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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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M16C/26 датащи(PDF) 176 Page - Renesas Technology Corp |
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M16C/26 датащи(HTML) 176 Page - Renesas Technology Corp |
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176 / 239 page  Renesas Technology Corp. Programmable I/O Ports 170 M16C/26 Group SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER Under development Preliminary Specifications Rev. 0.9 Specifications in this manual are tentative and subject to change. Figure 1.17.9. Example connection of unused pins Figure 1.17.8. Port control register Table 1.17.1. Example connection of unused pins in single-chip mode Pin name Connection Ports P15-P17, P6, P7, P80-P83, P86-P87, P90-P3, P10 After setting to input mode, connect every pin to Vss via a resistor (pull-down); or after setting to output mode, leave these pins open. Note 1: With external clock input to XIN pin. XOUT (Note 1) AVSS, VREF AVcc Open Connect to Vcc Connect to Vss VDC Connect via a 0.1uF capacitor to Vss After setting to input mode, connect to Vcc via a resistor (pull-up). P85(NMI/SD) Port P15-P17, P6, P7, P80-P83, P85-P87, P90-P93, P10 (Input mode) (Output mode) NMI (Note) XOUT AVCC AVSS VREF Microcomputer VCC VSS Open Open VDC Note: When P85 is to be used as NMI, a pullup resistor should be connected. Port control register Symbpl Address When reset PCR 03FF16 000000002 Bit name Function Bit symbol W R b7 b6 b5 b4 b3 b2 b1 b0 PCR0 Port P1 control register 0 : When input port, read port input level. When output port, read the contents of port P1 register. 1 : Read the contents of port P1 register when input and output port. Nothing is assigned. In an attempt to write to these bits, write 0. The value, if read, turns out to be 0. |
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