PIC16F631 Datasheet, PDF (74/294 Pages) Microchip Technology – 20-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

PIC16F631/677/685/687/689/690
4.4.3.2 RB5/AN11/RX/DT
Figure 4-8 shows the diagram for this pin. The
RB5/AN11/RX/DT^(1,2) pin is configurable to function as
one of the following:
• a general purpose I/O
• an analog input for the ADC (except PIC16F631)
• an asynchronous serial input
• a synchronous serial data I/O
Note 1: RX and DT are available on
PIC16F687/PIC16F689/PIC16F690 only.
2: AN11 is not implemented on PIC16F631.
FIGURE 4-8:
Data Bus
DQ
WR
WPUB
CK _Q
RD
WPUB
DQ
WR
PORTB
CK _Q
WR
TRISB
DQ
CK _Q
RD
TRISB
BLOCK DIAGRAM OF RB5
Analog⁽¹⁾
Input Mode
VDD
Weak
RABPU
SYNC
SPEN
VDD
EUSART
DT ₀₁
10
From
EUSART 01
10
Analog⁽¹⁾
Input Mode
I/O Pin
VSS
RD
PORTB
DQ
WR
IOCB
CK _Q
RD
IOCB
QD
EN
QD
EN
Interrupt-on-
Change
RD PORTB
To EUSART RX/DT
To A/D Converter⁽²⁾
Q3
ST
Available on PIC16F687/PIC16F689/PIC16F690 only.
Note 1: ANSEL determines Analog Input mode.
2: Not implemented on PIC16F631.
DS41262D-page 72
© 2007 Microchip Technology Inc.