Datasheet

PIC10(L)F320/322
DS41585A-page 156 Preliminary  2011 Microchip Technology Inc.
22.2 Low-Voltage Programming Entry
Mode
The Low-Voltage Programming Entry mode allows the
PIC10(L)F320/322 devices to be programmed using
VDD only, without high voltage. When the LVP bit of
Configuration Word 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 V
IL 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 5.3 “Low-Power
Brown-out Reset (LPBOR)” for more information.
The LVP bit can only be reprogrammed to ‘0’ by using
the High-Voltage Programming mode.
22.3 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 22-2.
FIGURE 22-2: ICD RJ-11 STYLE
CONNECTOR INTERFACE
Another connector often found in use with the PICkit™
programmers is a standard 6-pin header with 0.1 inch
spacing. Refer to Figure 22-3.
FIGURE 22-3: PICkit™ STYLE CONNECTOR INTERFACE
1
2
3
4
5
6
Target
Bottom Side
PC Board
VPP/MCLR
VSS
ICSPCLK
V
DD
ICSPDAT
NC
Pin Description*
1 = V
PP/MCLR
2 = VDD Target
3 = V
SS (ground)
4 = ICSPDAT
5 = ICSPCLK
6 = No Connect
1
2
3
4
5
6
* The 6-pin header (0.100" spacing) accepts 0.025" square pins.
Pin Description*
1 = V
PP/MCLR
2 = VDD Target
3 = V
SS (ground)
4 = ICSPDAT
5 = ICSPCLK
6 = No Connect
Pin 1 Indicator