mc68hc705k1 Freescale Semiconductor, Inc, mc68hc705k1 Datasheet - Page 95

• Manufacturer Part Number: mc68hc705k1
• Description: Hcmos Microcontroller Unit
• Manufacturer: Freescale Semiconductor, Inc

10.3.2 PEPROM Status and Control Register
MC68HC705K1 — Rev. 2.0
Address:
The PEPROM status and control register (PESCR) controls the
PEPROM programming voltage. This register also transfers the
PEPROM bits to the internal data bus and contains a row zero flag.
PEDATA — PEPROM Data Bit
PEPGM — PEPROM Program Control Bit
PEPRZF — PEPROM Row Zero Flag
Reset:
Read: PEDATA
Write:
This read-only bit is the state of the PEPROM sense amplifier and
shows the state of the currently selected bit. Reset does not affect the
PEDATA bit.
This read/write bit controls the switches that apply the programming
voltage, V
This read-only bit is set when the PEPROM bit select register selects
the first row (row zero) of the PEPROM array. Selecting any other row
clears PEPRZF. Monitoring PEPRZF can reduce the code needed to
access one byte of PEPROM. Reset sets PEPRZF.
Freescale Semiconductor, Inc.
Figure 10-3. PEPROM Status and Control Register (PESCR)
For More Information On This Product,
1 = PEPROM data logic 1
0 = PEPROM data logic 0
1 = Programming voltage applied
0 = Programming voltage not applied
1 = Row zero selected
0 = Row zero not selected
$000F
Bit 7
U
Personality EPROM (PEPROM)
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PP
= Unimplemented
, to the selected PEPROM cell. Reset clears PEPGM.
6
0
0
PEPGM
5
0
U = Unaffected
4
0
0
3
0
0
Personality EPROM (PEPROM)
2
0
0
PEPROM Registers
1
0
0
Technical Data
PEPRZF
Bit 0
1