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PIC16LF145X Datasheet, PDF (1/38 Pages) Microchip Technology – PIC16(L)F145X Memory Programming Specification | |||
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PIC16(L)F145X
PIC16(L)F145X Memory Programming Specification
This document includes the
programming specifications for the
following devices:
⢠PIC16F1454
⢠PIC16F1455
⢠PIC16F1459
⢠PIC16LF1454
⢠PIC16LF1455
⢠PIC16LF1459
1.0 OVERVIEW
The devices can be programmed using either the high-
voltage In-Circuit Serial Programming⢠(ICSPâ¢)
method or the low-voltage ICSP⢠method.
When using low-voltage ICSP⢠programming
(LVP = 1), the ICSPDAT/ICSPCLK functions are
additionally enabled on the RA0/RA1 port pins. This
legacy programming feature provides compatibility
support for existing PIC18F1XK50 designs. For new
designs, using the ICSPDAT/ICSPCLK functions on
the RC0/RC1 port pins is recommended.
For Legacy Programming Support, refer to
Section 4.2.1 âLegacy ICSP Pinout Programmingâ.
1.1 Hardware Requirements
1.1.1
HIGH-VOLTAGE ICSP
PROGRAMMING
In High-Voltage ICSP⢠mode, these devices require
two programmable power supplies: one for VDD and
one for the MCLR/VPP pin.
1.1.2
LOW-VOLTAGE ICSP
PROGRAMMING
In Low-Voltage ICSP⢠mode, these devices can be
programmed using a single VDD source in the
operating range. The MCLR/VPP pin does not have to
be brought to a different voltage, but can instead be left
at the normal operating voltage.
1.1.2.1 Single-Supply ICSP Programming
The LVP bit in Configuration Word 2 enables single-
supply (low-voltage) ICSP programming. The LVP bit
defaults to a â1â (enabled) from the factory. The LVP bit
may only be programmed to â0â by entering the High-
Voltage ICSP mode, where the MCLR/VPP pin is raised
to VIHH. Once the LVP bit is programmed to a â0â, only
the High-Voltage ICSP mode is available and only the
High-Voltage ICSP mode can be used to program the
device.
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 pin.
2: While in Low-Voltage ICSP mode, MCLR
is always enabled, regardless of the
MCLRE bit, and the port pin can no
longer be used as a general purpose
input.
ï£ 2011-2012 Microchip Technology Inc.
Advance Information
DS41620C-page 1
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