PIC16F913/914/916/917/946
3.5.1.8
RC7/RX/DT/SDI/SDA/SEG8
Figure 3-21 shows the diagram for this pin. The RC7
pin is configurable to function as one of the following:
• a general purpose I/O
• an asynchronous serial input
• a synchronous serial data I/O
• a SPI data input
• an I2C data I/O
• an analog output for the LCD
FIGURE 3-21:
BLOCK DIAGRAM OF RC7
USART/I2C™ Mode Select(1)
DT Data Out
I2C™ Data Out
PORT/(USART or I2C™) Select
VDD
VSS
0
1
I/O Pin
Data Bus
D
Q
Q
WR PORTC
CK
Data Latch
D
Q
WR TRISC
CK
Q
TRIS Latch
SE8 and LCDEN
Schmitt
Trigger
RD TRISC
I2C™ Drive
or SCEN Drive
RD PORTC
RX/SDI Input
SE8 and LCDEN
SEG8
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)
© 2007 Microchip Technology Inc.
DS41250F-page 69
MICROCHIP [ MICROCHIP ]
