MC68HC05K0 Datasheet, PDF (87/154 Pages) Freescale Semiconductor, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Personality EPROM (MC68HC05K1 Only)
PEPROM Registers
9.3 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)
9.3.1 PEPROM Bit Select Register
The PEPROM bit select register (PEBSR), shown in Figure 9-2, 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 9-2. 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 9-1. 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.
MC68HC05K0 • MC68HC05K1 — Rev. 2.0
Personality EPROM (MC68HC05K1 Only)
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Technical Data