Document
W25X10AL, W25X20AL, W25X40AL, W25X80AL
1M-BIT, 2M-BIT, 4M-BIT AND 8M-BIT 2.5V SERIAL FLASH MEMORY WITH 4KB SECTORS AND DUAL OUTPUT SPI
Publication Release Date: October 7 2009
-1-
Revision D
W25X10AL, W25X20AL, W25X40AL, W25X80AL
Table of Contents
1. GENERAL DESCRIPTION.......................................................................................................... 4
2. FEATURES ................................................................................................................................. 4
3. PIN CONFIGURATION SOIC 150-MIL ....................................................................................... 5
4.
PIN CONFIGURATION SOIC 208-MIL ....................................................................................... 5
5.
PIN CONFIGURATION PDIP 300-MIL ....................................................................................... 5
6.
PAD CONFIGURATION WSON 6X5-MM................................................................................... 6
7. PIN DESCRIPTION..................................................................................................................... 6
7.1 Package Types ............................................................................................................... 7
7.2 Chip Select (/CS) ............................................................................................................ 7
7.3 Serial Data Output (DO).................................................................................................. 7
7.4 Write Protect (/WP)......................................................................................................... 7
7.5 HOLD (/HOLD)................................................................................................................ 7
7.6 Serial Clock (CLK) .......................................................................................................... 7
7.7 Serial Data Input / Output (DIO)...................................................................................... 7
8. BLOCK DIAGRAM ...................................................................................................................... 8
9. FUNCTIONAL DESCRIPTION.................................................................................................... 9
9.1 SPI OPERATIONS.......................................................................................................... 9
9.1.1 SPI Modes ........................................................................................................................9
9.1.2 Dual Output SPI ...............................................................................................................9
9.1.3 Hold Function ...................................................................................................................9
9.2 WRITE PROTECTION ................................................................................................. 10
9.2.1 Write Protect Features ...................................................................................................10
10. CONTROL AND STATUS REGISTERS ................................................................................... 11
10.1 STATUS REGISTER .................................................................................................... 11
10.1.1 BUSY............................................................................................................................11
10.1.2 Write Enable Latch (WEL) ...........................................................................................11
10.1.3 Block Protect Bits (BP2, BP1, BP0) .............................................................................11
10.1.4 Top/Bottom Block Protect (TB).....................................................................................11
10.1.5 Reserved Bits ...............................................................................................................11
10.1.6 Status Register Protect (SRP)......................................................................................12
10.1.7 Status Register Memory Protection..............................................................................13
10.2 INSTRUCTIONS ........................................................................................................... 14
10.2.1 Manufacturer and Device Identification ........................................................................14
10.2.2 Instruction Set ..............................................................................................................15
10.2.3 Write Enable (06h) .......................................................................................................16
10.2.4 Write Disable (04h) ......................................................................................................16
10.2.5 Read Status Register (05h)..................