PIC16F946 Datasheet, PDF (56/274 Pages) Microchip Technology – 64-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt Technology

PIC16F946
3.4.1.8 RC7/RX/DT/SDI/SDA/SEG8
Figure 3-21 shows the diagram for this pin. The
RC7/RX/DT/SDI/SDA/SEG8 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 I/O
• an I²C data I/O
• an analog output for the LCD
FIGURE 3-21:
BLOCK DIAGRAM OF RC7/RX/DT/SDI/SDA/SEG8
SCEN/I²C^™ Mode Select⁽¹⁾
DT Data Out
0
I²C^™ Data Out ₁
PORT/(SCEN or I²C^™) Select
Data Bus
WR PORTC
WR TRISC
DQ
CK Q
Data Latch
DQ
CK Q
TRIS Latch
I²C^™ Drive
or SCEN Drive
RD TRISC
0
1
SE8 and LCDEN
Schmitt
Trigger
RD PORTC
RX/SDI Input
SEG8
SE8 and LCDEN
VDD
RC7/RX/DT/
SDI/SDA/
SEG8
Pin
Note 1: If SSP and USART outputs are both enabled, the USART data output will have priority over the
SSP data output. Both SSP and USART data outputs will have priority over the PORT data
output.
DS41265A-page 54
Preliminary
© 2005 Microchip Technology Inc.