
PIC16F87XA
DS39582A-page 18
Advance Information
2001 Microchip Technology Inc.
Bank 1
80h
(3)
INDF
Addressing this location uses contents of FSR to address data memory
(not a physical register)
RBPU
INTEDG
T0CS
Program Counter (PC) Least Significant Byte
IRP
RP1
RP0
Indirect Data Memory Address Pointer
—
—
PORTA Data Direction Register
PORTB Data Direction Register
PORTC Data Direction Register
PORTD Data Direction Register
IBF
OBF
IBOV
PSPMODE
—
—
—
Write Buffer for the upper 5 bits of the Program Counter
GIE
PEIE
TMR0IE
INTE
PSPIE
(2)
ADIE
RCIE
TXIE
—
CMIE
—
EEIE
—
—
—
—
Unimplemented
Unimplemented
GCEN
ACKSTAT
ACKDT
ACKEN
Timer2 Period Register
Synchronous Serial Port (I
2
C mode) Address Register
SMP
CKE
D/A
P
Unimplemented
Unimplemented
Unimplemented
CSRC
TX9
TXEN
SYNC
Baud Rate Generator Register
Unimplemented
Unimplemented
C2OUT
C1OUT
C2INV
C1INV
CVREN
CVROE
CVRR
—
A/D Result Register Low Byte
ADFM
ADCS2
—
—
x
= unknown,
u
= unchanged,
q
= value depends on condition, - = unimplemented, read as '0', r = reserved.
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 transferred to the upper byte of the program counter.
2:
Bits PSPIE and PSPIF are reserved on PIC16F873A/876A devices; always maintain these bits clear.
3:
These registers can be addressed from any bank.
4:
PORTD, PORTE, TRISD, and TRISE are not implemented on PIC16F873A/876A devices, read as
‘
0
’
.
5:
Bit 4 of EEADRH implemented only on the PIC16F876A/877A devices.
0000 0000
29, 148
81h
82h
(3)
83h
(3)
84h
(3)
85h
86h
87h
88h
(4)
89h
(4)
8Ah
(1,3)
8Bh
(3)
8Ch
8Dh
8Eh
8Fh
90h
91h
92h
93h
94h
95h
96h
97h
98h
99h
9Ah
9Bh
9Ch
9Dh
9Eh
9Fh
Legend:
OPTION_REG
PCL
STATUS
FSR
TRISA
TRISB
TRISC
TRISD
TRISE
PCLATH
INTCON
PIE1
PIE2
PCON
—
—
SSPCON2
PR2
SSPADD
SSPSTAT
—
—
—
TXSTA
SPBRG
—
—
CMCON
CVRCON
ADRESL
ADCON1
T0SE
PSA
PS2
PS1
PS0
1111 1111
21, 148
0000 0000
28, 148
0001 1xxx
20, 148
xxxx xxxx
29, 148
--11 1111
41, 148
1111 1111
43, 148
1111 1111
45, 148
1111 1111
46, 148
0000 -111
48, 148
---0 0000
28, 148
0000 000x
22, 148
0000 0000
23, 149
-0-0 0--0
25, 149
---- --qq
27, 149
—
—
0000 0000
81, 149
1111 1111
60, 149
0000 0000
77, 149
0000 0000
77, 149
—
—
—
0000 -010
109, 149
0000 0000
111, 149
—
—
0000 0111
133, 149
000- 0000
139, 149
xxxx xxxx
131, 149
0--- 0000
126, 149
TO
PD
Z
DC
C
—
PORTE Data Direction Bits
RBIE
SSPIE
BCLIE
—
TMR0IF
CCP1IE
—
—
INTF
TMR2IE
—
POR
RBIF
TMR1IE
CCP2IE
BOR
—
—
RCEN
PEN
RSEN
SEN
S
R/W
UA
BF
—
—
—
—
BRGH
TRMT
TX9D
—
—
CIS
CVR3
CM2
CVR2
CM1
CVR1
CM0
CVR0
PCFG3
PCFG2
PCFG1
PCFG0
TABLE 2-1:
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:
POR, BOR
Details
on
page: