PIC16F688T-I/SL Microchip Technology, PIC16F688T-I/SL Datasheet - Page 486

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

Specifications of PIC16F688T-I/SL

• Core Size: 8-Bit
• Program Memory Size: 7KB (4K x 14)
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: UART/USART
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 12
• 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-SOIC (3.9mm Width), 14-SOL
• Controller Family/series: PIC16F
• No. Of I/o's: 12
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 256Byte
• Cpu Speed: 20MHz
• No. Of Timers: 2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• 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, Lead free / RoHS Compliant
• Other names: PIC16F688T-I/SL; PIC16F688T-I/SLTR

PICmicro MID-RANGE MCU FAMILY
26.1
DS31026A-page 26-2
Introduction
The Watchdog Timer (WDT) is a free running on-chip RC oscillator which does not require any
external components. The block diagram is shown in
from the device RC oscillator of the OSC1/CLKIN pin. This means that the WDT will run, even if
the clock on the OSC1 and OSC2 pins has been stopped, for example, by execution of a
instruction.
The Watchdog Timer (WDT) is enabled/disabled by a device configuration bit. If the WDT is
enabled, software execution may not disable this function.
Figure 26-1: Watchdog Timer Block Diagram
WDT Timer
Enable Bit
WDT
From TMR0 Clock Source
Note: PSA and PS2:PS0 are bits in the OPTION register.
0
1
PSA
M
U
X
0
Time-out
Figure
8 - to - 1 MUX
MUX
WDT
Postscaler
1
26-1. This RC oscillator is separate
8
1997 Microchip Technology Inc.
PSA
To TMR0
PS2:PS0
SLEEP