PIC16F688-I/STG Microchip Technology, PIC16F688-I/STG Datasheet - Page 39

• Manufacturer Part Number: PIC16F688-I/STG
• Description: IC PIC MCU FLASH 4KX14 14TSSOP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F688-I/STG

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: UART/USART
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 12
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 14-TSSOP
• For Use With: XLT14SS-1 - SOCKET TRANSITION 14DIP/14SSOPAC162061 - HEADER INTRFC MPLAB ICD2 20PINAC162056 - HEADER INTERFACE ICD2 16F688
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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:
© 2009 Microchip Technology Inc.
PIN DESCRIPTIONS AND
DIAGRAMS
Data Bus
WPUDA
WPUDA
PORTA
PORTA
TRISA
TRISA
WR
IOCA
IOCA
Interrupt-on-
RD
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
DS41203E-page 37