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PD16431A Datasheet(PDF) 10 Page - Renesas Technology Corp |
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PD16431A Datasheet(HTML) 10 Page - Renesas Technology Corp |
10 / 38 page Data Sheet S15129EJ3V0DS 8 µµµµPD16431A If diode A is not available, not only the key data may not be read correctly, but the LCD display may be affected or IC may be damaged or deteriorated. For example, if SW1 and SW2 are ON and KS1 has been selected (high level) as shown below, this will cause not only current I1 which is supposed to run but also short-circuited current I2 of KS1 and KS2 to run. It is possible that this will then cause the following three problems: (1) Since the level to KEY2 is not correctly sent, the key data cannot be latched correctly. (2) If KS2 is used as SEG2 as well, the LCD display may be distorted (such as causing unintended segments to light up). (3) Since the short-circuited current (current I2) of KS2 (high level) to KS2 (low level) runs, IC may be damaged or deteriorated. KEY1 KS1 KS2 KS3 KS4 KS5 KS6 KS7 KS8 KEY2 KEY3 KEY4 = I2 I1 SW1 SW2 Select Non Select (low level) (high level) |
Número de pieza similar - PD16431A_15 |
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Descripción similar - PD16431A_15 |
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