PIC16F688-I/P Microchip Technology Inc., PIC16F688-I/P Datasheet - Page 41

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PIC16F688-I/P

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

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

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4.2.5.4
Figure 4-4 shows the diagram for this pin. The RA3 pin
is configurable to function as one of the following:
• a general purpose input
• as Master Clear Reset with weak pull-up
FIGURE 4-4:
© 2006 Microchip Technology Inc.
PORTA
Data Bus
TRISA
IOCA
IOCA
WR
RD
RD
RD
Interrupt-on-
change
D
CK
RA3/MCLR/V
Q
Q
Reset
MCLRE
BLOCK DIAGRAM OF RA3
V
SS
PP
RD PORTA
MCLRE
Q
Q
MCLRE
EN
EN
D
D
V
DD
Weak
V
SS
Q3
Input
pin
4.2.5.5
Figure 4-5 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 A/D
• a Timer1 gate input
• a crystal/resonator connection
• a clock output
FIGURE 4-5:
Data Bus
TRISA
PORTA
PORTA
WPUA
WPUA
TRISA
IOCA
IOCA
Note 1: CLK modes are XT, HS, LP, LPTMR1 and CLKOUT
WR
WR
WR
WR
RD
RD
RD
RD
Interrupt-on-
change
2: With CLKOUT option.
3: Analog Input mode is ANSEL.
Enable.
D
D
D
D
To T1G
To A/D Converter
CK
CK
CK
CK
RA4/AN3/T1G/OSC2/CLKOUT
Q
Q
Q
Q
Q
Q
Q
Q
Input Mode
BLOCK DIAGRAM OF RA4
Analog
OSC1
Fosc/4
PIC16F688
INTOSC/
RC/EC
CLKOUT
CLKOUT
(3)
Enable
Enable
Input Mode
RAPU
RD PORTA
Analog
CLKOUT
Enable
Oscillator
Circuit
Modes
Q
Q
1
0
(2)
CLK
(3)
EN
EN
(1)
DS41203B-page 39
D
D
V
DD
Weak
V
V
Q3
DD
SS
I/O pin

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