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| PIC16F610 Datasheet, PDF (39/180 Pages) Microchip Technology – 14-Pin, Flash-Based 8-Bit CMOS Microcontrollers | |||
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PIC16F610/616/16HV610/616
4.2.4.5 RA4/AN3(1)/T1G/OSC2/CLKOUT
Figure 4-4 shows the diagram for this pin. The RA4 pin
is configurable to function as one of the following:
⢠a general purpose I/O
⢠an analog input for the ADC(1)
⢠a Timer1 gate (count enable)
⢠a crystal/resonator connection
⢠a clock output
Note 1: PIC16F616/16HV616 only.
FIGURE 4-4:
BLOCK DIAGRAM OF RA4
Data Bus
DQ
WR
WPUA
CK Q
Analog(3)
Input Mode CLK(1)
Modes
VDD
Weak
RD
WPUA
RAPU
Oscillator
Circuit
OSC1
CLKOUT
Enable
DQ
WR
PORTA
CK Q
WR
TRISA
DQ
CK Q
RD
TRISA
RD
PORTA
DQ
WR
IOCA
CK Q
RD
IOCA
FOSC/4 1
0
CLKOUT
Enable
INTOSC/
RC/EC(2)
CLKOUT
Enable
Analog
Input Mode
QD
EN
QD
Interrupt-on-
Change
Q S(4)
R
Write â0â to RAIF
EN
From other
RA<5, 3:0> pins
To T1G
To A/D Converter(5)
RD PORTA
Note 1: CLK modes are XT, HS, LP, TMR1 LP and CLKOUT Enable.
2: With CLKOUT option.
3: Analog Input mode comes from ANSEL.
4: Set has priority over Reset.
5: PIC16F616/16HV616 only.
VDD
I/O Pin
VSS
Q1
© 2007 Microchip Technology Inc.
Preliminary
DS41288C-page 37
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