PIC16F688-E/P Microchip Technology, PIC16F688-E/P Datasheet - Page 489

• Manufacturer Part Number: PIC16F688-E/P
• Description: IC MCU PIC FLASH 4KX14 14DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F688-E/P

• Program Memory Type: FLASH
• Program Memory Size: 7KB (4K x 14)
• Package / Case: 14-DIP (0.300", 7.62mm)
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: UART/USART
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 12
• 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
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SCI/USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 2
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 125 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DM163014, DM164120-4
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: AC162066 - HEADER INTRFC MPLAB ICD2 20PINAC162061 - HEADER INTRFC MPLAB ICD2 20PINDM163029 - BOARD PICDEM FOR MECHATRONICSAC162056 - HEADER INTERFACE ICD2 16F688ACICE0207 - MPLABICE 14P 300 MIL ADAPTER
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Section 26. Watchdog Timer and Sleep Mode
Example 26-1:
Example 26-2:
1997 Microchip Technology Inc.
Changing Prescaler (Timer0 WDT)
Changing Prescaler (WDT Timer0)
To change prescaler from the WDT to the Timer0 module use the sequence shown in
Example
BSF
MOVLW
MOVWF
BCF
CLRF
BSF
MOVLW
MOVWF
CLRWDT
MOVLW
MOVWF
BCF
CLRWDT
BSF
MOVLW
MOVWF
BCF
26-2.
STATUS, RP0
B’xx0x0xxx’
OPTION_REG
STATUS, RP0
TMR0
STATUS, RP0
B’xxxx1xxx’
OPTION_REG
b'xxxx1xxx'
OPTION_REG
STATUS, RP0
STATUS, RP0
b'xxxx0xxx'
OPTION_REG
STATUS, RP0
; Bank1
; Select clock source and postscale value
;
; Bank0
; Clear TMR0 & Prescaler
; Bank1
; Select WDT, do not change prescale value
;
; Clears WDT
; Select new prescale value and WDT
;
; Bank0
; Clear WDT and postscaler
; Bank1
; Select TMR0, new prescale
; value and clock source
; Bank0
other than 1:1
DS31026A-page 26-5
26