Datasheet

PIC12(L)F1571/2
DS40001723D-page 106  2013-2015 Microchip Technology Inc.
REGISTER 10-5: PMCON1: PROGRAM MEMORY CONTROL 1 REGISTER
U-1 R/W-0/0 R/W-0/0 R/W/HC-0/0 R/W/HC-x/q
(2)
R/W-0/0 R/S/HC-0/0 R/S/HC-0/0
—
(1)
CFGS LWLO
(3)
FREE WRERR WREN WR RD
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
S = Bit can only be set x = Bit is unknown -n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set ‘0’ = Bit is cleared HC = Hardware Clearable bit
bit 7 Unimplemented: Read as ‘1’
(1)
bit 6 CFGS: Configuration Select bit
1 = Accesses Configuration, User ID and Device ID registers
0 = Accesses Flash program memory
bit 5 LWLO: Load Write Latches Only bit
(3)
1 = Only the addressed program memory write latch is loaded/updated on the next WR command
0 = The addressed program memory write latch is loaded/updated and a write of all program memory
write latches will be initiated on the next WR command
bit 4 FREE: Program Flash Erase Enable bit
1 = Performs an erase operation on the next WR command (hardware cleared upon completion)
0 = Performs a write operation on the next WR command
bit 3 WRERR: Program/Erase Error Flag bit
(2)
1 = Condition indicates an improper program or erase sequence attempt or termination (bit is set
automatically on any set attempt (writes ‘1’) of the WR bit)
0 = The program or erase operation completed normally
bit 2 WREN: Program/Erase Enable bit
1 = Allows program/erase cycles
0 = Inhibits programming/erasing of program Flash
bit 1 WR: Write Control bit
1 = Initiates a program Flash program/erase operation
The operation is self-timed and the bit is cleared by hardware once operation is complete. The WR
bit can only be set (not cleared) in software.
0 = Program/erase operation to the Flash is complete and inactive
bit 0 RD: Read Control bit
1 = Initiates a program Flash read
Read takes one cycle. RD is cleared in hardware. The RD bit can only be set (not cleared) in
software.
0 = Does not initiate a program Flash read
Note 1: Unimplemented bit, read as ‘1’.
2: The WRERR bit is automatically set by hardware when a program memory write or erase operation is
started (WR = 1).
3: The LWLO bit is ignored during a program memory erase operation (FREE = 1).