PIC18F2331 Datasheet, PDF (122/396 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers with nanoWatt Technology, High Performance PWM and A/D

PIC18F2331/2431/4331/4431
FIGURE 10-16: BLOCK DIAGRAM OF RC3
Data Bus
WR LATC
or
PORTC
WR TRISC
RD LATC
D
Q
CK Q
Data Latch
D
Q
CK Q
TRIS Latch
RD TRISC
RD PORTC
Q
D
EN
VDD
P
N
VSS
Schmitt
Trigger
RC3 Pin
EXCLKMX_enable⁽¹⁾
T0CKI/T5CKI Input
Note 1: The T0CKI/T5CKI bit is multiplexed with RD0 when the EXCLKM is enabled (= 1 ) in the configuration register.
FIGURE 10-17: BLOCK DIAGRAM OF RC4
PORT/SSP Mode & SSPMX Select
SDA Data Out
0
1
RD LATC
Data Bus
D
Q
WR LATC
or
PORTC
CK Q
Data Latch
D
Q
WR TRISC
CK Q
TRIS Latch
SDA Drive
RD TRISC
RD PORTC
Q
D
EN
VDD
P
N
VSS
Schmitt
Trigger
RC4 Pin
SSPMX⁽¹⁾
SDI/SDA Input
Note 1: The SDI/SDA bits are multiplexed on RD2 and RC4 pins by SSPMX bit in the configuration register.
DS39616B-page 120
Preliminary
 2003 Microchip Technology Inc.