ST2202A
24. APPLICATION CIRCUITS
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Note:ꢀ
1.ꢀTheꢀcapacitorꢀconnectedꢀtoꢀ RESET ꢀ shouldꢀbeꢀofꢀtheꢀvalueꢀnotꢀgreaterꢀthanꢀ
0.01uF.ꢀ
2.ꢀTheꢀresistorꢀinꢀparallelꢀwithꢀtheꢀresetꢀcapacitorꢀhelpsꢀaꢀlotꢀtoꢀgenerateꢀcorrectꢀ
resetꢀsignalꢀandꢀshouldꢀnotꢀbeꢀremoved.ꢀTheꢀdrawbackꢀisꢀanꢀadditionalꢀ
currentꢀofꢀaboutꢀ1.5ꢀuAꢀrises.ꢀ
3.ꢀConnectꢀ OE ꢀ signalꢀofꢀanꢀexternalꢀROMꢀtoꢀ
ꢀ ofꢀST2202ꢀinsteadꢀofꢀGNDꢀ
RD
toꢀpreventꢀconflictꢀofꢀdataꢀbusꢀwhenꢀsoftwareꢀerrorꢀofꢀwritingꢀtoꢀROMꢀoccurs.ꢀ
Verꢀ2.5ꢀ
67
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9/16/2008ꢀ