参数资料
型号: TC83230-0012
元件分类: 消费家电
英文描述: SPECIALTY CONSUMER CIRCUIT, PQFP80
封装: 14 X 20 MM, 0.80 MM PITCH, PLASTIC, QFP-80
文件页数: 18/27页
文件大小: 423K
代理商: TC83230-0012
TC83230-0012
2003-03-04
25
The Proposal of Outer Circuit for Tax Rate Holding with Back-Up Battery.
Note 11: V1 = +3 V: Battery supply
V2 = +5 V: DC 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 12: V1 (battery) should be supplied to the circuit after V2 (DC) supply, because of prevention from
exhaustion of battery and abnormal operation.
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