PIC16F616 Microchip Technology Inc., PIC16F616 Datasheet - Page 39

• Manufacturer Part Number: PIC16F616
• Description: 14-pin Flash-based, 8-bit Cmos Microcontrollers
• Manufacturer: Microchip Technology Inc.

4.2.4.5
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
FIGURE 4-4:
© 2007 Microchip Technology Inc.
Interrupt-on-
RA4/AN3
Note 1: CLK modes are XT, HS, LP, TMR1 LP and CLKOUT Enable.
Change
2: With CLKOUT option.
3: Analog Input mode comes from ANSEL.
4: Set has priority over Reset.
5: PIC16F616/16HV616 only.
BLOCK DIAGRAM OF RA4
Write ‘0’ to RAIF
(1)
/T1G/OSC2/CLKOUT
(1)
Q
S
R
(4)
Data Bus
PORTA
PORTA
WPUA
WPUA
TRISA
TRISA
IOCA
IOCA
PIC16F610/616/16HV610/616
WR
WR
WR
WR
RD
RD
RD
RD
RA<5, 3:0> pins
From other
Preliminary
D
D
D
D
CK
CK
CK
CK
Q
Q
Q
Q
Q
Q
Q
Q
To T1G
To A/D Converter
• a Timer1 gate (count enable)
• a crystal/resonator connection
• a clock output
Note 1: PIC16F616/16HV616 only.
Input Mode
Analog
OSC1
F
(5)
OSC
RC/EC
INTOSC/
CLKOUT
CLKOUT
Enable
(3)
Enable
Input Mode
/4
RD PORTA
RAPU
CLKOUT
Analog
Enable
Oscillator
Circuit
Modes
Q
Q
1
0
(2)
CLK
EN
EN
(1)
D
D
V
DD
Weak
V
V
Q1
DD
SS
I/O Pin
DS41288C-page 37