Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsMicrocontrollers, Microprocessors & QuartzesEmbedded microcontroller SSOP 20 8-Bit 20 MHz I/O number 17

PIC16F785/HV785

4.2.3.5 RA4/AN3/T1G/OSC2/CLKOUT

Figure 4-5 shows the diagram for this pin. The RA4 pin

is configurable to function as one of the following:

• General purpose I/O

• Analog input for the A/D

• TMR1 gate input

• Crystal/resonator connection

• Clock output

FIGURE 4-5: BLOCK DIAGRAM OF RA4

4.2.3.6 RA5/T1CKI/OSC1/CLKIN

Figure 4-6 shows the diagram for this pin. The RA5 pin

is configurable to function as one of the following:

• General purpose I/O

• TMR1 clock input

• Crystal/resonator connection

• Clock input

FIGURE 4-6: BLOCK DIAGRAM OF RA5

I/O pin

VDD

VSS

VDD

Weak

Data Bus

WPUA

PORTA

TRISA

IOCA

FOSC/4

To A/D Converter

Oscillator

Circuit

OSC1

CLKOUT

Enable

ANS3

RAPU

To T1 G

INTOSC/

RC/EC

(2)

CLK

(1)

Modes

CLKOUT

Enable

Note 1: CLK modes are XT, HS, LP, LPTMR1 and CLKOUT

Enable.

2: With CLKOUT option.

Interrupt-on-

CHANGE

ANS3

RD PORTA

I/O pin

VDD

VSS

VDD

Weak

Data Bus

WPUA

PORTA

TRISA

IOCA

To TMR1 or CLKGEN

INTOSC

Mode

INTOSC

Mode

RAPU

OSC2

(2)

Note 1: CLK modes are XT, HS, LP and LPTMR1.

2: When using Timer1 with LP oscillator, the

Schmitt Trigger is bypassed.

CLK modes

(1)

Interrupt-on-

Change

Oscillator

Circuit

RD PORTA