PIC16F688-I/STG Microchip Technology, PIC16F688-I/STG Datasheet - Page 520

• 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

PICmicro MID-RANGE MCU FAMILY
28.9
DS31028A-page 28-12
Design Tips
Question 1:
Answer 1:
If the MCLR pin does not rise fast enough, while the device’s voltage is in the valid operating
range, the internal Program Counter (PC) can increment. This means that the PC is no longer
pointing to the address that you expected to be at. The exact location depends on the number of
device clocks that occurred in the valid operating region of the device.
Question 2:
Answer 2:
The voltages / timings may be violated at the device. This could be due to the:
• Application board circuitry
• Cable length from programmer to target
• Large capacitance on V
When I try to do ICSP, the entire program is shifted (offset) in the device
program memory.
I am using a PRO MATE II with a socket that I designed to bring the pro-
gramming signal to my application board. Sometimes when I try to do ICSP,
the program memory is programmed wrong.
DD
which affects levels / timings
1997 Microchip Technology Inc.