PIC16F631-I/P Microchip Technology Inc., PIC16F631-I/P Datasheet - Page 66

• Manufacturer Part Number: PIC16F631-I/P
• Description: MCU, 8-Bit, 1KW Flash, 64 RAM, 18 I/O, PDIP-20
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F631-I/P

• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 128 Bytes
• Input Output: 18
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 20-pin PDIP
• Programmable Memory: 1.75K Bytes
• Ram Size: 64 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

PIC16F631/677/685/687/689/690
4.2.5
Each PORTA pin is multiplexed with other functions. The
pins and their combined functions are briefly described
here. For specific information about individual functions
such as the comparator or the A/D Converter (ADC),
refer to the appropriate section in this data sheet.
FIGURE 4-1:
DS41262D-page 64
PIN DESCRIPTIONS AND
DIAGRAMS
Interrupt-on-Change
Data Bus
WPUDA
WPUDA
PORTA
PORTA
Note 1:
TRISA
TRISA
IOCA
IOCA
WR
RD
WR
WR
WR
RD
RD
RD
BLOCK DIAGRAM OF RA0
2:
D
D
D
D
ANSEL determines Analog Input mode.
Not implemented on PIC16F631.
CK
CK
CK
CK
Q
Q
Q
Q
Q
Q
Q
Q
To A/D Converter
To Comparator
RD PORTA
Input Mode
Analog
(2)
Q
Q
(1)
Input Mode
Analog
EN
EN
4.2.5.1
Figure 4-2 shows the diagram for this pin. The
RA0/AN0/C1IN+/ICSPDAT/ULPWU pin is configurable
to function as one of the following:
• a general purpose I/O
• an analog input for the ADC (except PIC16F631)
• an analog input to Comparator C1
• In-Circuit Serial Programming™ data
• an analog input for the Ultra Low-Power Wake-up
D
D
0
(1)
RABPU
1
Q3
+
-
RA0/AN0/C1IN+/ICSPDAT/ULPWU
ULPWUE
V
Weak
DD
I
ULP
V
SS
© 2007 Microchip Technology Inc.
V
T
V
V
DD
SS
I/O Pin