rolls over to 000000h, allowing the read sequence to be continued indefinitely. The Read Data Bytes at Higher Speed (FAST_READ) instruction is terminated by driving Chip Select (S) High. Chip Select (S) can be driven High at any time during data output. Any Read Data Bytes at Higher Speed (FAST_READ) instruction, while an Erase, Program or Write cycle is in progress, is rejected without having any effects on the cycle that is in progress.
Figure 12. Read Data Bytes at Higher Speed (FAST_READ) Instruction Sequence and Data-Out Sequence
S 0 C Instruction 24 BIT ADDRESS 1 2 3 4 5 6 7 8 9 10 28 29 30 31
D High Impedance Q
23 22 21
3
2
1
0
S 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 C Dummy Byte
D
7
6
5
4
3
2
1
0 DATA OUT 1 DATA OUT 2 1 0 7 MSB 6 5 4 3 2 1 0 7 MSB
AI04006
Q
7 MSB
6
5
4
3
2
Note: Address bits A23 to A19 are Don't Care.
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M45PE40
Page Write (PW) The Page Write (PW) instruction allows bytes to be written in the memory. Before it can be accepted, a Write Enable (WREN) instruction must previously have been executed. After the Write Enable (WREN) instruction has been decoded, the device sets the Write Enable Latch (WEL). The Page Write (PW) instruction is entered by driving Chip Select (S) Low, followed by the instruction code, three address bytes and at least one data byte on Serial Data Input (D). The rest of the page remains unchanged if no power failure occurs during this write cycle. The Page Write (PW) instruction performs a page erase cycle even if only one byte is updated. If the 8 least significant address bits (A7-A0) are not all zero, all transmitted data exceeding the addressed page boundary wrap round, and are written from the start address of the same page (the one whose 8 least significant address bits (A7-A0) are all zero). Chip Select (S) must be driven Low for the entire duration of the sequence. The instruction sequence is shown in Figure 13.. If more than 256 bytes are sent to the device, previously latched data are discarded and the last 256 data bytes are guaranteed to be written correctly within the same page. If less than 256 Data bytes are sent to device, they are correctly written at the Figure 13. Page Write (PW) Instruction Sequence
S 0 C Instruction 24-Bit Address Data Byte 1 1 2 3 4 5 6 7 8 9 10 28 29 30 31 32 33 34 35 36 37 38 39
requested addresses without having any effects on the other bytes of the same page. For optimized timings, it is recommended to use the Page Write (PW) instruction to write all consecutive targeted Bytes in a single sequence versus using several Page Write (PW) sequences with each containing only a few Bytes (see AC Characteristics (33MHz operation)). Chip Select (S) must be driven High after the eighth bit of the last data byte has been latched in, otherwise the Page Write (PW) instruction is not executed. As soon as Chip Select (S) is driven High, the selftimed Page Write cycle (whose duration is tPW) is initiated. While the Page Write cycle is in progress, the Status Register may be read to check the value of the Write In Progress (WIP) bit. The Write In Progress (WIP) bit is 1 during the self-timed Page Write cycle, and is 0 when it is completed. At some unspecified time before the cycle is complete, the Write Enable Latch (WEL) bit is reset. A Page Write (PW) instruction applied to a page that is Hardware Protected is not executed. Any Page Write (PW) instruction, while an Erase, Program or Write cycle is in progress, is rejected without having any effects on the cycle that is in progress.
