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My company is using Philips 8031 chip. The new batch of chips we received, every one of them keeps reseting itself when when it come accross the PRINTF statement !!! The c-code works fine with the old 8031 chip !! Does anybody in this forum experience such problem? The PRINTF statement we are using is to send out a stream of characters to the RS232 port. It is a SOFTWARE routine, we are not used the built-in UART, could this be the problem? however, I was very confused why the old chip works !!! Thanks in advance, any helps or suggestions are veru appreciated.
The following enhancements that were not present in the original 80c31 may be the cause of your problem: Dual Data Pointers 4 level priority interrupt 6 interrupt sources Full-duplex enhanced UART Framing error detection Low EMI (inhibit ALE ) e.g. if you have a write to the sfr controlling which data pointer is used, that would not have had any effect in the older 8031s. Have fun, Erik