PIC12F1822 MICROCHIP [Microchip Technology], PIC12F1822 Datasheet - Page 316

• Manufacturer Part Number: PIC12F1822
• Description: 8/14-Pin Flash Microcontrollers with nanoWatt XLP Technology
• Manufacturer: MICROCHIP [Microchip Technology]

PIC12F/LF1822/16F/LF1823
27.2
The Low-Voltage Programming Entry mode allows the
PIC12F/LF1822/16F/LF1823
programmed using V
When the LVP bit of Configuration Word 2 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.
2.
Once the key sequence is complete, MCLR must be
held at V
maintained.
If low-voltage programming is enabled (LVP = 1), the
MCLR Reset function is automatically enabled and
cannot be disabled. See Section 7.3 “MCLR” for more
information.
The LVP bit can only be reprogrammed to ‘0’ by using
the High-Voltage Programming mode.
27.3
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 27-2.
FIGURE 27-3:
DS41413A-page 316
MCLR is brought to V
A 32-bit key sequence is presented on
ICSPDAT, while clocking ICSPCLK.
IL
Low-Voltage Programming Entry
Mode
Common Programming Interfaces
for as long as Program/Verify mode is to be
*
DD
PICkit™ STYLE CONNECTOR INTERFACE
The 6-pin header (0.100" spacing) accepts 0.025" square pins.
IL
only, without high voltage.
.
devices
to
Preliminary
be
Pin 1 Indicator
1
2
3
4
5
6
FIGURE 27-2:
Another connector often found in use with the PICkit™
programmers is a standard 6-pin header with 0.1 inch
spacing. Refer to Figure 27-3.
V
PP
V
DD
/MCLR
Pin Description*
1 = V
2 = V
3 = V
4 = ICSPDAT
5 = ICSPCLK
6 = No Connect
Pin Description*
1 = V
2 = V
3 = V
4 = ICSPDAT
5 = ICSPCLK
6 = No Connect
PP
DD
SS
/MCLR
1
Target
(ground)
PP
DD
SS
2
3
/MCLR
4
(ground)
Target
5
V
6
SS
ICSPDAT
ICD RJ-11 STYLE
CONNECTOR INTERFACE
 2010 Microchip Technology Inc.
ICSPCLK
NC
Target
PC Board
Bottom Side