PIC16F946 Datasheet, PDF (47/274 Pages) Microchip Technology – 64-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt Technology

PIC16F946
3.3.3.8 RB7/ICSPDAT/ICDDAT/SEG13
Figure 3-13 shows the diagram for this pin. The
RB7/ICSPDAT/ICDDAT/SEG13 pin is configurable to
function as one of the following:
• a general purpose I/O
• an In-Circuit Serial Programming™ I/O
• an ICD data I/O
• an analog output for the LCD
FIGURE 3-13:
BLOCK DIAGRAM OF RB7/ICSPDAT/ICDDAT/SEG13
PORT/Program Mode/ICD
PGD
RBPU⁽¹⁾
SE13 and LCDEN
Data Bus
WR PORTB
WR TRISB
PGD DRVEN
D
Q
CK
Data Latch
D
Q
CK
TRIS Latch
1
0
0
1
VDD
P
Weak
Pull-up
VDD
TTL
Input Buffer
RD TRISB
SE13 and LCDEN
I/O Pin
Set RBIF
RD PORTB
Q
D
EN
RD PORTB
From other
RB<7:4> pins
PGD
SEG13
Program Mode/ICD
Q
D
EN
FOSC/4
SE13 and LCDEN
Schmitt
Trigger Buffer
SE13 and LCDEN
Note 1: To enable weak pull-ups, set the appropriate TRIS bit(s) and clear the RBPU bit.
© 2005 Microchip Technology Inc.
Preliminary
DS41265A-page 45