MC68HC705J1A Motorola, MC68HC705J1A Datasheet - Page 39

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MC68HC705J1A

Manufacturer Part Number
MC68HC705J1A
Description
Manufacturer
Motorola
Datasheet

Specifications of MC68HC705J1A

Case
DIP-20L
2.6.2 EPROM Programming Register
The EPROM programming register (EPROG) contains the control bits
for programming the EPROM/OTPROM.
Address:
Read:
Write:
Reset:
ELAT — EPROM Bus Latch Bit
This read/write bit latches the address and data buses for
EPROM/OTPROM programming. Clearing the ELAT bit automatically
clears the EPGM bit. EPROM/OTPROM data cannot be read while
the ELAT bit is set. Reset clears the ELAT bit.
MPGM — MOR Programming Bit
This read/write bit applies programming power from the IRQ/V
to the mask option register. Reset clears MPGM.
EPGM — EPROM Programming Bit
This read/write bit applies the voltage from the IRQ/V
EPROM. To write the EPGM bit, the ELAT bit must be set already.
Reset clears EPGM.
MC68HC705J1A — Rev. 4.0
MOTOROLA
$0018
Bit 7
6
5
0
0
0
R
R
0
0
0
= Unimplemented
Figure 2-3. EPROM Programming Register (EPROG)
1 = Address and data buses configured for EPROM/OTPROM
programming the EPROM
0 = Address and data buses configured for normal operation
1 = Programming voltage applied to MOR
0 = Programming voltage not applied to MOR
1 = Programming voltage (IRQ/V
0 = Programming voltage (IRQ/V
Memory
EPROM/OTPROM
4
3
2
1
0
0
ELAT
MPGM
R
R
0
0
0
0
R = Reserved
pin to the
PP
pin) applied to EPROM
PP
pin) not applied to EPROM
PP
Technical Data
Memory
Bit 0
EPGM
0
pin
PP
39

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