erratic behavior with a Rohm DA converter

comp.arch.embedded erratic behavior with a Rohm DA converter

A Rohm BU2507, a six channel da converter, is used for setting bias points and gain for several op amps. The settings for each dac are transmitted by a microcontroller. Rohm's converter works very well... most of the time. Occassionaly, though, the output will be 0 volts instead of what is expected. A conceivable cause could be a time out action taken by Rohm's device when a data transmission is interupted by an interupt within the microcontroller. This is pure guessing, however. Is anyone familiar with this device seen such trouble? If so, do leave a message here if you have any suggestions.

Hul

comp.arch.embedded erratic behavior with a Rohm DA converter

A Rohm BU2507, a six channel da converter, is used for setting bias points and gain for several op amps. The settings for each dac are transmitted by a microcontroller. Rohm's converter works very well... most of the time. Occassionaly, though, the output will be 0 volts instead of what is expected. A conceivable cause could be a time out action taken by Rohm's device when a data transmission is interupted by an interupt within the microcontroller. This is pure guessing, however. Is anyone familiar with this device seen such trouble? If so, do leave a message here if you have any suggestions.

Hul

Maybe if you ask a *fourth* time you will get an answer? :-/

Better still instead of posting to probably several groups multiple times, read the datasheet multiple times and look for ALL conditions that could cause this to happen.

Personally I think it is on the edge circuit/software design.

bias

device

leave

It looks like he took your advise.