D
23 22 21 MSB
3
2
1
0
7
6
5
4
3
2
1
0
MSB
S 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 C Data Byte 2 Data Byte 3 Data Byte n
D
7
6
5
4
3
2
1
0
7 MSB
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
MSB
MSB
AI04045
Note: 1. Address bits A23 to A19 are Don't Care 2. 1 n 256
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M45PE40
Page Program (PP) The Page Program (PP) instruction allows bytes to be programmed in the memory (changing bits from 1 to 0, only). Before it can be accepted, a Write Enable (WREN) instruction must previously have been executed. After the Write Enable (WREN) instruction has been decoded, the device sets the Write Enable Latch (WEL). The Page Program (PP) instruction is entered by driving Chip Select (S) Low, followed by the instruction code, three address bytes and at least one data byte on Serial Data Input (D). If the 8 least significant address bits (A7-A0) are not all zero, all transmitted data exceeding the addressed page boundary wrap round, and are programmed from the start address of the same page (the one whose 8 least significant address bits (A7-A0) are all zero). Chip Select (S) must be driven Low for the entire duration of the sequence. The instruction sequence is shown in Figure 14.. If more than 256 bytes are sent to the device, previously latched data are discarded and the last 256 data bytes are guaranteed to be programmed correctly within the same page. If less than 256 Data bytes are sent to device, they are correctly programmed at the requested addresses without having any effects on the other bytes of the same page. For optimized timings, it is recommended to use the Page Program (PP) instruction to program all consecutive targeted Bytes in a single sequence versus using several Page Program (PP) sequences with each containing only a few Bytes (see AC Characteristics (33MHz operation)). Chip Select (S) must be driven High after the eighth bit of the last data byte has been latched in, otherwise the Page Program (PP) instruction is not executed. As soon as Chip Select (S) is driven High, the selftimed Page Program cycle (whose duration is tPP) is initiated. While the Page Program cycle is in progress, the Status Register may be read to check the value of the Write In Progress (WIP) bit. The Write In Progress (WIP) bit is 1 during the selftimed Page Program cycle, and is 0 when it is completed. At some unspecified time before the cycle is complete, the Write Enable Latch (WEL) bit is reset. A Page Program (PP) instruction applied to a page that is Hardware Protected is not executed. Any Page Program (PP) instruction, while an Erase, Program or Write cycle is in progress, is rejected without having any effects on the cycle that is in progress.
Figure 14. Page Program (PP) Instruction Sequence
S 0 C Instruction 24-Bit Address Data Byte 1 1 2 3 4 5 6 7 8 9 10 28 29 30 31 32 33 34 35 36 37 38 39
D
23 22 21 MSB
3
2
1
0
7
6
5
4
3
2
1
0
MSB
S 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 C Data Byte 2 Data Byte 3 Data Byte n
D
7
6
5
4
3
2
1
0
7 MSB
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
MSB
MSB
AI04044
Note: 1. Address bits A23 to A19 are Don't Care 2. 1 n 256
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M45PE40
Page Erase (PE) The Page Erase (PE) instruction sets to 1 (FFh) all bits inside the chosen page. Before it can be accepted, a Write Enable (WREN) instruction must previously have been executed. After the Write Enable (WREN) instruction has been decoded, the device sets the Write Enable Latch (WEL). The Page Erase (PE) instruction is entered by driving Chip Select (S) Low, followed by the instruction code, and three address bytes on Serial Data Input (D). Any address inside the Page is a valid address for the Page Erase (PE) instruction. Chip Select (S) must be driven Low for the entire duration of the sequence. The instruction sequence is shown in Figure 15.. Chip Select (S) must be driven High after the eighth bit of the last address byte has been latched Figure 15. Page Erase (PE) Instruction Sequence in, otherwise the Page Erase (PE) instruction is not executed. As soon as Chip Select (S) is driven High, the self-timed Page Erase cycle (whose duration is tPE) is initiated. While the Page Erase cycle is in progress, the Status Register may be read to check the value of the Write In Progress (WIP) bit. The Write In Progress (WIP) bit is 1 during the self-timed Page Erase cycle, and is 0 when it is completed. At some unspecified time before the cycle is complete, the Write Enable Latch (WEL) bit is reset. A Page Erase (PE) instruction applied to a page that is Hardware Protected is not executed. Any Page Erase (PE) instruction, while an Erase, Program or Write cycle is in progress, is rejected without having any effects on the cycle that is in progress.
S 0 C Instruction 24 Bit Address 1 2 3 4 5 6 7 8 9 29 30 31
D
23 22 MSB
2
1
0
AI04046
Note: Address bits A23 to A19 are Don't Care.
