MC68HC705C8A_13 Datasheet, PDF (110/222 Pages) Freescale Semiconductor, Inc – Technical Data

Freescale Semiconductor, Inc.
EPROM/OTPROM (PROM)
9.3.2 Preprogramming Steps
NOTE:
Before programming the PROM using an MC68HC05PGMR PCB in
standalone mode, the user should ensure that:
• 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_DD of +5 Vdc is available on the board.
• V_PP is available on the board.
If the V_PP level at the MCU exceeds +16 Vdc, then the MC68HC705C8A
MCU device will suffer permanent damage.
Once those conditions are met, the user should take these steps before
beginning programming:
1. Remove the V_PP power source.
2. Set switch 1 in the OFF position (removes V_DD).
3. Place the programmed EPROM in socket U1.
4. Insert the erased PROM MCU device to be programmed in the
proper socket:
– MC68HC705C8S or MC68HC705C8P in socket U2 (40-pin
dual in-line package (DIP)) or
– MC68HC705C8FN in socket U3 (44-pin plastic leaded chip
carrier (PLCC)) with the device notch at the upper right corner
of the socket.
5. Set switch S2 in the RESET position.
NOTE: No PROM MCU should be inserted in or removed from its board socket
(U2 or U3) while V_PP (P1, slot 5) or V_DD (switch 1) is active on the board.
Technical Data
110
EPROM/OTPROM (PROM)
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MC68HC705C8A — Rev. 3