PIC16C781 Datasheet, PDF (16/186 Pages) Microchip Technology – 8-Bit CMOS Microcontrollers with A/D, D/A, OPAMP, Comparators and PSMC

PIC16C781/782
TABLE 2-1: PIC16C781/782 SPECIAL FUNCTION REGISTER SUMMARY (CONTINUED)
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on: Details on
POR, BOR Page:
Bank 1
80h⁽²⁾
INDF
Addressing this location uses contents of FSR to address data memory (not a physical register) 0000 0000
23
81h
OPTION_REG RBPU INTEDG T0CS
T0SE
PSA
PS2
PS1
PS0 1111 1111
18
82h⁽²⁾
PCL
Program Counter’s (PC) Least Significant Byte
0000 0000
23
83h⁽²⁾ STATUS
IRP
RP1
RP0
TO
PD
Z
84h⁽²⁾
FSR
Indirect Data Memory Address Pointer
DC
C
0001 1xxx
17
xxxx xxxx
23
85h
TRISA
PORTA Data Direction Register
1111 1111
26
86h
TRISB
PORTB Data Direction Register
1111 1111
35
87h
—
Unimplemented
—
—
88h
—
Unimplemented
—
—
89h
8Ah^(1,2)
8Bh⁽²⁾
—
PCLATH
INTCON
Unimplemented
—
—
GIE
PEIE
—
—
— Write Buffer for the upper 5 bits of the Program Counter
---0 0000
23
T0IE
INTE
RBIE
T0IF
INTF
RBIF 0000 000x
19
8Ch
PIE1
LVDIE ADIE
C2IE
C1IE
—
—
—
TMR1IE 0000 ---0
20
8Dh
—
Unimplemented


8Eh
PCON
—
—
—
WDTON OSCF
—
POR
BOR ---q 1-qq 22, 120
8Fh

Unimplemented
—
—
90h
—
Unimplemented
—
—
91h
—
Unimplemented
—
—
92h
—
Unimplemented
—
—
93h
—
Unimplemented
—
—
94h
—
Unimplemented
—
—
95h
WPUB
PORTB Weak Pull-up Control
1111 1111
36
96h
IOCB
PORTB Interrupt-on-Change Control
1111 0000
36
97h
—
Unimplemented
—
—
98h
—
Unimplemented
—
—
99h
—
Unimplemented
—
—
9Ah
—
Unimplemented
—
—
9Bh
REFCON
—
—
—
—
VREN
VROE
—

---- 00--
61
9Ch
LVDCON
—
—
BGST LVDEN
LV3
LV2
LV1
LV0 --00 0101
66
9Dh
ANSEL
Analog Channel Select
1111 1111
25
9Eh
—
Unimplemented
—
—
9Fh
ADCON1
—
—
VCFG1 VCFG0
—
—
—
—
--00 ----
71
Legend: x = unknown, u = unchanged, q = value depends on condition, - = unimplemented, read as '0'.
Shaded locations are unimplemented, read as ‘0’.
Note 1: The upper byte of the program counter is not directly accessible. PCLATH is a holding register for the PC<12:8> whose contents are trans-
ferred to the upper byte of the program counter. See Section 2.9 for more detail.
2: These registers can be addressed from any bank.
DS41171A-page 14
Preliminary
 2001 Microchip Technology Inc.