Vault 7: Projects

This publication series is about specific projects related to the Vault 7 main publication.

© 2007 Microchip Technology Inc. Advance Information DS39715A-page 4-15
Section 4. Program Memory
Program
Memory
4
Register 4-1: NVMCOM: Nonvolatile Flash Memory Control Register
R/SO-0
(1)
R/W-0
(1)
R/W-0
(1)
U-0 U-0 U-0 U-0 U-0
WR WREN WRERR
bit 15 bit 8
U-0 R/W-0
(1)
U-0 U-0 R/W-0
(1)
R/W-0
(1)
R/W-0
(1)
R/W-0
(1)
ERASE NVMOP3
(2)
NVMOP2
(2)
NVMOP1
(2)
NVMOP0
(2)
bit 7 bit 0
Legend: SO = Settable-Only bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at Reset ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 WR: Write Control bit
(1)
1 = Initiates a Flash memory program or erase operation. The operation is self-timed and the bit is cleared
by hardware once the operation is complete.
0 = Program or erase operation is complete and inactive
bit 14 WREN: Write Enable bit
(1)
1 = Enable Flash program/erase operations
0 = Inhibit Flash program/erase operations
bit 13 WRERR: Write Sequence Error Flag bit
(1)
1 = An improper program or erase sequence attempt or termination has occurred (bit is set automatically
on any set attempt of the WR bit)
0 = The program or erase operation completed normally
bit 12-7 Unimplemented: Read as ‘0
bit 6 ERASE: Erase/Program Enable bit
(1)
1 = Perform the erase operation specified by NVMOP3:NVMOP0 on the next WR command
0 = Perform the program operation specified by NVMOP3:NVMOP0 on the next WR command
bit 5-4 Unimplemented: Read as ‘0
bit 3-0 NVMOP3:NVMOP0: NVM Operation Select bits
(2)
1111 = Memory bulk erase operation (ERASE = 1) or no operation (ERASE = 0)
(3)
0011 = Memory word program operation (ERASE = 0) or no operation (ERASE = 1)
0010 = Memory page erase operation (ERASE = 1) or no operation (ERASE = 0)
0001 = Memory row program operation (ERASE = 0) or no operation (ERASE = 1)
Note 1: These bits can only be reset on POR.
2: All other combinations of NVMOP3:NVMOP0 are unimplemented.
3: This operation is available in ICSP™ mode only.

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