The IDB-HC08JK Evaluation Board demonstrates the capabilities of the 20-pin MC68HC908JK devices. The IDB-HC08JK Evaluation Board can be used as a standalone application or with an emulator system, such as inDART-HC08, through a MON08-compatible connection.
The IDB-HC08JK Evaluation Board demonstrates the capabilities of the 20‑pin MC68HC908JK devices. It includes an MC68HC908JK3 microcontroller in a DIP20 package, a ZIF socket, a MONO8 connector, eight low‑current LEDs, a potentiometer, push‑button switches, a 16‑MHz crystal oscillator, and power‑supply connectors for both unregulated (9‑12 V) and regulated (5 V) sources.
The board can operate in standalone mode, where the pre‑programmed demo application runs and displays A/D conversion results on the LEDs, or in host mode with a MONO8‑based emulator/programmer such as SofTec’s inDART‑HC08. Standalone mode requires specific jumper settings and power‑supply selection, while host mode requires removing the MONO8 jumpers and connecting the emulator’s cable to the board’s J1 connector.
| Microcontroller | MC68HC908JK3 in DIP20 package |
|---|---|
| Socket | ZIF socket for the microcontroller |
| LEDs | Eight high‑efficiency (low‑current) LEDs |
| Crystal Oscillator | 16‑MHz crystal oscillator |
| Unregulated Power Input | 9‑12 V DC, 200 mA connector (UNREG. VDD) |
| Potentiometer | Potentiometer with jumper to PTD2 |
| Reset Switch | Push‑button switch connected to RESET |
Remove the jumpers in the MONO8 connector, connect the emulator’s MONO8 cable to the board’s J1 connector, and do not use the J2 connector.
The board supports MC68HC908JK1, MC68HC908JK3, and any future MC68HC908UJK family pin‑to‑pin compatible devices.