PIC16F688T-E/SL Microchip Technology, PIC16F688T-E/SL Datasheet - Page 41

• Manufacturer Part Number: PIC16F688T-E/SL
• Description: IC MCU PIC FLASH 4KX14 14SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F688T-E/SL

• 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 ~ 125°C
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• For Use With: XLT14SO-1 - SOCKET TRANSITION 14SOIC 150/208AC162061 - HEADER INTRFC MPLAB ICD2 20PINAC162056 - HEADER INTERFACE ICD2 16F688
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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:
© 2009 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
RC/EC
INTOSC/
CLKOUT
CLKOUT
(3)
Enable
Enable
Input Mode
RAPU
Analog
RD PORTA
CLKOUT
Enable
Oscillator
Circuit
Modes
Q
Q
1
0
(2)
CLK
(3)
EN
EN
(1)
DS41203E-page 39
D
D
V
DD
Weak
V
V
SS
Q3
DD
I/O pin