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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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H8SX/1663M 데이터시트(PDF) 881 Page - Renesas Technology Corp |
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H8SX/1663M 데이터시트(HTML) 881 Page - Renesas Technology Corp |
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881 / 1504 page  Section 17 32K Timer (TM32K) Rev. 2.00 Sep. 24, 2008 Page 849 of 1468 REJ09B0412-0200 17.3 Operation 17.3.1 Basic Operation Either 8-bit or 24-bit counter operation can be selected for the timer counter. Setting 1 to the TME bit in TCR32K starts the count-up operation. A 32K timer interrupt (32KOVI) is generated by the interrupt cycle. Table 17.1 shows relationships between the timer counter operations according to the setting of bits EXCKSN, CKS1, and CKS0 in TCR32K and the interrupt cycles. Table 17.1 Relationships between Counter Operations and 32KOVI Cycles Setting Division Ratio Selected Counter Interrupt Cycles EXCKSN CKS1 CKS2 Internally Divided CLK TCNT 32K1 TCNT 32K2 TCNT 32K3 Counter value when interrupt generates 32KOVI Cycle 1 0 0 SUBCK/32 √ − − 250 ms 1 0 1 SUBCK/64 √ − − 500 ms 1 1 0 SUBCK/128 √ − − 1 s 1 1 1 SUBCK/256 √ − − TCNT32K1=H'FF 2 s 0 0 0 SUBCK/16384 √ √ √ 30 s 0 0 1 SUBCK/32768 √ √ √ TCNT32K3=H'3B 60 s 0 1 0 SUBCK/16384 √ √ √ Approx. 22.7 days 0 1 1 SUBCK/32768 √ √ √ TCNT32K1 to 3 =H'FFF3B Approx. 45.5 days √ : in use − : not in use |
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