Datasheet

Instructions M95256-W M95256-R M95256-DR M95256-DF
16/52 DocID12276 Rev 20
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 Instruction format
WREN Write Enable 0000 0110
WRDI Write Disable 0000 0100
RDSR Read Status Register 0000 0101
WRSR Write Status Register 0000 0001
READ Read from Memory Array 0000 0011
WRITE Write to Memory Array 0000 0010
Table 4. M95256-D instruction set
Instruction Description Instruction format
WREN Write Enable 0000 0110
WRDI Write Disable 0000 0100
RDSR Read Status Register 0000 0101
WRSR Write Status Register 0000 0001
READ Read from Memory Array 0000 0011
WRITE Write to Memory Array 0000 0010
Read Identification
Page
Reads the page dedicated to identification. 1000 0011
(1)
1. Address bit A10 must be 0, all other address bits are Don't Care.
Write Identification
Page
Writes the page dedicated to identification. 1000 0010
(1)
Read Lock Status Reads the lock status of the Identification Page. 1000 0011
(2)
2. Address bit A10 must be 1, all other address bits are Don't Care.
Lock ID Locks the Identification page in read-only mode. 1000 0010
(2)
Table 5. Address range bits
Address significant bits A14-A0
(1)
1. Upper MSBs are Don’t Care.