MC68HC708AS48 FREESCALE [Freescale Semiconductor, Inc], MC68HC708AS48 Datasheet - Page 59

• Manufacturer Part Number: MC68HC708AS48
• Description: Advance Information
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

4.4 EPROM/OTPROM Control Register
MC68HC708AS48
MOTOROLA
—
Rev. 4.0
Erasable Programmable Read-Only Memory (EPROM/OTPROM)
Address:
The EPROM control register controls EPROM/OTPROM
programming.
ELAT — EPROM/OTPROM Latch Control Bit
EPGM — EPROM/OTPROM Program Control Bit
Reset:
Read:
Write:
This read/write bit latches the address and data buses for
programming the EPROM/OTPROM. Clearing ELAT also clears the
EPGM bit. EPROM/OTPROM data cannot be read when ELAT is set.
This read/write bit applies the programming voltage from the IRQ/V
pin to the EPROM/OTPROM. To write to the EPGM bit, the ELAT bit
must be set already. Reset clears the EPGM bit.
Figure 4-1. EPROM/OTPROM Control Register (EPMCR)
1 = Buses configured for EPROM/OTPROM programming
0 = Buses configured for normal operation
1 = EPROM/OTPROM programming power switched on
0 = EPROM/OTPROM programming power switched off
$FE07
Bit 7
R
R
0
0
= Reserved
Erasable Programmable Read-Only Memory (EPROM/OTPROM)
R
6
0
0
R
5
0
0
R
4
0
0
EPROM/OTPROM Control Register
R
3
0
0
ELAT
2
0
Advance Information
R
1
0
0
EPGM
Bit 0
0
PP
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