Part Number:BQ3285
I need find replacement for MC146818 with internal oscillator circuit (only external quartz crystal is required) and pin for battery.
I have tried DS12885 but it don't support read-write (modify) bus cycle: latch address, read data and write data without latch address again.
MC146818 support it, but DS12885 ignore the data write.
Does BQ3285 support this bus cycle?
picture with timing the read-write (modify) bus cycle: 