MC68HC705 MOTOROLA [Motorola, Inc], MC68HC705 Datasheet - Page 108

• Manufacturer Part Number: MC68HC705
• Description: HCMOS Microcontroller Unit
• Manufacturer: MOTOROLA [Motorola, Inc]

EPROM/OTPROM (PROM)
9.3.2 Preprogramming Steps
Technical Data
108
NOTE:
NOTE:
Before programming the PROM using an MC68HC05PGMR PCB in
standalone mode, the user should ensure that:
If the V
MCU device will suffer permanent damage.
Once those conditions are met, the user should take these steps before
beginning programming:
No PROM MCU should be inserted in or removed from its board socket
(U2 or U3) while V
1. Remove the V
2. Set switch 1 in the OFF position (removes V
3. Place the programmed EPROM in socket U1.
4. Insert the erased PROM MCU device to be programmed in the
5. Set switch S2 in the RESET position.
•
•
•
•
•
A jumper is installed on pins 1 and 2 of mode select header J1.
An EPROM is programmed with the necessary user code.
The erasure window (if any) of the device to be programmed is
covered.
V
V
proper socket:
– MC68HC705C8S or MC68HC705C8P in socket U2 (40-pin
– MC68HC705C8FN in socket U3 (44-pin plastic leaded chip
PP
DD
PP
dual in-line package (DIP)) or
carrier (PLCC)) with the device notch at the upper right corner
of the socket.
level at the MCU exceeds +16 Vdc, then the MC68HC705C8A
is available on the board.
of +5 Vdc is available on the board.
EPROM/OTPROM (PROM)
PP
PP
(P1, slot 5) or V
power source.
DD
(switch 1) is active on the board.
MC68HC705C8A — Rev. 2.0
DD
).
MOTOROLA