PIC16F946 Datasheet, PDF (46/274 Pages) Microchip Technology – 64-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt Technology

PIC16F946
3.3.3.7 RB6/ICSPCLK/ICDCK/SEG14
Figure 3-12 shows the diagram for this pin. The
RB6/ICSPCLK/ICDCK/SEG14 pin is configurable to
function as one of the following:
• a general purpose I/O
• an In-Circuit Serial Programming™ clock
• an ICD clock I/O
• an analog output for the LCD
FIGURE 3-12:
BLOCK DIAGRAM OF RB6/ICSPCLK/ICDCK/SEG14
Program Mode/ICD
RBPU⁽¹⁾
SE14 and LCDEN
Data Bus
WR PORTB
WR TRISB
D
Q
CK
Data Latch
D
Q
CK
TRIS Latch
RD TRISB
VDD
P
Weak
Pull-up
VDD
TTL
Input Buffer
SE14 and LCDEN
I/O Pin
Set RBIF
RD PORTB
Q
D
EN
From other
RB<7:4> pins
Program Mode/ICD
Q
D
EN
PGC
SEG14
SE14 and LCDEN
Schmitt
Trigger Buffer
SE14 and LCDEN
RD PORTB
FOSC/4
Note 1: To enable weak pull-ups, set the appropriate TRIS bit(s) and clear the RBPU bit.
DS41265A-page 44
Preliminary
© 2005 Microchip Technology Inc.