XC68HC705JJ7 Motorola, XC68HC705JJ7 Datasheet - Page 178

• Manufacturer Part Number: XC68HC705JJ7
• Description: MICROCONTROLLER
• Manufacturer: Motorola

Personality EPROM (PEPROM)
12.3.2 PEPROM Status and Control Register
Advance Information
178
Address:
Reset:
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 flag bit when row
zero is selected.
PEDATA — PEPROM Data Bit
PEPGM — PEPROM Program Control Bit
PEPRZF — PEPROM Row Zero Flag
Read:
Write:
Figure 12-3. PEPROM Status and Control Register (PESCR)
This read-only bit is the output state of the PEPROM sense amplifier
and shows the state of the currently selected bit. The state of the
PEDATA bit does not affect the programming of the bit selected by the
PEBSR. Reset does not affect the PEDATA bit.
This read/write bit controls the switches that apply the programming
voltage from the IRQ/V
the PEPGM bit is set, the selected bit cell will be programmed to a
logic 1, regardless of the state of the PEDATA bit. Reset clears the
PEPGM bit.
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
1 = PEPROM data is a logic 1.
0 = PEPROM data is a logic 0.
1 = Programming voltage applied to array bit
0 = Programming voltage not applied to array bit
PEDATA
$000F
Bit 7
U
Personality EPROM (PEPROM)
= Unimplemented
6
0
0
PEPGM
PP
5
0
pin to the selected PEPROM bit cell. When
MC68HC705JJ7 • MC68HC705JP7 — REV 4
R
4
0
0
= Reserved
R
3
0
0
R
2
0
0
U = Unaffected
R
1
0
0
MOTOROLA
PEPRZF
Bit 0
1