PCM18XK1 Microchip Technology, PCM18XK1 Datasheet - Page 365

• Manufacturer Part Number: PCM18XK1
• Description: MODULE PROC PIC18F8680,6680,8565
• Manufacturer: Microchip Technology

Specifications of PCM18XK1

• Accessory Type: Processor Module
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• For Use With/related Products: ICE2000
• For Use With: ICE2000 - EMULATOR MPLAB-ICE 2000 POD
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

24.8
The LVP bit in Configuration register, CONFIG4L,
enables Low-Voltage ICSP Programming. This mode
allows the microcontroller to be programmed via ICSP
using a V
only means that V
but can instead be left at the normal operating voltage.
In this mode, the RB5/KBI1/PGM pin is dedicated to the
programming function and ceases to be a general pur-
pose I/O pin. During programming, V
RG5/MCLR/V
must be applied to the RB5/KBI1/PGM pin, provided the
LVP bit is set. The LVP bit defaults to a ‘1’ from the
factory.
 2004 Microchip Technology Inc.
Note 1: The High-Voltage Programming mode is
2: While in Low-Voltage ICSP mode, the
3: When using Low-Voltage ICSP Program-
4: If the device Master Clear is disabled,
Low-Voltage ICSP Programming
DD
source in the operating voltage range. This
always available regardless of the state of
the LVP bit, by applying V
pin.
RB5 pin can no longer be used as a
general purpose I/O pin and should be
held low during normal operation.
ming (LVP) and the pull-ups on PORTB
are enabled, bit 5 in the TRISB register
must be cleared to disable the pull-up on
RB5 and ensure the proper operation of
the device.
verify that either of the following is done to
ensure proper entry into ICSP mode:
a) disable Low-Voltage Programming
b) make certain that RB5/KBI1/PGM is
PP
(CONFIG4L<2> = 0); or
held low during entry into ICSP.
pin. To enter Programming mode, V
PP
does not have to be brought to V
DD
IHH
is applied to the
to the MCLR
PIC18F6585/8585/6680/8680
IHH
DD
If Low-Voltage Programming mode is not used, the LVP
bit can be programmed to a ‘0’ and RB5/KBI1/PGM
becomes a digital I/O pin. However, the LVP bit may
only be programmed when programming is entered
with V
It should be noted that once the LVP bit is programmed
to ‘0’, only the High-Voltage Programming mode is
available and only High-Voltage Programming mode
can be used to program the device.
When using low-voltage ICSP, the part must be sup-
plied 4.5V to 5.5V if a bulk erase will be executed. This
includes reprogramming of the code-protect bits from
an on-state to an off-state. For all other cases of low-
voltage ICSP, the part may be programmed at the
normal operating voltage. This means unique user IDs
or user code can be reprogrammed or added.
IHH
on RG5/MCLR/V
PP
.
DS30491C-page 363