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LC87F1A32AUWA-2H Datasheet(PDF) 10 Page - ON Semiconductor |
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LC87F1A32AUWA-2H Datasheet(HTML) 10 Page - ON Semiconductor |
10 / 26 page LC87F1A32A No.A0704-10/26 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 Output Type Pull-up Resistor P00 to P07 1 bit 1 CMOS Programmable (Note 1) 2 Nch-open drain No P10 to P17 P20 to P27 P30 to P34 1 bit 1 CMOS Programmable 2 Nch-open drain Programmable P70 - No Nch-open drain Programmable P71 to P73 - No CMOS Programmable PWM0, PWM1 - No CMOS No D+, D- - No CMOS No XT1 - No Input only No XT2 - No 32.768kHz crystal oscillator output (Nch-open drain when in general-purpose output mode) No Note 1: Programmable pull-up resistors for port 0 are controlled in 4 bit units (P00 to 03, P04 to 07). Power Pin Treatment Connect the IC as shown below to minimize the noise input to the VDD1 pin. Be sure to electrically short the VSS1, VSS2, and VSS3 pins. Example 1: When the microcontroller is in the backup state in the HOLD mode, the power to sustain the high level of output ports is supplied by their backup capacitors. Example 2: The high level output at ports is not sustained and unstable in the HOLD backup mode. VSS1 VSS2 VSS3 VDD1 VDD2 VDD3 Power supply For backup LSI LSI VSS1 VSS2VSS3 VDD1 VDD2 VDD3 Power supply For backup |
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