S25FL032A Meet Spansion Inc., S25FL032A Datasheet - Page 15

• Manufacturer Part Number: S25FL032A
• Description: 32 Megabit Cmos 3.0 Volt Flash Memory With 50 Mhz Spi Bus Interface
• Manufacturer: Meet Spansion Inc.

9. Command Definitions
July 2, 2007 S25FL032A_00_C2
The host system must shift all commands, addresses, and data in and out of the device, beginning with the
most significant bit. On the first rising edge of SCK after CS# is driven low, the device accepts the one-byte
command on SI (all commands are one byte long), most significant bit first. Each successive bit is latched on
the rising edge of SCK.
Every command sequence begins with a one-byte command code. The command may be followed by
address, data, both, or nothing, depending on the command. CS# must be driven high after the last bit of the
command sequence has been written.
The Read Data Bytes (READ), Read Status Register (RDSR), Read Data Bytes at Higher Speed
(FAST_READ) and Read Identification (RDID) command sequences are followed by a data output sequence
on SO. CS# can be driven high after any bit of the sequence is output to terminate the operation.
The Page Program (PP), Sector Erase (SE), Bulk Erase (BE), Write Status Register (WRSR), Write Enable
(WREN), or Write Disable (WRDI) commands require that CS# be driven high at a byte boundary, otherwise
the command is not executed. Since a byte is composed of eight bits, CS# must therefore be driven high
when the number of clock pulses after CS# is driven low is an exact multiple of eight.
The device ignores any attempt to access the memory array during a Write Status Register, program, or
erase operation, and continues the operation uninterrupted.
Sector
SA15
SA14
SA13
SA12
SA11
SA10
SA9
SA8
SA7
SA6
SA5
SA4
SA3
SA2
SA1
SA0
Table 9.4 on page 26
Table 8.2 S25FL032A Sector Address Table (Sheet 2 of 2)
D a t a
S h e e t
S25FL032A
lists the complete set of commands.
0D0000h
0C0000h
0F0000h
0E0000h
0B0000h
0A0000h
090000h
080000h
070000h
060000h
050000h
040000h
030000h
020000h
010000h
000000h
Address Range
0EFFFFh
0DFFFFh
0CFFFFh
0BFFFFh
0AFFFFh
0FFFFFh
09FFFFh
08FFFFh
07FFFFh
06FFFFh
05FFFFh
04FFFFh
03FFFFh
02FFFFh
01FFFFh
00FFFFh
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