MC68HC05K1 FREESCALE [Freescale Semiconductor, Inc], MC68HC05K1 Datasheet - Page 90

• Manufacturer Part Number: MC68HC05K1
• Description: HCMOS Microcontroller Unit
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Technical Data
9.4 PEPROM Programming
Technical Data
NOTE:
NOTE:
Factory-provided software for programming the PEPROM is available
through the Motorola Web site at:
The circuit shown in
with the factory-provided programming software.
The personality EPROM cannot be erased in parts offered without the
windowed package.
To program the PEPROM, V
The PEPROM also can be programmed by user software with V
applied to the IRQ/V
PEPROM bit:
While the PEPGM bit is set and V
access bits that are to be left unprogrammed (erased).
In the 3-pin RC oscillator configuration, the PEPROM cannot be
programmed by user software. If the voltage on IRQ/V
V
device operation will be disrupted. The 2-pin RC and crystal
configurations are not affected.
DD
1. Select a PEPROM bit by writing to PEBSR.
2. Set the PEPGM bit in PESCR.
3. Wait 3 ms.
4. Clear the PEPGM bit.
htt://mcu.motsps.com
Freescale Semiconductor, Inc.
, the oscillator will revert to a 2-pin oscillator configuration and
For More Information On This Product,
Personality EPROM (MC68HC05K1 Only)
Go to: www.freescale.com
PP
Figure 9-4
pin. This sequence shows how to program each
DD
must be greater than 4.5 Vdc.
can be used to program the PEPROM
PP
is applied to the IRQ/V
MC68HC05K0 • MC68HC05K1 — Rev. 2.0
PP
is raised above
PP
pin, do not
PP