PIC18F2331 Datasheet, PDF (274/396 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High Performance PWM and A/D

PIC18F2331/2431/4331/4431
REGISTER 22-5: CONFIG3H: CONFIGURATION REGISTER 3 HIGH (BYTE ADDRESS 300005h)
R/P-1
U
U
R/P-1
R/P-1
R/P-1
U
R/P-1
MCLRE
—
—
EXCLKMX⁽¹⁾ PWM4MX⁽¹⁾ SSPMX⁽¹⁾
—
FLTAMX⁽¹⁾
bit 7
bit 0
bit 7
bit 6-5
bit 4
bit 3
bit 2
bit 1
bit 0
MCLRE: MCLR Pin Enable bit
1 = RE3 input pin enabled; MCLR disabled.
0 = MCLR pin enabled: RE3 input pin disabled.
Unimplemented: Read as ‘0’
EXCLKMX: TMR0/T5CKI External Clock Mux bit
1 = TMR0/T5CKI external clock input is multiplexed with RC3
0 = TMR0/T5CKI external clock input is multiplexed with RD0
PWM4MX: PWM4 Mux bit
1 = PWM4 output is multiplexed with RB5
0 = PWM4 output is multiplexed with RD5
SSPMX: SSP I/O Mux bit
1 = SCK/SCL clocks and SDA/SDI data are multiplexed with RC5 and RC4 respectively.
SDO output is multiplexed with RC7.
0 = SCK/SCL clocks and SDA/SDI data are multiplexed with RD3 and RD2 respectively.
SDO output is multiplexed with RD1.
Unimplemented: Read as ‘0’
FLTAMX: FLTA Mux bit
1 = FLTA input is multiplexed with RC1
0 = FLTA input is multiplexed with RD4
Note 1: Unimplemented in PIC18F2X31 devices; maintain this bit set.
Legend:
R = Readable bit
P = Programmable bit
- n = Value when device is unprogrammed
U = Unimplemented bit, read as ‘0’
u = Unchanged from programmed state
DS39616B-page 272
Preliminary
 2003 Microchip Technology Inc.