PIC16C72-04SLASHSS datasheet(48/288 Pages) MICROCHIP

48 / 288 page

PIC16C7X

DS30390E-page 48

5.3

PORTC and TRISC Registers

PORTC is an 8-bit bi-directional port. Each pin is indi-

vidually conﬁgurable 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.

EXAMPLE 5-3:

INITIALIZING PORTC

BCF

STATUS, RP0

; Select Bank 0

BCF

STATUS, RP1

; PIC16C76/77 only

CLRF

PORTC

; Initialize PORTC by

; clearing output

; data latches

BSF

STATUS, RP0

; Select Bank 1

MOVLW

0xCF

; Value used to

; initialize data

; direction

MOVWF

TRISC

; Set RC<3:0> as inputs

; RC<5:4> as outputs

; RC<7:6> as inputs

Applicable Devices

72 73 73A 74 74A 76 77

FIGURE 5-6:

PORTC BLOCK DIAGRAM

(PERIPHERAL OUTPUT

OVERRIDE)

PORT/PERIPHERAL Select(2)

Data bus

PORT

TRIS

Data Latch

TRIS Latch

RD TRIS

Schmitt

Trigger

Peripheral Data Out

VDD

VSS

PORT

Peripheral

OE(3)

Peripheral input

I/O

pin(1)

Note 1:

I/O pins have diode protection to VDD and VSS.

Port/Peripheral select signal selects between port

data and peripheral output.

Peripheral OE (output enable) is only activated if

peripheral select is active.

TABLE 5-5:

PORTC FUNCTIONS

Name

Bit#

Buffer Type

Function

RC0/T1OSO/T1CKI

bit0

Input/output port pin or Timer1 oscillator output/Timer1 clock input

RC1/T1OSI/CCP2(1)

bit1

Input/output port pin or Timer1 oscillator input or Capture2 input/

Compare2 output/PWM2 output

RC2/CCP1

bit2

Input/output port pin or Capture1 input/Compare1 output/PWM1

output

RC3/SCK/SCL

bit3

RC3 can also be the synchronous serial clock for both SPI and I2C

modes.

RC4/SDI/SDA

bit4

RC4 can also be the SPI Data In (SPI mode) or data I/O (I2C mode).

RC5/SDO

bit5

Input/output port pin or Synchronous Serial Port data output

RC6/TX/CK(2)

bit6

Input/output port pin or USART Asynchronous Transmit, or USART

Synchronous Clock

RC7/RX/DT(2)

bit7

Input/output port pin or USART Asynchronous Receive, or USART

Synchronous Data

Legend: ST = Schmitt Trigger input

Note 1: The CCP2 multiplexed function is not enabled on the PIC16C72.

2: The TX/CK and RX/DT multiplexed functions are not enabled on the PIC16C72.

PIC16C72-04/SS Datasheet(PDF) 48 Page - Microchip Technology

PIC16C72-04/SS Datasheet(HTML) 48 Page - Microchip Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL