PIC12C672 MICROCHIP [Microchip Technology], PIC12C672 Datasheet - Page 13

• Manufacturer Part Number: PIC12C672
• Description: 8-Pin, 8-Bit CMOS Microcontroller with EEPROM Data Memory
• Manufacturer: MICROCHIP [Microchip Technology]

4.2.2
The Special Function Registers (SFRs) are registers
used by the CPU and peripheral functions to control
the operation of the device (Table 4-1).
TABLE 4-1:
Address
Legend: Shaded boxes = unimplemented or unused, — = unimplemented, read as '0' (if applicable)
Note 1: The upper byte of the Program Counter is not directly accessible. See Section 4.6
N/A
N/A
00h
01h
02h
03h
04h
04h
05h
06h
1997 Microchip Technology Inc.
(1)
SPECIAL FUNCTION REGISTERS
x = unknown, u = unchanged, q = see the tables in Section 8.7 for possible values.
for an explanation of how to access these bits.
TRIS
OPTION
INDF
TMR0
PCL
STATUS
FSR
(12CE518) Indirect data memory address pointer
FSR
(12CE519) Indirect data memory address pointer
OSCCAL
(12CE518/
12CE519)
GPIO
Name
SPECIAL FUNCTION REGISTER (SFR) SUMMARY
Contains control bits to configure Timer0, Timer0/WDT
prescaler, wake-up on change, and weak pull-ups
Uses contents of FSR to address data memory (not a physical
register)
8-bit real-time clock/counter
Low order 8 bits of PC
GPWUF
CAL7
Bit 7
SCL
—
CAL6 CAL5 CAL4 CALFST CALSLW
Bit 6 Bit 5 Bit 4
SDA
—
—
GP5
PA0
I/O control registers
GP4
TO
Bit 3
Preliminary
GP3
PD
Bit 2
GP2
Z
The special registers can be classified into two sets.
The special function registers associated with the
“core” functions are described in this section. Those
related to the operation of the peripheral features are
described in the section for each peripheral feature.
Bit 1 Bit 0
GP1 GP0 11xx xxxx 11uu uuuu
DC
—
—
C
--11 1111 --11 1111
1111 1111 1111 1111
xxxx xxxx uuuu uuuu
xxxx xxxx uuuu uuuu
1111 1111 1111 1111
0001 1xxx 000q quuu
111x xxxx 111u uuuu
110x xxxx 11uu uuuu
0111 00-- uuuu uu--
Power-On
Value on
Reset
PIC12CE5XX
WDT Reset
MCLR and
Value on
DS40172A-page 13
Wake-up on
Pin Change
--11 1111
1111 1111
uuuu uuuu
uuuu uuuu
1111 1111
100q quuu
111u uuuu
11uu uuuu
uuuu uu--
11uu uuuu
Value on