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M45PE40
Sector Erase (SE) The Sector Erase (SE) instruction sets to 1 (FFh) all bits inside the chosen sector. Before it can be accepted, a Write Enable (WREN) instruction must previously have been executed. After the Write Enable (WREN) instruction has been decoded, the device sets the Write Enable Latch (WEL). The Sector Erase (SE) instruction is entered by driving Chip Select (S) Low, followed by the instruction code, and three address bytes on Serial Data Input (D). Any address inside the Sector (see Table 3.) is a valid address for the Sector Erase (SE) instruction. Chip Select (S) must be driven Low for the entire duration of the sequence. The instruction sequence is shown in Figure 16.. Chip Select (S) must be driven High after the eighth bit of the last address byte has been latched in, otherwise the Sector Erase (SE) instruction is Figure 16. Sector Erase (SE) Instruction Sequence not executed. As soon as Chip Select (S) is driven High, the self-timed Sector Erase cycle (whose duration is tSE) is initiated. While the Sector Erase cycle is in progress, the Status Register may be read to check the value of the Write In Progress (WIP) bit. The Write In Progress (WIP) bit is 1 during the self-timed Sector Erase cycle, and is 0 when it is completed. At some unspecified time before the cycle is complete, the Write Enable Latch (WEL) bit is reset. A Sector Erase (SE) instruction applied to a sector that contains a page that is Hardware Protected is not executed. Any Sector Erase (SE) instruction, while an Erase, Program or Write cycle is in progress, is rejected without having any effects on the cycle that is in progress.
S 0 C Instruction 24 Bit Address 1 2 3 4 5 6 7 8 9 29 30 31
D
23 22 MSB
2
1
0
AI03751D
Note: Address bits A23 to A19 are Don't Care.
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M45PE40
Deep Power-down (DP) Executing the Deep Power-down (DP) instruction is the only way to put the device in the lowest consumption mode (the Deep Power-down mode). It can also be used as an extra software protection mechanism, while the device is not in active use, since in this mode, the device ignores all Write, Program and Erase instructions. Driving Chip Select (S) High deselects the device, and puts the device in the Standby Power mode (if there is no internal cycle currently in progress). But this mode is not the Deep Power-down mode. The Deep Power-down mode can only be entered by executing the Deep Power-down (DP) instruction, to reduce the standby current (from ICC1 to ICC2, as specified in Table 11.). Once the device has entered the Deep Powerdown mode, all instructions are ignored except the Release from Deep Power-down (RDP) instruction. This releases the device from this mode. The Deep Power-down mode automatically stops at Power-down, and the device always Powers-up in the Standby Power mode. The Deep Power-down (DP) instruction is entered by driving Chip Select (S) Low, followed by the instruction code on Serial Data Input (D). Chip Select (S) must be driven Low for the entire duration of the sequence. The instruction sequence is shown in Figure 17.. Chip Select (S) must be driven High after the eighth bit of the instruction code has been latched in, otherwise the Deep Power-down (DP) instruction is not executed. As soon as Chip Select (S) is driven High, it requires a delay of tDP before the supply current is reduced to ICC2 and the Deep Power-down mode is entered. Any Deep Power-down (DP) instruction, while an Erase, Program or Write cycle is in progress, is rejected without having any effects on the cycle that is in progress.
Figure 17. Deep Power-down (DP) Instruction Sequence
S 0 C Instruction D 1 2 3 4 5 6 7 tDP
Stand-by Mode
Deep Power-down Mode
AI03753D
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M45PE40
Release from Deep Power-down (RDP) Once the device has entered the Deep Powerdown mode, all instructions are ignored except the Release from Deep Power-down (RDP) instruction. Executing this instruction takes the device out of the Deep Power-down mode. The Release from Deep Power-down (RDP) instruction is entered by driving Chip Select (S) Low, followed by the instruction code on Serial Data Input (D). Chip Select (S) must be driven Low for the entire duration of the sequence. The instruction sequence is shown in Figure 18.. The Release from Deep Power-down (RDP) instruction is terminated by driving Chip Select (S) High. Sending additional clock cycles on Serial Clock (C), while Chip Select (S) is driven Low, cause the instruction to be rejected, and not executed. After Chip Select (S) has been driven High, followed by a delay, tRDP, the device is put in the Standby Power mode. Chip Select (S) must remain High at least until this period is over. The device waits to be selected, so that it can receive, decode and execute instructions. Any Release from Deep Power-down (RDP) instruction, while an Erase, Program or Write cycle is in progress, is rejected without having any effects on the cycle that is in progress.
