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UPD17P136ACT Datasheet(PDF) 159 Page - NEC |
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UPD17P136ACT Datasheet(HTML) 159 Page - NEC |
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159 / 292 page  CHAPTER 13 PERIPHERAL HARDWARE 140 (c) Single mode operation (comparison) timing Figure 13-21. Single Mode Operation (Comparison) Timing In the single mode, comparison is started when compare data is set to ADCR (by executing the PUT instruction), and the result of conversion can be read by using the PEEK instruction after execution of the third instruction. The ADCCMP flag is cleared to 0 when an instruction that writes ADCR is executed. Caution Before setting a value to ADCR, be sure to set ADCSOFT to 1. A value cannot be set to ADCR while ADCSOFT is 0 (the “PUT ADCR, DBF” instruction is invalidated). One sampling time = 14/fX (1.75 µs, fX = 8 MHz) PUT 1 2 PEEK PUT 1 Set comparison data in ADCR. Previous data Number of instruction executed (instruction cycle) ADCCMP ADCEND 2 PEEK Set comparison data in ADCR. Comparison result Comparison result Undefined Sampling Sampling Read ADCCMP. Read ADCCMP. |
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