PIC18F2331_10 Datasheet, PDF (70/392 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High-Performance PWM and A/D

PIC18F2331/2431/4331/4431
TABLE 6-2: REGISTER FILE SUMMARY (PIC18F2331/2431/4331/4431)
File Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR, BOR
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
—
SP4
SP3
SP2
SP1
SP0
00-0 0000
PCLATU
—
—
bit 21⁽³⁾ Holding Register for PC<20:16>
---0 0000
PCLATH
Holding Register for PC<15:8>
0000 0000
PCL
TBLPTRU
PC Low Byte (PC<7:0>)
—
—
bit 21⁽³⁾ Program Memory Table Pointer Upper Byte (TBLPTR<20:16>)
0000 0000
--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
—
TMR0IP
—
RBIP
1111 -1-1
INTCON3
INT2IP
INT1IP
—
INT2IE
INT1IE
—
INT2IF
INT1IF 11-0 0-00
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 offset by W (not a physical register)
N/A
FSR0H
—
—
—
—
Indirect Data Memory Address Pointer 0 High
---- xxxx
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 offset by W (not a physical register)
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 offset by W (not a physical register)
N/A
FSR2H
—
—
—
—
Indirect Data Memory Address Pointer 2 High Byte
---- 0000
FSR2L
Indirect Data Memory Address Pointer 2 Low Byte
xxxx xxxx
STATUS
—
—
—
N
OV
Z
DC
C
---x xxxx
TMR0H
Timer0 Register High Byte
0000 0000
TMR0L
Timer0 Register Low Byte
xxxx xxxx
T0CON
TMR0ON
T016BIT
T0CS
T0SE
PSA
T0PS2
T0PS1
T0PS0 1111 1111
Legend:
Note 1:
2:
3:
4:
5:
x = unknown, u = unchanged, - = unimplemented, q = value depends on condition. Shaded cells are unimplemented.
RA6 and associated bits are configured as port pins in RCIO, ECIO and INTIO2 (with port function on RA6) Oscillator modes only and read
‘0’ in all other oscillator modes.
RA7 and associated bits are configured as port pins in INTIO2 Oscillator mode only and read ‘0’ in all other modes.
Bit 21 of the PC is only available in Test mode and Serial Programming modes.
These registers and/or bits are not implemented on the PIC18F2331/2431 devices and read as ‘0’.
The RE3 port bit is only available for PIC18F4331/4431 devices when the MCLRE fuse (CONFIG3H<7>) is programmed to ‘0’; otherwise, RE3
reads ‘0’. This bit is read-only.
DS39616D-page 70
 2010 Microchip Technology Inc.