W25X10A, W25X20A, W25X40A, W25X80A
Table of Contents
1.
2.
3.
4.
5.
6.
7.
GENERAL DESCRIPTION ......................................................................................................... 4
FEATURES................................................................................................................................. 4
PIN CONFIGURATION SOIC 150-MIL....................................................................................... 5
PIN CONFIGURATION SOIC 208-MIL....................................................................................... 5
PIN CONFIGURATION PDIP 300-MIL ....................................................................................... 5
PAD CONFIGURATION WSON 6X5-MM .................................................................................. 6
PIN DESCRIPTION..................................................................................................................... 6
7.1
7.2
7.3
7.4
7.5
7.6
7.7
Package Types............................................................................................................... 7
Chip Select (/CS)............................................................................................................ 7
Serial Data Output (DO) ................................................................................................. 7
Write Protect (/WP)......................................................................................................... 7
HOLD (/HOLD) ............................................................................................................... 7
Serial Clock (CLK) .......................................................................................................... 7
Serial Data Input / Output (DIO) ..................................................................................... 7
8.
9.
BLOCK DIAGRAM ...................................................................................................................... 8
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) ..........................................................................................17
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