PIC16CR54C Datasheet, PDF (14/84 Pages) Microchip Technology – ROM-Based 8-Bit CMOS Microcontroller Series

PIC16CR54C
TABLE 4-1: SPECIAL FUNCTION REGISTER SUMMARY
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
Power-On
Reset
Value on
MCLR and
WDT Reset
N/A
TRIS
I/O control registers (TRISA, TRISB)
N/A
OPTION Contains control bits to configure Timer0 and Timer0/WDT prescaler
00h
INDF
Uses contents of FSR to address data memory (not a physical register)
01h
TMR0
8-bit real-time clock/counter
02h⁽¹⁾
PCL
Low order 8 bits of PC
03h
STATUS
PA2 PA1 PA0
TO
PD
Z
DC
C
04h
FSR
Indirect data memory address pointer
05h
PORTA
—
—
—
—
RA3 RA2 RA1 RA0
06h
PORTB
RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0
Legend:
Note 1:
Shaded boxes = unimplemented or unused, – = unimplemented, read as '0' (if applicable)
x = unknown, u = unchanged, q = see the tables in Section 7.7 for possible values.
The upper byte of the Program Counter is not directly accessible. See Section 4.5
for an explanation of how to access these bits.
1111 1111 1111 1111
--11 1111 --11 1111
xxxx xxxx uuuu uuuu
xxxx xxxx uuuu uuuu
1111 1111 1111 1111
0001 1xxx 000q quuu
1xxx xxxx 1uuu uuuu
---- xxxx ---- uuuu
xxxx xxxx uuuu uuuu
DS40191A-page 14
Preliminary
© 1998 Microchip Technology Inc.