Figure 18. Release from Deep Power-down (RDP) Instruction Sequence
S 0 C Instruction D 1 2 3 4 5 6 7 tRDP
High Impedance Q Deep Power-down Mode Standby Mode
AI06807
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M45PE40
POWER-UP AND POWER-DOWN
At Power-up and Power-down, the device must not be selected (that is Chip Select (S) must follow the voltage applied on VCC) until VCC reaches the correct value: - VCC(min) at Power-up, and then for a further delay of tVSL - VSS at Power-down Usually a simple pull-up resistor on Chip Select (S) can be used to ensure safe and proper Power-up and Power-down. To avoid data corruption and inadvertent write operations during power up, a Power On Reset (POR) circuit is included. The logic inside the device is held reset while VCC is less than the Power On Reset (POR) threshold voltage, VWI - all operations are disabled, and the device does not respond to any instruction. Moreover, the device ignores all Write Enable (WREN), Page Write (PW), Page Program (PP), Page Erase (PE) and Sector Erase (SE) instructions until a time delay of tPUW has elapsed after the moment that VCC rises above the VWI threshold. However, the correct operation of the device is not guaranteed if, by this time, VCC is still below VCC(min). No Write, Program or Erase instructions should be sent until the later of: - tPUW after VCC passed the VWI threshold - tVSL after VCC passed the VCC(min) level These values are specified in Table 6.. Figure 19. Power-up Timing
VCC VCC(max) Program, Erase and Write Commands are Rejected by the Device Chip Selection Not Allowed VCC(min) Reset State of the Device VWI tPUW tVSL Read Access allowed Device fully accessible
If the delay, tVSL, has elapsed, after VCC has risen above VCC(min), the device can be selected for READ instructions even if the tPUW delay is not yet fully elapsed. As an extra protection, the Reset (Reset) signal can be driven Low for the whole duration of the Power-up and Power-down phases. At Power-up, the device is in the following state: - The device is in the Standby Power mode (not the Deep Power-down mode). - The Write Enable Latch (WEL) bit is reset. Normal precautions must be taken for supply rail decoupling, to stabilize the VCC supply. Each device in a system should have the VCC rail decoupled by a suitable capacitor close to the package pins. (Generally, this capacitor is of the order of 0.1F). At Power-down, when VCC drops from the operating voltage, to below the Power On Reset (POR) threshold voltage, VWI, all operations are disabled and the device does not respond to any instruction. (The designer needs to be aware that if a Power-down occurs while a Write, Program or Erase cycle is in progress, some data corruption can result.)
time
AI04009C
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M45PE40
Table 6. Power-Up Timing and VWI Threshold
Symbol tVSL
1
Parameter VCC(min) to S low Time delay before the first Write, Program or Erase instruction Write Inhibit Voltage
Min. 30 1 1.5
Max.
Unit s
tPUW1 VWI1
10 2.5
ms V
Note: 1. These parameters are characterized only, over the temperature range -40C to +85C.
INITIAL DELIVERY STATE
The device is delivered with the memory array erased: all bits are set to 1 (each byte contains FFh). All usable Status Register bits are 0.
MAXIMUM RATING
Stressing the device outside the ratings listed in Table 7. may cause permanent damage to the device. These are stress ratings only, and operation of the device at these, or any other conditions outside those indicated in the Operating sections of Table 7. Absolute Maximum Ratings
Symbol TSTG TLEAD VIO VCC VESD Storage Temperature Lead Temperature during Soldering Input and Output Voltage (with respect to Ground) Supply Voltage Electrostatic Discharge Voltage (Human Body model) 2 Parameter Min. -65 Max. 150 Unit C C V V V
this specification, is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant quality documents.
