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FUNCTION The M5M5W416CWG is organized as 262144-words by 16-bit. These devices operate on a single +1.65~2.3V power supply, and are directly TTL compatible to both input and output. Its fully static circuit needs no clocks and no refresh, and makes it useful. The operation mode are determined by a combination of the device control inputs BCl , BC2 , S1, S2 , W and OE. Each mode is summarized in the function table. A write operation is executed whenever the low level W overlaps with the low level BCl and/or BC2 and the low level Sl and the high level S2. The address(AO~A17) must be set up before the write cycle and must be stable during the entire cycle. A read operation is executed by setting W at a high level and OE at a low level while BCl and/or BC2 and S1 and S2 are in an active state(S1=L,S2=H). When setting BCl at the high level and other pins are in an activ e stage , upper-by te are in a selectable mode in which both reading and writing are enabled, and lower- byte are in a non-selectable mode. And when setting BC2 at a high level and other pins are in an active stage, lower-byte are in a selectable mode and upper- byte are in a non-selectable mode.
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