PIC16C745/P Microchip Technology, PIC16C745/P Datasheet - Page 35
PIC16C745/P
Manufacturer Part Number
PIC16C745/P
Description
8-Bit CMOS Microcontrollers with USB
Manufacturer
Microchip Technology
Datasheet
1.PIC16C745P.pdf
(158 pages)
- Current page: 35 of 158
- Download datasheet (3Mb)
5.3
PORTC is a 5-bit bi-directional port. Each pin is individ-
ually configureable as an input or output through the
TRISC register. PORTC is multiplexed with several
peripheral functions (Table 5-5). PORTC pins have
Schmitt Trigger input buffers.
When enabling peripheral functions, care should be
taken in defining TRIS bits for each PORTC pin. Some
peripherals override the TRIS bit to make a pin an out-
put, while other peripherals override the TRIS bit to
make a pin an input. Since the TRIS bit override is in
effect while the peripheral is enabled, read-modify-
write instructions (BSF, BCF, XORWF) with TRISC as
destination should be avoided. The user should refer to
the corresponding peripheral section for the correct
TRIS bit settings.
1999 Microchip Technology Inc.
PORTC and TRISC Registers
Advanced Information
FIGURE 5-5:
PORT/PERIPHERAL Select
Peripheral Data Out
Data Bus
Peripheral
OE
Peripheral Input
Note 1: Port/Peripheral select signal selects between port
WR
PORT
WR
TRIS
(2)
2: Peripheral OE (output enable) is only activated if
RD
PORT
data and peripheral output.
peripheral select is active.
TRIS Latch
Data Latch
D
D
RD TRIS
CK
CK
PIC16C745/765
Q
Q
Q
Q
PORTC BLOCK DIAGRAM
(1)
0
1
Q
EN
D
Schmitt
Trigger
DS41124A-page 35
V
V
N
P
SS
DD
V
DD
I/O
pin
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