PIC18F1220 MICROCHIP [Microchip Technology], PIC18F1220 Datasheet - Page 191

• Manufacturer Part Number: PIC18F1220
• Description: 18/20/28-Pin High-Performance, Enhanced Flash Microcontrollers with 10-bit A/D and nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

19.9
The LVP bit in configuration register, CONFIG4L,
enables Low-Voltage Programming (LVP). When LVP
is enabled, the microcontroller can be programmed
without requiring high voltage being applied to the
MCLR/V
dedicated to controlling Program mode entry and is not
available as a general purpose I/O pin.
LVP is enabled in erased devices.
While programming using LVP, V
MCLR/V
enter Programming mode, V
pin.
 2004 Microchip Technology Inc.
Note 1: High-voltage programming is always
PP
PP
2: When
3: When LVP is enabled, externally pull the
Low-Voltage ICSP Programming
/RA5 pin, but the RB5/PGM/KBI1 pin is then
/RA5 pin as in normal execution mode. To
available, regardless of the state of the
LVP bit or the PGM pin, by applying V
to the MCLR pin.
enabled, the RB5 pin can no longer be
used as a general purpose I/O pin.
PGM pin to V
execution.
Low-Voltage
SS
DD
to allow normal program
is applied to the PGM
DD
Programming
is applied to the
IHH
is
If Low-Voltage Programming mode will not be used, the
LVP bit can be cleared and RB5/PGM/KBI1 becomes
available as the digital I/O pin RB5. The LVP bit may be
set or cleared only when using standard high-voltage
programming (V
Once LVP has been disabled, only the standard high-
voltage programming is available and must be used to
program the device.
Memory that is not code-protected can be erased,
using either a Block Erase, or erased row by row, then
written at any specified V
is to be erased, a Block Erase is required. If a Block
Erase is to be performed when using Low-Voltage
Programming, the device must be supplied with V
4.5V to 5.5V.
PIC18F1220/1320
IHH
applied to the MCLR/V
DD
. If code-protected memory
DS39605C-page 189
PP
/RA5 pin).
DD
of