PIC16LF1503 Datasheet, PDF (267/340 Pages) Microchip Technology – 14-Pin Flash, 8-Bit Microcontrollers

PIC16(L)F1503
26.2 Low-Voltage Programming Entry
Mode
The Low-Voltage Programming Entry mode allows the
PIC16(L)F1503 devices to be programmed using VDD
only, without high voltage. When the LVP bit of
Configuration Words is set to ‘1’, the low-voltage ICSP
programming entry is enabled. To disable the
Low-Voltage ICSP mode, the LVP bit must be
programmed to ‘0’.
Entry into the Low-Voltage Programming Entry mode
requires the following steps:
1. MCLR is brought to VIL.
2. A 32-bit key sequence is presented on
ICSPDAT, while clocking ICSPCLK.
Once the key sequence is complete, MCLR must be
held at VIL for as long as Program/Verify mode is to be
maintained.
If low-voltage programming is enabled (LVP = 1), the
MCLR Reset function is automatically enabled and
cannot be disabled. See Section 6.4 “MCLR” for more
information.
The LVP bit can only be reprogrammed to ‘0’ by using
the High-Voltage Programming mode.
26.3 Common Programming Interfaces
Connection to a target device is typically done through
an ICSP™ header. A commonly found connector on
development tools is the RJ-11 in the 6P6C (6 pin, 6
connector) configuration. See Figure 26-2.
FIGURE 26-2:
ICD RJ-11 STYLE
CONNECTOR INTERFACE
ICSPDAT
VDD
2 4 6 NC
ICSPCLK
13 5
Target
VPP/MCLR
VSS
PC Board
Bottom Side
Pin Description*
1 = VPP/MCLR
2 = VDD Target
3 = VSS (ground)
4 = ICSPDAT
5 = ICSPCLK
6 = No Connect
Another connector often found in use with the PICkit™
programmers is a standard 6-pin header with 0.1 inch
spacing. Refer to Figure 26-3.
FIGURE 26-3:
PICkit™ PROGRAMMER STYLE CONNECTOR INTERFACE
Pin 1 Indicator
Pin Description*
1
1 = VPP/MCLR
2
3
2 = VDD Target
4
3 = VSS (ground)
5
6
4 = ICSPDAT
5 = ICSPCLK
6 = No Connect
* The 6-pin header (0.100" spacing) accepts 0.025" square pins.
 2011 Microchip Technology Inc.
Preliminary
DS41607A-page 267