Instructions
M95640-W M95640-R M95640-DF
6
Instructions
Each instruction starts with a single-byte code, as summarized in Table 3.
If an invalid instruction is sent (one not contained in Table 3), the device automatically
deselects itself.
Table 3.
Instruction set
Instruction
Description
Write Enable
Instruction format
WREN
WRDI
0000 0110
0000 0100
0000 0101
0000 0001
0000 0011
0000 0010
Write Disable
RDSR
WRSR
READ
WRITE
Read Status Register
Write Status Register
Read from Memory Array
Write to Memory Array
Table 4.
M95640-DF instruction set
Instruction
format
Instruction
Description
WREN
WRDI
Write Enable
0000 0110
0000 0100
0000 0101
0000 0001
0000 0011
0000 0010
Write Disable
RDSR
WRSR
READ
WRITE
Read Status Register
Write Status Register
Read from Memory Array
Write to Memory Array
Read Identification
Page
Reads the page dedicated to identification.
Writes the page dedicated to identification.
1000 0011(1)
1000 0010(1)
Write Identification
Page
Read Lock Status Reads the lock status of the Identification Page.
Lock ID Locks the Identification page in read-only mode.
1000 0011(2)
1000 0010(2)
1. Address bit A10 must be 0, all other address bits are Don't Care.
2. Address bit A10 must be 1, all other address bits are Don't Care.
Table 5.
Address range bits
Address significant bits
A12-A0(1)
1. Upper MSBs are Don’t Care.
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Doc ID 16877 Rev 16
STMICROELECTRONICS [ ST ]
