PIC16F753 datasheet(27/230 Pages) MICROCHIP

27 / 230 page

 2013-2015 Microchip Technology Inc.

DS40001709C-page 27

PIC16F753/HV753

PMCON2: PROGRAM MEMORY CONTROL 2 REGISTER

PMCON1: PROGRAM MEMORY CONTROL 1 REGISTER

U-0

R/W-0/0

R/S/HC-0/0

—

—WREN

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 = Bit is cleared by hardware

bit 7-3

Unimplemented: Read as ‘0’

bit 2

WREN: Program/Erase Enable bit

= Allows program/erase cycles

= Inhibits programming/erasing of program Flash

bit 1

WR: Write Control bit

= 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.

= Program/erase operation to the Flash is complete and inactive

bit 0

RD: Read Control bit

= 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.

= Does not initiate a program Flash read

W-0/0

Program Memory Control Register 2

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

bit 7-0

Flash Memory Unlock Pattern bits:

To unlock writes, a 55h must be written first, followed by an AAh, before setting the WR bit of the

PMCON1 register. The value written to this register is used to unlock the writes. There are specific

timing requirements on these writes.

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