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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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UPD17145CT 데이터시트(PDF) 49 Page - NEC |
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UPD17145CT 데이터시트(HTML) 49 Page - NEC |
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49 / 102 page  49 µPD17145(A1), 17147(A1), 17149(A1) (2) Timing in single mode (compare operation) Figure 14-4. Timing in Single Mode (Compare Operation) After 1 has been written to ADCSTRT in the single mode (execution of the POKE instruction), a value is stored to ADCCMP three instructions after, and the result of comparison can be read by the PEEK instruction. Even if data is set to ADCR (execution of the PUT instruction), comparison is started in the same manner as ADCSTRT, and the result of comparison can be read three instructions after. The ADCCMP flag is cleared to 0 when reset is executed or when an instruction that writes data to ADCR is executed. Caution Be sure to set ADCSOFT to 1 before setting a value to ADCR. When ADCSOFT = 0, no value can be set to ADCR (the PUT ADCR, DBF instruction is invalidated). Remark Sampling time = 14/fx (1.75 µs, at 8 MHz) Sampling capacitor capacitance = 100 pF (MAX.) Sampling Sampling POKE PEEK PUT PEEK 12 1 2 ADCSTRT ADCEND ADCCMP ADCSTRT executed → Number of executed instructions (instruction cycle) Previous data Comparison result Comparison result ADCCMP read ADCCMP read |
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