Datasheet

MCP454X/456X/464X/466X
DS22107B-page 40  2008-2013 Microchip Technology Inc.
bit 0 WP: EEPROM Write Protect Status bit (Refer to the section EEPROM Write Protect for further
information)
This bit indicates the status of the write protection on the EEPROM memory. When Write Protect is
enabled, writes to all nonvolatile memory are prevented. This includes the General Purpose EEPROM
memory, and the nonvolatile Wiper registers. Write Protect does not block modification of the volatile
wiper register values or the volatile TCON register value (via Increment, Decrement, or Write
commands).
This status bit is an OR of the devices Write Protect pin (WP
) and the internal nonvolatile WP bit. High
Voltage commands are required to enable and disable the internal WP EEPROM bit.
1 = EEPROM memory is Write Protected
0 = EEPROM memory can be written
REGISTER 4-1: STATUS REGISTER (ADDRESS = 0x05) (CONTINUED)
Note 1: Requires a High Voltage command to modify the state of this bit (for nonvolatile devices only). This bit is
not directly written, but reflects the system state (for this feature).