m95256-dr STMicroelectronics, m95256-dr Datasheet - Page 26

• Manufacturer Part Number: m95256-dr
• Description: 256 Kbit Serial Spi Bus Eeprom With High-speed Clock
• Manufacturer: STMicroelectronics

Instructions
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The instruction is not accepted, and so not executed, under the following conditions:
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Figure 16. Lock ID sequence
if the Write Enable Latch (WEL) bit has not been set to 1 (by previously executing a
Write Enable instruction)
if Status register bits (BP1,BP0) = (1,1)
if a write cycle is already in progress
if the device has not been deselected, by Chip Select (S) being driven high, at a byte
boundary (after the eighth bit, b0, of the last data byte that was latched in)
if the Identification page is locked by the Lock Status bit
Doc ID 12276 Rev 11
M95256-DR, M95256, M95256-W, M95256-R