I have a micro-Drive that was working but is now resetting itself every time I try to send an auto-baud command ('U').
My software applies power to the micro-Drive (separate power supply), waits 0.75 s then sends an auto-baud command. If no response is received, then the auto-baud command is resent every 0.5 s or if the micro-Drive Tx line drops (interpreted as a "break" or some sort of error by the receiving UART).
Monitoring the reset, transmit and receive pins shows the micro-Drive applying a reset after every auto-baud is sent. Our circuit board with the micro-Drive does have the capability to drive the reset circuit through a transistor with the collector connected to the reset pin, but I have confirmed that the transistor is not been driven on a DSO.
A second board with the same software is working fine.
Assistance would be appreciated.
Regards,
Michael
My software applies power to the micro-Drive (separate power supply), waits 0.75 s then sends an auto-baud command. If no response is received, then the auto-baud command is resent every 0.5 s or if the micro-Drive Tx line drops (interpreted as a "break" or some sort of error by the receiving UART).
Monitoring the reset, transmit and receive pins shows the micro-Drive applying a reset after every auto-baud is sent. Our circuit board with the micro-Drive does have the capability to drive the reset circuit through a transistor with the collector connected to the reset pin, but I have confirmed that the transistor is not been driven on a DSO.
A second board with the same software is working fine.
Assistance would be appreciated.
Regards,
Michael
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