MC68HC05K1 FREESCALE [Freescale Semiconductor, Inc], MC68HC05K1 Datasheet - Page 92

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

Technical Data
9.5 PEPROM Reading
Technical Data
This sequence shows how to read the PEPROM:
Reading the PEPROM is easiest when each PEPROM column contains
one byte. Selecting a row-0 bit selects the first bit, and incrementing the
PEPROM bit select register (PEBSR) selects the next row-1 bit from the
same column. Incrementing PEBSR seven more times selects the
remaining bits of the column and selects the row-0 bit of the next column,
setting the row-0 flag, PEPRZF.
A PEPROM byte that has been read can be transferred to the
personality EPROM bit select register (PEBSR) so that subsequent
reads of the PEBSR quickly yield that PEPROM byte.
1. Select a bit by writing to PEBSR.
2. Read the PEDATA bit in PESCR.
3. Store the PEDATA bit in RAM or in a register.
4. Select another bit by changing PEBSR.
5. Continue reading and storing the PEDATA bits until the required
Freescale Semiconductor, Inc.
For More Information On This Product,
personality EPROM data is stored.
Personality EPROM (MC68HC05K1 Only)
Go to: www.freescale.com
MC68HC05K0 • MC68HC05K1 — Rev. 2.0