MC68HC705J MOTOROLA [Motorola, Inc], MC68HC705J Datasheet - Page 39

• Manufacturer Part Number: MC68HC705J
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

2.6.2 EPROM Programming Register
MC68HC705J1A — Rev. 4.0
MOTOROLA
Address:
The EPROM programming register (EPROG) contains the control bits
for programming the EPROM/OTPROM.
ELAT — EPROM Bus Latch Bit
MPGM — MOR Programming Bit
EPGM — EPROM Programming Bit
Reset:
Read:
Write:
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.
This read/write bit applies programming power from the IRQ/V
to the mask option register. Reset clears MPGM.
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.
1 = Address and data buses configured for EPROM/OTPROM
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
Figure 2-3. EPROM Programming Register (EPROG)
$0018
Bit 7
programming the EPROM
0
0
= Unimplemented
R
6
0
0
Memory
R
5
0
0
R
4
0
0
PP
PP
R = Reserved
pin) applied to EPROM
pin) not applied to EPROM
R
3
0
0
ELAT
2
0
EPROM/OTPROM
PP
MPGM
1
0
pin to the
Technical Data
Memory
PP
EPGM
Bit 0
0
pin
39