Datasheet

 2010 Microchip Technology Inc. DS39951C-page 53
PIC24FJ64GA104 FAMILY
REGISTER 5-1: NVMCON: FLASH MEMORY CONTROL REGISTER
R/SO-0, HC
(1)
R/W-0
(1)
R/W-0, HS
(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 HC = Hardware Clearable bit HS = Hardware Settable bit
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘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 NVMOP<3:0> on the next WR command
0 = Perform the program operation specified by NVMOP<3:0> on the next WR command
bit 5-4 Unimplemented: Read as ‘0’
bit 3-0 NVMOP<3:0>: NVM Operation Select bits
(1,2)
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 NVMOP<3:0> are unimplemented.
3: Available in ICSP™ mode only. Refer to device programming specification.