MC68HC705K1 Datasheet, PDF (93/140 Pages) Freescale Semiconductor, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Personality EPROM (PEPROM)
PEPROM Registers
10.3 PEPROM Registers
Two input/output (I/O) registers control programming and reading of the
PEPROM:
• PEPROM bit select register (PEBSR)
• PEPROM status and control register (PESCR)
10.3.1 PEPROM Bit Select Register
The PEPROM bit select register (PEBSR) selects one of 64 bits in the
PEPROM array. Reset clears all the bits in the PEPROM bit select
register.
Address: $000E
Bit 7
6
5
4
3
2
1
Read:
PEB7
Write:
PEB6
PEB5
PEB4
PEB3
PEB2
PEB1
Reset: 0
0
0
0
0
0
0
Figure 10-2. PEPROM Bit Select Register (PEBSR)
Bit 0
PEB0
0
PEB7 and PEB6 — Not Connected to the PEPROM Array
These read/write bits are available as storage locations. Reset clears
PEB7 and PEB6.
PEB5–PEB0 — PEPROM Bit Select Bits
These read/write bits select one of 64 bits in the PEPROM as shown
in Table 10-1. Bits PEB2–PEB0 select the PEPROM row, and bits
PEB5–PEB3 select the PEPROM column. Reset clears PEB5–PEB0,
selecting the PEPROM bit in row zero, column zero.
MC68HC705K1 — Rev. 2.0
Personality EPROM (PEPROM)
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Technical Data