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| | & | T^- - 25c T5C | ?5'c | | |
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| | | | | SUPPL'( VCH T\OrE V' (V) | BIAS CURRENT-TEMPERATURE |
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Bus control with memory expansion The 3802 group has a built-in ONW function to facilitate access to external memory and l/0 devices in memory expansion mode or microprocessor mode. If an "L" level signal is input to the ONW pin when the CPU is in a read or write state, the corresponding read or write cycle is ex- tended by one cycle of +. During this extended period, the RD or WR signal remains at "L". This extension period is valid only for writing to and reading from addresses 000016 t0 000716 and 044016 to FFFF16 in microprocessor mode, 044016 to YYYY16 in memory expansion mode, and only read and write cycles are ex- tended.