See note 1 -0.6 -0.6 -2000
ECOPACK(R)
4.0 4.0 2000
Note: 1. Compliant with JEDEC Std J-STD-020C (for small body, Sn-Pb or Pb assembly), the ST the European directive on Restrictions on Hazardous Substances (RoHS) 2002/95/EU 2. JEDEC Std JESD22-A114A (C1=100 pF, R1=1500 , R2=500 )
7191395 specification, and
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M45PE40
DC AND AC PARAMETERS
This section summarizes the operating and measurement conditions, and the DC and AC characteristics of the device. The parameters in the DC and AC Characteristic tables that follow are derived from tests performed under the MeasureTable 8. Operating Conditions
Symbol VCC TA Supply Voltage Ambient Operating Temperature Parameter Min. 2.7 -40 Max. 3.6 85 Unit V C
ment Conditions summarized in the relevant tables. Designers should check that the operating conditions in their circuit match the measurement conditions when relying on the quoted parameters.
Table 9. AC Measurement Conditions
Symbol CL Load Capacitance Input Rise and Fall Times Input Pulse Voltages Input and Output Timing Reference Voltages
Note: Output Hi-Z is defined as the point where data out is no longer driven.
Parameter
Min. 30
Max.
Unit pF
5 0.2VCC to 0.8VCC 0.3VCC to 0.7VCC
ns V V
Figure 20. AC Measurement I/O Waveform
Input Levels 0.8VCC Input and Output Timing Reference Levels 0.7VCC 0.3VCC
AI00825B
0.2VCC
Table 10. Capacitance
Symbol COUT CIN Parameter Output Capacitance (Q) Input Capacitance (other pins) Test Condition VOUT = 0V VIN = 0V Min. Max. 8 6 Unit pF pF
Note: Sampled only, not 100% tested, at TA=25C and a frequency of 20 MHz.
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M45PE40
Table 11. DC Characteristics
Symbol ILI ILO ICC1 ICC2 ICC3 ICC4 ICC5 VIL VIH VOL VOH Parameter Input Leakage Current Output Leakage Current Standby Current (Standby and Reset modes) Deep Power-down Current Operating Current (FAST_READ) Operating Current (PW) Operating Current (SE) Input Low Voltage Input High Voltage Output Low Voltage Output High Voltage IOL = 1.6 mA IOH = -100 A VCC-0.2 S = VCC, VIN = VSS or VCC S = VCC, VIN = VSS or VCC C = 0.1VCC / 0.9.VCC at 25 MHz, Q = open C = 0.1VCC / 0.9.VCC at 33 MHz, Q = open S = VCC S = VCC - 0.5 0.7VCC Test Condition (in addition to those in Table 8.) Min. Max. 2 2 50 10 6 mA 8 15 15 0.3VCC VCC+0.4 0.4 mA mA V V V V Unit A A A A
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M45PE40
Table 12. AC Characteristics (25MHz operation)
Test conditions specified in Table 8. and Table 9. Symbol Alt. Parameter Clock Frequency for the following instructions: FAST_READ, PW, PP, PE, SE, DP, RDP, WREN, WRDI, RDSR Clock Frequency for READ instructions tCLH tCLL Clock High Time Clock Low Time Clock Slew Rate 2 (peak to peak) tSLCH tCHSL tDVCH tCHDX tCHSH tSHCH tSHSL tSHQZ
2
Min.
Typ.
Max.
Unit
fC
fC
D.C.
