Datasheet

PIC16F913/914/916/917/946
DS41250F-page 68 © 2007 Microchip Technology Inc.
3.5.1.7 RC6/TX/CK/SCK/SCL/SEG9
Figure 3-20 shows the diagram for this pin. The RC6
pin is configurable to function as one of the following:
• a general purpose I/O
• an asynchronous serial output
• a synchronous clock I/O
• a SPI clock I/O
•an I
2
C data I/O
• an analog output for the LCD
FIGURE 3-20: BLOCK DIAGRAM OF RC6
TX/CK Data Out
I
2
C
™
Data Out
RD PORTC
Data Bus
WR PORTC
WR TRISC
I/O Pin
RD TRISC
QD
Q
CK
Data Latch
QD
Q
CK
TRIS Latch
Schmitt
Trigger
SE9 and LCDEN
CK/SCL/SCK Input
SEG9
SE9 and LCDEN
PORT/USART/SSP Mode Select
(1)
USART or I
2
C
™
Drive
Note 1: If all three data output sources are enabled, the following priority order will be used:
• USART data (highest)
• SSP data
• PORT data (lowest)
SCK Data Out
VDD
VSS