Part Name
         Description
M25P20

 2 Mbit, Low Voltage, Serial Flash Memory With 40MHz SPI Bus Interface ( 50 Page)


STMICROELECTRONICS
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M25P20
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List of figures
Figure 1.
Logic Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 2.
SO and VFQFPN Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Figure 3.
Bus Master and memory devices on the SPI Bus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Figure 4.
SPI modes supported . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 5.
Hold Condition Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 6.
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 7.
Write Enable (WREN) Instruction Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 8.
Write Disable (WRDI) Instruction Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 9.
Read Identification (RDID) Instruction Sequence and Data-Out Sequence . . . . . . . . . . . . 19
Figure 10.
Read Status Register (RDSR) Instruction Sequence and Data-Out Sequence . . . . . . . . . 21
Figure 11.
Write Status Register (WRSR) Instruction Sequence. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 12.
Read Data Bytes (READ) instruction sequence and data-out sequence . . . . . . . . . . . . . . 24
Figure 13.
Read Data Bytes at Higher Speed (FAST_READ) Instruction Sequence
and Data-Out Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Figure 14.
Page Program (PP) Instruction Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Figure 15.
Sector Erase (SE) Instruction Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Figure 16.
Bulk Erase (BE) Instruction Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Figure 17.
Deep Power-down (DP) Instruction Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Figure 18.
Release from Deep Power-down and Read Electronic Signature (RES) Instruction
Sequence and Data-Out Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Figure 19.
Release from Deep Power-down (RES) Instruction Sequence . . . . . . . . . . . . . . . . . . . . . 32
Figure 20.
Power-up Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Figure 21.
AC Measurement I/O Waveform. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 22.
Serial Input Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Figure 23.
Write Protect Setup and Hold Timing during WRSR when SRWD=1 . . . . . . . . . . . . . . . . . 43
Figure 24.
Hold Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 25.
Output Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Figure 26.
SO8 narrow – 8 lead Plastic Small Outline, 150 mils body width, Package Outline . . . . . . 45
Figure 27.
VFQFPN8 (MLP8) 8-lead Very thin Fine Pitch Quad Flat Package No lead,
6x5mm, Package Outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
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