25
MHz
fR tCH 1 tCL 1
D.C. 18 18 0.03 10 10 5 5 10 10 200
20
MHz ns ns V/ns ns ns ns ns ns ns ns
tCSS
S Active Setup Time (relative to C) S Not Active Hold Time (relative to C)
tDSU tDH
Data In Setup Time Data In Hold Time S Active Hold Time (relative to C) S Not Active Setup Time (relative to C)
tCSH tDIS tV tHO tRST tREC
S Deselect Time Output Disable Time Clock Low to Output Valid Output Hold Time Reset Pulse Width Reset Recovery Time Chip should have been deselected before Reset is de-asserted Write Protect Setup Time Write Protect Hold Time S to Deep Power-down S High to Standby Power mode Page Write Cycle Time (256 Bytes)
15 15 0 10 3 10 50 100 3 30 11 10.2+ n*0.8/256 1.2 0.4+ n*0.8/256 10 1 5 20 5 25
ns ns ns s s ns ns ns s s ms
tCLQV tCLQX tRLRH 2 tRHSL tSHRH tWHSL tSHWL tDP 2 tRDP 2 tPW
(3)
Page Write Cycle Time (n Bytes) Page Program Cycle Time (256 Bytes)
tPP
(3)
Page Program Cycle Time (n Bytes) Page Erase Cycle Time Sector Erase Cycle Time
ms ms s
tPE tSE
Note: 1. tCH + tCL must be greater than or equal to 1/ fC(max) 2. Value guaranteed by characterization, not 100% tested in production. 3. When using PP and PW instructions to update consecutive Bytes, optimized timings are obtained with one sequence including all the Bytes versus several sequences of only a few Bytes. (1 n 256)
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M45PE40
Table 13. AC Characteristics (33MHz operation)
33MHz only available for products marked since week 40 of 2005(4) Test conditions specified in Table 8. and Table 9. Symbol Alt. Parameter Clock Frequency for the following instructions: FAST_READ, PW, PP, PE, SE, DP, RDP, WREN, WRDI, RDSR Clock Frequency for READ instructions tCLH tCLL Clock High Time Clock Low Time Clock Slew Rate 2 (peak to peak) tSLCH tCHSL tDVCH tCHDX tCHSH tSHCH tSHSL tSHQZ (2) tCLQV tCLQX tTHSL tSHTL tDP (2) tRDP (2) tPW (3) tCSH tDIS tV tHO tDSU tDH tCSS S Active Setup Time (relative to C) S Not Active Hold Time (relative to C) Data In Setup Time Data In Hold Time S Active Hold Time (relative to C) S Not Active Setup Time (relative to C) S Deselect Time Output Disable Time Clock Low to Output Valid Output Hold Time Top Sector Lock Setup Time Top Sector Lock Hold Time S to Deep Power-down S High to Standby Power mode Page Write Cycle Time (256 Bytes) Page Write Cycle Time (n Bytes) Page Program Cycle Time (256 Bytes) tPP (3) tPE tSE Page Program Cycle Time (n Bytes) Page Erase Cycle Time Sector Erase Cycle Time 11 10.2+ n*0.8/256 1.2 0.4+ n*0.8/256 10 1 5 ms 25 ms 0 50 100 3 30 Min. Typ. Max. Unit
fC
fC
D.C.
33
MHz
fR tCH (1) tCL (1)
D.C. 13 13 0.03 10 10 3 5 5 5 200
20
MHz ns ns V/ns ns ns ns ns ns ns ns
12 12
ns ns ns ns ns s s
20 5
ms s
Note: 1. tCH + tCL must be greater than or equal to 1/ fC 2. Value guaranteed by characterization, not 100% tested in production. 3. When using PP and PW instructions to update consecutive Bytes, optimized timings are obtained with one sequence including all the Bytes versus several sequences of only a few Bytes. (1 n 256) 4. Details of how to find the date of marking are given in Application Note, AN1995.
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M45PE40
Figure 21. Serial Input Timing
tSHSL S tCHSL C tDVCH tCHDX D MSB IN tCLCH LSB IN tCHCL tSLCH tCHSH tSHCH
Q
High Impedance
AI01447C
Figure 22. Write Protect Setup and Hold Timing
W tWHSL
tSHWL
S
C
D High Impedance Q
AI07439
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M45PE40
Figure 23. Output Timing
S tCH C tCLQV tCLQX Q tQLQH tQHQL D ADDR.LSB IN
AI01449D
tCLQV tCLQX
tCL
tSHQZ
LSB OUT
Figure 24. Reset AC Waveforms
S
tSHRH tRLRH
tRHSL
Reset
AI06808
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M45PE40
PACKAGE MECHANICAL
Figure 25. MLP8, 8-lead Very thin Dual Flat Package No lead, 6x5mm, Package Outline
D D1
E E1
E2
e
b A A2 L D2
A1 A3
VDFPN-01
Note: Drawing is not to scale.
