PIC16F688-I/P Microchip Technology Inc., PIC16F688-I/P Datasheet - Page 39

• Manufacturer Part Number: PIC16F688-I/P
• Description: 14 PIN, 7 KB FLASH, 256 RAM, 12 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC16F688-I/P

• A/d Inputs: 8-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 5 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 12
• Interface: USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 14-pin PDIP
• Programmable Memory: 7K Bytes
• Ram Size: 256 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

4.2.5
Each PORTA pin is multiplexed with other functions.
The pins and their combined functions are briefly
described here. For specific information about individ-
ual functions such as the comparator or the A/D, refer
to the appropriate section in this data sheet.
FIGURE 4-1:
© 2006 Microchip Technology Inc.
PIN DESCRIPTIONS AND
DIAGRAMS
Data Bus
WPUDA
WPUDA
PORTA
PORTA
TRISA
TRISA
WR
IOCA
IOCA
RD
Interrupt-on-
WR
WR
WR
RD
RD
RD
Note 1:
Change
BLOCK DIAGRAM OF RA0
D
D
D
D
CK
CK
CK
CK
Comparator mode and ANSEL determines analog Input mode.
Q
Q
Q
Q
Q
Q
Q
Q
To Comparator
To A/D Converter
RD PORTA
Input Mode
Analog
Q
Q
(1)
Input Mode
Analog
EN
EN
D
D
0
4.2.5.1
Figure 4-1 shows the diagram for this pin. The RA0 pin
is configurable to function as one of the following:
• a general purpose I/O
• an analog input for the A/D
• an analog input to the comparator
• an analog input to the Ultra Low-Power Wake-up
• In-Circuit Serial Programming™ data
(1)
RAPU
1
Q3
+
-
ULPWUE
V
Weak
RA0/AN0/C1IN+/ICSPDAT/ULPWU
DD
I
Vss
ULP
V
T
PIC16F688
V
V
DD
SS
I/O PIN
DS41203B-page 37