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參數(shù)資料
| 型號： | TC83220-0027 |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP42 |
| 封裝： | 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-42 |
| 文件頁數(shù)： | 6/16頁 |
| 文件大?。?/td> | 261K |
| 代理商： | TC83220-0027 |
TC83220-0027
2003-03-12
14
The Proposal of Outer Circuit for Tax Rate Holding with Back-Up Battery
Note 9: V1 = 3 V: Battery supply
V2 = 5 V: AC supply
~HOLD pin is pulled down in the LSI, but normally pulled up to VDD.
~RESET pin is pulled up to VDD.
(1)
Setting POWER SW to ON, V2 is supplied to VDD pin, and also to HOLD pin.
Then calculator operates normally.
(2)
Setting POWER SW from ON to OFF, V1 is supplied to VDD pin and VSS is supplied to HOLD pin.
Under this connection, TAX RATE is held.
(3)
Setting POWER SW to ON, V2 is supplied to VDD pin, and also to HOLD pin.
Then calculator operates normally with TAX RATE to be held.
Note 10: V1 (battery) should be supplied to the circuit after V2 (AC) supply, because of prevention from
exhaustion of battery and abnormal operation.
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