Table 14. MLP8, 8-lead Very thin Dual Flat Package No lead, 6x5mm, Package Mechanical Data
millimeters Symbol Typ. A A1 A2 A3 b D D1 D2 E E1 E2 e L 0.65 0.20 0.40 6.00 5.75 3.40 5.00 4.75 4.00 1.27 0.60 0.50 0.75 12 3.80 4.20 3.20 3.60 0.35 0.48 0.85 0.00 Min. Max. 1.00 0.05 0.0256 0.0079 0.0157 0.2362 0.2264 0.1339 0.1969 0.1870 0.1575 0.0500 0.0236 0.0197 0.0295 12 0.1496 0.1654 0.1260 0.1417 0.0138 0.0189 Typ. 0.0335 0.0000 Min. Max. 0.0394 0.0020 inches
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M45PE40
Figure 26. SO8 wide - 8 lead Plastic Small Outline, 208 mils body width, Package Outline
A2 B e D
A C CP
N
E
1
H A1 L
SO-b
Note: Drawing is not to scale.
Table 15. SO8 wide - 8 lead Plastic Small Outline, 208 mils body width, Mechanical Data
millimeters Symbol Typ A A1 A2 B C CP D E e H L N 1.27 5.15 5.20 - 7.70 0.50 0 8 0.20 0.35 - 0.10 Min Max 2.03 0.25 1.78 0.45 - 0.10 5.35 5.40 - 8.10 0.80 10 0.050 0.203 0.205 - 0.303 0.020 0 8 0.008 0.014 - 0.004 Typ Min Max 0.080 0.010 0.070 0.018 - 0.004 0.211 0.213 - 0.319 0.031 10 inches
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M45PE40
PART NUMBERING
Table 16. Ordering Information Scheme
Example: Device Type M45PE = Page-Erasable Serial Flash Memory Device Function 40 = 4Mbit (512K x 8) Operating Voltage V = VCC = 2.7 to 3.6V Package MW = SO8 (208 mils width) MP = VDFPN8 6x5mm (MLP8) Device Grade 6 = Industrial temperature range, -40 to 85 C. Device tested with standard test flow Option blank = Standard Packing T = Tape and Reel Packing Plating Technology blank = Standard SnPb plating P or G = ECOPACK(R) (RoHS compliant) M45PE40 - V MP 6 T G
For a list of available options (speed, package, etc.) or for further information on any aspect of this device, please contact your nearest ST Sales Office.
The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label.
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M45PE40
REVISION HISTORY
Table 17. Document Revision History
Date 04-Dec-2003 23-Jan-2004 31-Mar-2004 05-Aug-2004 11-Jan-2005 Version 1.2 2.0 3.0 4.0 5.0 First public release SO16 pin-out corrected Soldering temperature information clarified for RoHS compliant devices. Device grade information clarified Device grade information further clarified Document promoted to Mature Datasheet. Minor wording changes. Notes 1 and 2 removed from Table 16., Ordering Information Scheme. SO16 package removed and SO8 wide package added. Added AC Characteristics (33MHz operation). An Easy Way to Modify Data, A Fast Way to Modify Data, Page Write (PW) and Page Program (PP) sections updated to explain optimal use of Page Write and Page Program instructions. Updated ICC3 values in Table 11., DC Characteristics. Updated Table 16., Ordering Information Scheme. Ecopack(R) information added. Description of Revision
4-Oct-2005
6.0
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M45PE40
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. ECOPACK is a registered trademark of STMicroelectronics. All other names are the property of their respective owners (c) 2005 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America www.st.com
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