PIC24FJ256GB108-I Datasheet, PDF (65/352 Pages) Microchip Technology – 64/80/100-Pin, 16-Bit Flash Microcontrollers with USB On-The-Go (OTG)

PIC24FJ256GB110 FAMILY
REGISTER 5-1: NVMCON: 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
—
ERASE
—
bit 7
U-0
R/W-0⁽¹⁾
R/W-0⁽¹⁾
R/W-0⁽¹⁾
R/W-0⁽¹⁾
—
NVMOP3⁽²⁾ NVMOP2⁽²⁾ NVMOP1⁽²⁾ NVMOP0⁽²⁾
bit 0
Legend:
R = Readable bit
-n = Value at POR
SO = Settable Only bit
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 15
bit 14
bit 13
bit 12-7
bit 6
bit 5-4
bit 3-0
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 operation is complete.
0 = Program or erase operation is complete and inactive
WREN: Write Enable bit⁽¹⁾
1 = Enable Flash program/erase operations
0 = Inhibit Flash program/erase operations
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
Unimplemented: Read as ‘0’
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
Unimplemented: Read as ‘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:
2:
3:
These bits can only be reset on POR.
All other combinations of NVMOP<3:0> are unimplemented.
Available in ICSP™ mode only. Refer to device programming specification.
 2009 Microchip Technology Inc.
DS39897C-page 65