Equinox Systems GEMINI Podręcznik Użytkownika Pobierz pdf (Strona 52)

User Guide V1.10

Error: Incorrect Signature ‘0A 0A 0A’

Problem description:

This error occurs only with Philips microcontrollers. If P2.7 of the target microcontroller is

LOW when the device exits the RESET condition, the microcontroller enters a hidden ‘test

mode’.

Fix/workaround:

Ensure that P2.7 is HIGH when the device exits the RESET condition. This is best achieved by

connecting P2.7 to Vcc.

Error: Erratic signature check and programming

Problem description:

Equinox have observed erratic programming operation with some target systems. e.g. the

Philips ISP Board. The behaviour includes incorrect signature reads and failure to program at

random locations.

Fix/workaround:

This problem is caused by a low specification power supply on the target system. If the

target Vcc is noisy or has excessive ripple, the Gemini programmer automatically trips out

and resets itself. The best way to avoid this problem is to ensure that a suitable power supply

plus proper decoupling is used on the target system. A sample circuit is shown in the ‘Target

System - ISP Design Requirements’ section.

Error: Programmer has rebooted

Problem description:

Equinox have observed erratic programming operation with some target systems. e.g. the

Philips ISP Board.

Fix/workaround:

This problem is caused by a low specification power supply on the target system. If the

target Vcc is noisy or has excessive ripple, the Gemini programmer automatically trips out

and resets itself. The best way to avoid this problem is to ensure that a suitable power supply

plus proper decoupling is used on the target system. A sample circuit is shown in the ‘Target

System - ISP Design Requirements’ section.

Error Messages continued

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Equinox Systems GEMINI Podręcznik Użytkownika Strona 52