
2011 Microchip Technology Inc.
Advance Information
DS41409B-page 1
PIC16(L)F720/721
This document includes the
programming specifications for the
following devices:
1.0
OVERVIEW
The PIC16F/LF720 and PIC16F/LF721 devices are
programmed using In-Circuit Serial Programming
(ICSP). This programming specification applies to
the PIC16F/LF720 and PIC16F/LF721 devices in all
packages.
With the exception of memory size and the voltage
regulator, all other aspects of the PIC16F/LF720 and
PIC16F/LF721 devices are identical.
1.1
Hardware Requirements
PIC16F/LF720 and PIC16F/LF721 devices require one
power supply for VDD and one for MCLR/VPP. (See
details.)
1.2
Pin Utilization
Five pins are needed for ICSP programming. The
TABLE 1-1:
PIN DESCRIPTIONS DURING PROGRAMMING
PIC16F720
PIC16LF720
PIC16F721
PIC16LF721
Pin Name
During Programming
Function
Pin Type
Pin Description
RA1
ICSPCLK
I
Clock Input – Schmitt Trigger Input
RA0
ICSPDAT
I/O
Data Input/Output – Schmitt Trigger Input
MCLR/VPP
Program/Verify mode
P(1)
Program Mode Select/Programming power supply
VDD
P
Power Supply
VSS
P
Ground
Legend: I = Input, O = Output, P = Power
Note 1:
To activate the Program/Verify mode, high voltage needs to be applied to MCLR/VPP input. Since the
MCLR /VPP is used for a level source, MCLR/VPP does not draw any significant current.
PIC16(L)F720/721 Flash Memory Programming Specification