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| PIC18LF2XK22 Datasheet, PDF (1/42 Pages) Microchip Technology – Flash Memory Programming Specification | |||
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PIC18(L)F2XK22/4XK22
Flash Memory Programming Specification
1.0 DEVICE OVERVIEW
This document includes the programming
specifications for the following devices:
⢠PIC18F23K22
⢠PIC18F24K22
⢠PIC18F25K22
⢠PIC18F26K22
⢠PIC18F43K22
⢠PIC18F44K22
⢠PIC18F45K22
⢠PIC18F46K22
⢠PIC18LF23K22
⢠PIC18LF24K22
⢠PIC18LF25K22
⢠PIC18LF26K22
⢠PIC18LF43K22
⢠PIC18LF44K22
⢠PIC18LF45K22
⢠PIC18LF46K22
2.0 PROGRAMMING OVERVIEW
The PIC18(L)F2XK22/4XK22 devices can be
programmed using either the high-voltage In-Circuit
Serial Programming⢠(ICSPâ¢) method or the low-
voltage ICSP method. Both methods can be done with
the device in the usersâ system. The low-voltage ICSP
method is slightly different than the high-voltage
method and these differences are noted where
applicable. This programming specification applies to
the PIC18(L)F2XK22/4XK22 devices in all package
types.
2.1 Hardware Requirements
In High-Voltage ICSP mode, the PIC18(L)F2XK22/
4XK22 devices require two programmable power
supplies: one for VDD and one for MCLR/VPP/RE3.
Both supplies should have a minimum resolution of
0.25V. Refer to Section 6.0 âAC/DC Characteristics
Timing Requirements for Program/Verify Test
Modeâ for additional information.
2.1.1
LOW-VOLTAGE ICSP
PROGRAMMING
In Low-Voltage ICSP mode, the PIC18(L)F2XK22/
4XK22 devices can be programmed using a single VDD
source in the operating range. The MCLR/VPP/RE3
does not have to be brought to a different voltage, but
can instead be left at the normal operating voltage.
Refer to Section 2.6 âEntering and Exiting Low-
Voltage ICSP Program/Verify Modeâ for additional
hardware parameters.
Note 1: The High-Voltage ICSP mode is always
available, regardless of the state of the
LVP bit, by applying VIHH to the MCLR/
VPP/RE3 pin.
2: While in Low-Voltage ICSP mode, MCLR
is always enabled, regardless of the
MCLRE bit, and the RE3 pin can no
longer be used as a general purpose
input.
ï£ 2010 Microchip Technology Inc.
Advance Information
DS41398B-page 1
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