2009 Microchip Technology Inc.
DS39636D-page 69
PIC18F2X1X/4X1X
SPBRGH
EUSART Baud Rate Generator Register High Byte
0000 0000
SPBRG
EUSART Baud Rate Generator Register Low Byte
0000 0000
RCREG
EUSART Receive Register
0000 0000
TXREG
EUSART Transmit Register
0000 0000
TXSTA
CSRC
TX9
TXEN
SYNC
SENDB
BRGH
TRMT
TX9D
0000 0010
RCSTA
SPEN
RX9
SREN
CREN
ADDEN
FERR
OERR
RX9D
0000 000x
IPR2
OSCFIP
CMIP
BCLIP
HLVDIP
TMR3IP
CCP2IP
11-- 1111
PIR2
OSCFIF
CMIF
BCLIF
HLVDIF
TMR3IF
CCP2IF
00-- 0000
PIE2
OSCFIE
CMIE
BCLIE
HLVDIE
TMR3IE
CCP2IE
00-- 0000
IPR1
PSPIP(2)
ADIP
RCIP
TXIP
SSPIP
CCP1IP
TMR2IP
TMR1IP
1111 1111
PIR1
PSPIF(2)
ADIF
RCIF
TXIF
SSPIF
CCP1IF
TMR2IF
TMR1IF
0000 0000
PIE1
PSPIE(2)
ADIE
RCIE
TXIE
SSPIE
CCP1IE
TMR2IE
TMR1IE
0000 0000
OSCTUNE
INTSRC
PLLEN(3)
TUN4
TUN3
TUN2
TUN1
TUN0
0q-0 0000
TRISE(2)
IBF
OBF
IBOV
PSPMODE
TRISE2
TRISE1
TRISE0
0000 -111
TRISD(2)
PORTD Data Direction Control Register
1111 1111
TRISC
PORTC Data Direction Control Register
1111 1111
TRISB
PORTB Data Direction Control Register
1111 1111
TRISA
TRISA7(5)
TRISA6(5)
Data Direction Control Register for PORTA
1111 1111
LATE(2)
PORTE Data Latch Register
(Read and Write to Data Latch)
---- -xxx
LATD(2)
PORTD Data Latch Register (Read and Write to Data Latch)
xxxx xxxx
LATC
PORTC Data Latch Register (Read and Write to Data Latch)
xxxx xxxx
LATB
PORTB Data Latch Register (Read and Write to Data Latch)
xxxx xxxx
LATA
LATA7(6)
LATA6(6)
PORTA Data Latch Register (Read and Write to Data Latch)
xxxx xxxx
PORTE
—RE3(4)
RE2(2)
RE1(2)
RE0(2)
---- xxxx
PORTD(2)
RD7
RD6
RD5
RD4
RD3
RD2
RD1
RD0
xxxx xxxx
PORTC
RC7
RC6
RC5
RC4
RC3
RC2
RC1
RC0
xxxx xxxx
PORTB
RB7
RB6
RB5
RB4
RB3
RB2
RB1
RB0
xxxx xxxx
PORTA
RA7(5)
RA6(5)
RA5
RA4
RA3
RA2
RA1
RA0
xx0x 0000
TABLE 5-2:
REGISTER FILE SUMMARY (PIC18F2X1X/4X1X) (CONTINUED)
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:
Legend:
x = unknown, u = unchanged, — = unimplemented, q = value depends on condition
Note
1:
The SBOREN bit is only available when the BOREN1:BOREN0 Configuration bits = 01; otherwise, it is disabled and reads as ‘0’. See
Section 4.4 “Brown-out Reset (BOR)”.
2:
These registers and/or bits are not implemented on 28-pin devices and are read as
0. Reset values are shown for 40/44-pin devices;
individual unimplemented bits should be interpreted as ‘-’.
3:
The PLLEN bit is only available in specific oscillator configuration; otherwise it is disabled and reads as
0. See Section 2.6.4 “PLL in
INTOSC Modes”.
4:
The RE3 bit is only available when Master Clear Reset is disabled (MCLRE Configuration bit = 0). Otherwise, RE3 reads as 0. This bit is
read-only.
5:
RA6/RA7 and their associated latch and direction bits are individually configured as port pins based on various primary oscillator modes.
When disabled, these bits read as ‘0’.
6:
Bit 7 and bit 6 are cleared by user software or by a POR.
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