Datasheet

PIC12(L)F1840
DS41441B-page 110 Preliminary  2011 Microchip Technology Inc.
TABLE 11-3: SUMMARY OF REGISTERS ASSOCIATED WITH DATA EEPROM
REGISTER 11-6: EECON2: EEPROM CONTROL 2 REGISTER
W-0/0 W-0/0 W-0/0 W-0/0 W-0/0 W-0/0 W-0/0 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
Register
on Page
EECON1 EEPGD CFGS LWLO FREE WRERR WREN WR RD
109
EECON2 EEPROM Control Register 2 (not a physical register)
110*
EEADRL EEADRL<7:0>
108
EEADRH
— EEADRH<6:0 108
EEDATL EEDATL<7:0>
108
EEDATH
— — EEDATH<5:0> 108
INTCON GIE PEIE TMR0IE INTE IOCIE TMR0IF INTF IOCIF
83
PIE2
OSFIE
—
C1IE EEIE BCL1IE — — —
85
PIR2
OSFIF
—
C1IF EEIF BCL1IF — — —
87
Legend: — = unimplemented location, read as ‘0’. Shaded cells are not used by Data EEPROM module.
* Page provides register information.