PIC16F688-E/SL 查看數據表（PDF） - Microchip Technology

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PIC16F688-E/SL

14-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

Microchip Technology 

PIC16F688

4.3.5 RC4/C2OUT/TX/CK

Figure 4-9 shows the diagram for this pin. The RC4 is

configurable to function as one of the following:

• a general purpose I/O

• a digital output from the comparator

• a digital I/O for the EUSART

FIGURE 4-9:

BLOCK DIAGRAM OF RC4

USART Select(1)

C2OUT EN

EUSART

TX/CLKOUT 0

Data Bus

0

C2OUT 1

1

DQ

WR

PORTC

CK Q

WR

TRISC

DQ

CK Q

RD

TRISC

RD

PORTC

To EUSART CLK Input

VDD

I/O Pin

VSS

Note 1: USART Select signals selects between port

data and peripheral output.

4.3.6 RC5/RX/DT

The RC5 is configurable to function as one of the

following:

• a general purpose I/O

• a digital I/O for the EUSART

FIGURE 4-10:

BLOCK DIAGRAM OF RC5

PIN

Data Bus

D

EUSART Out

Enable

Q

WR

PORTC

CK Q

DQ

EUSART 1

DT Out

0

WR

TRISC

CK Q

VDD

I/O Pin

VSS

RD

TRISC

RD

PORTC

To EUSART RX/DT In

TABLE 4-2: SUMMARY OF REGISTERS ASSOCIATED WITH PORTC

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Value on

POR, BOR

Value on

all other

Resets

ANSEL

ANS7 ANS6 ANS5 ANS4 ANS3 ANS2

ANS1

ANS0 1111 1111 1111 1111

CMCON0 C2OUT C1OUT C2INV C1INV

CIS

CM2

CM1

CM0 0000 0000 0000 0000

PORTC

—

—

RC5

RC4

RC3

RC2

RC1

RC0 --xx 0000 --xx 0000

TRISC

—

—

TRISC5 TRISC4 TRISC3 TRISC2 TRISC1 TRISC0 --11 1111 --11 1111

Legend: x = unknown, u = unchanged, – = unimplemented locations read as ‘0’. Shaded cells are not used by PORTC.

DS41203C-page 44

© 2007 Microchip Technology Inc.

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