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LC88F58B0A 데이터시트(PDF) 10 Page - ON Semiconductor |
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LC88F58B0A 데이터시트(HTML) 10 Page - ON Semiconductor |
10 / 31 page LC88F58B0A No.A1951-10/31 Port Output Types The table below lists the types of port outputs and the presence/absence of a pull-up resistor. Data can be read into any input port even if it is in the output mode. Port Name Option Selected in Units of Option Type No. Output Type Pull-up Resistor P00 to P07 P10 to P17 P20 to P27 P30 to P33 P40 to P47 P60 to P67 P70 to P72 PA0 to PA3 1 bit 1 CMOS Programmable 2 N-channel open drain PC2 - - CMOS PC0 - - N-channel open drain (32.768kHz crystal oscillator input) None PC1 - - N-channel open drain (32.768kHz crystal oscillator output) None * Make the following connection to minimize the noise input to the VDD1 pin and prolong the backup time. Be sure to electrically short the VSS1, VSS2 and VSS3 pins. Example 1: When data is being backed up in the HOLD mode, the H level signals to the output ports are fed by the backup capacitors. Example 2: When data is being backed up in the HOLD mode, the H level output at any ports is not sustained and is unpredictable. Power supply For buckup LSI VSS1VSS2VSS3 VDD3 VDD2 VDD1 + - 1k Ω 2.2 μF PC2/FILT VDD3 VDD2 VDD1 LSI VSS1VSS2VSS3 + - 1k Ω 2.2 μF PC2/FILT Power supply For buckup |
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