PIC16F636-I/P Microchip Technology Inc., PIC16F636-I/P Datasheet - Page 47

• Manufacturer Part Number: PIC16F636-I/P
• Description: 14 PIN, 3.5 KB FLASH, 128 RAM, 12 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F636-I/P

• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 12
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 14-pin PDIP
• Programmable Memory: 3.5K Bytes
• Ram Size: 128 Bytes
• Speed: 20 MHz
• Timers: 1-8-bit, 1-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

4.2.4.2
Figure 4-2 shows the diagram for this pin. The RA1 pin
is configurable to function as one of the following:
• a general purpose I/O
• an analog input to the comparator
• In-Circuit Serial Programming clock
FIGURE 4-2:
© 2005 Microchip Technology Inc.
Data Bus
WPUDA
WPUDA
PORTA
PORTA
TRISA
TRISA
Note 1:
WDA
WDA
IOCA
IOCA
Interrupt-on-
WR
WR
WR
WR
WR
RD
RD
RD
RD
RD
change
D
D
D
D
D
To Comparator
CK
CK
CK
CK
CK
Comparator mode determines Analog Input mode.
RA1/C1IN-/V
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
Input Mode
BLOCK DIAGRAM OF RA1
Analog
RD PORTA
REF
RAPU
Input Mode
(1)
Analog
/ICSPCLK
Q
Q
EN
EN
(1)
D
D
V
V
DD
SS
V
V
DD
SS
Weak
Weak
I/O pin
Q3
PIC12F635/PIC16F636/639
Preliminary
4.2.4.3
Figure 4-3 shows the diagram for this pin. The RA2 pin
is configurable to function as one of the following:
• a general purpose I/O
• the clock input for TMR0
• an external edge-triggered interrupt
• a digital output from the comparator
FIGURE 4-3:
Data Bus
WPUDA
WPUDA
PORTA
PORTA
TRISA
TRISA
WDA
WDA
IOCA
IOCA
Interrupt-on-
WR
WR
WR
WR
WR
RD
RD
RD
RD
RD
change
D
D
D
D
D
To TMR0
To INT
CK
CK
CK
CK
CK
RA2/T0CKI/INT/C1OUT
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
BLOCK DIAGRAM OF RA2
C1OUT
C1OUT
Enable
RAPU
RD PORTA
Q
Q
1
0
DS41232B-page 45
EN
EN
D
D
V
V
DD
SS
V
V
DD
SS
Weak
Weak
I/O pin
Q3