41594B datasheet(108/372 Pages) MICROCHIP

108 / 372 page

PIC12LF1840T48A

DS41594B-page 108

Preliminary

 2011-2012 Microchip Technology Inc.

TABLE 11-3:

SUMMARY OF REGISTERS ASSOCIATED WITH DATA EEPROM

EECON2: EEPROM CONTROL 2 REGISTER

W-0/0

EEPROM 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

Data EEPROM Unlock Pattern bits

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

EECON1 register. The value written to this register is used to unlock the writes. There are specific

timing requirements on these writes. Refer to Section 11.2.2 “Writing to the Data EEPROM

Memory” for more information.

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

on Page

EECON1

EEPGD

CFGS

LWLO

FREE

WRERR

WREN

107

EECON2

EEPROM Control Register 2 (not a physical register)

108*

EEADRL

EEADRL<7:0>

106

EEADRH

—

EEADRH<6:0

106

EEDATL

EEDATL<7:0>

106

EEDATH

—

EEDATH<5:0>

106

INTCON

GIE

PEIE

TMR0IE

INTE

IOCIE

TMR0IF

INTF

IOCIF

PIE2

OSFIE

—

C1IE

EEIE

BCL1IE

—

PIR2

OSFIF

—

C1IF

EEIF

BCL1IF

—

Legend: — = unimplemented location, read as ‘0’. Shaded cells are not used by data EEPROM module.

* Page provides register information.

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