2004 Microchip Technology Inc.
DS30491C-page 67
PIC18F6585/8585/6680/8680
TABLE 4-3:
REGISTER FILE SUMMARY
File Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR, BOR
Details
on page:
TOSU
—
Top-of-Stack Upper Byte (TOS<20:16>)
---0 0000
TOSH
Top-of-Stack High Byte (TOS<15:8>)
0000 0000
TOSL
Top-of-Stack Low Byte (TOS<7:0>)
0000 0000
STKPTR
STKFUL
STKUNF
—
Return Stack Pointer
00-0 0000
PCLATU
—
bit 21
Holding Register for PC<20:16>
--00 0000
PCLATH
Holding Register for PC<15:8>
0000 0000
PCL
PC Low Byte (PC<7:0>)
0000 0000
TBLPTRU
—
—bit 21(2)
Program Memory Table Pointer Upper Byte (TBLPTR<20:16>)
--00 0000
TBLPTRH
Program Memory Table Pointer High Byte (TBLPTR<15:8>)
0000 0000
TBLPTRL
Program Memory Table Pointer Low Byte (TBLPTR<7:0>)
0000 0000
TABLAT
Program Memory Table Latch
0000 0000
PRODH
Product Register High Byte
xxxx xxxx
PRODL
Product Register Low Byte
xxxx xxxx
INTCON
GIE/GIEH
PEIE/GIEL
TMR0IE
INT0IE
RBIE
TMR0IF
INT0IF
RBIF
0000 000x
INTCON2
RBPU
INTEDG0
INTEDG1
INTEDG2
INTEDG3
TMR0IP
INT3IP
RBIP
1111 1111
INTCON3
INT2IP
INT1IP
INT3IE
INT2IE
INT1IE
INT3IF
INT2IF
INT1IF
1100 0000
INDF0
Uses contents of FSR0 to address data memory – value of FSR0 not changed (not a physical register)
n/a
POSTINC0
Uses contents of FSR0 to address data memory – value of FSR0 post-incremented (not a physical register)
n/a
POSTDEC0
Uses contents of FSR0 to address data memory – value of FSR0 post-decremented (not a physical register)
n/a
PREINC0
Uses contents of FSR0 to address data memory – value of FSR0 pre-incremented (not a physical register)
n/a
PLUSW0
Uses contents of FSR0 to address data memory – value of FSR0 pre-incremented
(not a physical register) – value of FSR0 offset by value in WREG
n/a
FSR0H
—
Indirect Data Memory Address Pointer 0 High Byte
---- 0000
FSR0L
Indirect Data Memory Address Pointer 0 Low Byte
xxxx xxxx
WREG
Working Register
xxxx xxxx
INDF1
Uses contents of FSR1 to address data memory – value of FSR1 not changed (not a physical register)
n/a
POSTINC1
Uses contents of FSR1 to address data memory – value of FSR1 post-incremented (not a physical register)
n/a
POSTDEC1
Uses contents of FSR1 to address data memory – value of FSR1 post-decremented (not a physical register)
n/a
PREINC1
Uses contents of FSR1 to address data memory – value of FSR1 pre-incremented (not a physical register)
n/a
PLUSW1
Uses contents of FSR1 to address data memory – value of FSR1 pre-incremented
(not a physical register) – value of FSR1 offset by value in WREG
n/a
FSR1H
—
Indirect Data Memory Address Pointer 1 High Byte
---- 0000
FSR1L
Indirect Data Memory Address Pointer 1 Low Byte
xxxx xxxx
BSR
—
Bank Select Register
---- 0000
INDF2
Uses contents of FSR2 to address data memory – value of FSR2 not changed (not a physical register)
n/a
POSTINC2
Uses contents of FSR2 to address data memory – value of FSR2 post-incremented (not a physical register)
n/a
POSTDEC2
Uses contents of FSR2 to address data memory – value of FSR2 post-decremented (not a physical register)
n/a
PREINC2
Uses contents of FSR2 to address data memory – value of FSR2 pre-incremented (not a physical register)
n/a
PLUSW2
Uses contents of FSR2 to address data memory – value of FSR2 pre-incremented
(not a physical register) – value of FSR2 offset by value in WREG
n/a
FSR2H
—
Indirect Data Memory Address Pointer 2 High Byte
---- 0000
FSR2L
Indirect Data Memory Address Pointer 2 Low Byte
xxxx xxxx
Legend:
x
= unknown, u = unchanged, – = unimplemented, q = value depends on condition
Note
1:
RA6 and associated bits are configured as port pins in RCIO and ECIO Oscillator mode only and read ‘0’ in all other oscillator
modes.
2:
Bit 21 of the TBLPTRU allows access to the device configuration bits.
3:
These registers are unused on PIC18F6X80 devices; always maintain these clear.
4:
These bits have multiple functions depending on the CAN module mode selection.
5:
Meaning of this register depends on whether this buffer is configured as transmit or receive.
6:
RG5 is available as an input when MCLR is disabled.
7:
This register reads all ‘0’s until the ECAN module is set up in Mode 1 or Mode 2.