| 전자부품 데이터시트 검색엔진 |
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M16C/62 데이터시트(PDF) 359 Page - Renesas Technology Corp |
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M16C/62 데이터시트(HTML) 359 Page - Renesas Technology Corp |
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359 / 615 page ![]() Timer B Mitsubishi microcomputers M16C / 62A Group SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER 2-42 In timer mode, choose functions from those listed in Table 2.3.1. Operations of the circled items are described below. Figure 2.3.4 shows the operation timing, and Figure 2.3.5 shows the set-up procedure. 2.3.2 Operation of Timer B (timer mode) Item Count source Set-up O Internal count source (f1 / f8 / f32 / fc32) Operation Table 2.3.1. Choosed functions (1) Setting the count start flag to “1” causes the counter to perform a down count on the count source. (2) If an underflow occurs, the content of the reload register is reloaded, and the counter contin- ues counting. At this time, the timer Bi interrupt request bit goes to “1”. (3) Setting the count start flag to “0” causes the counter to hold its value and to stop. Figure 2.3.4. Operation timing of timer mode FFFF16 n 000016 Time Count start flag Timer Bi interrupt request bit “1” “1” n = reload register content Set to “1” by software “0” “0” Set to “1” by software Cleared to “0” by software (2) Underflow (3) Stop count (1) Start count Cleared to “0” when interrupt request is accepted, or cleared by software Start count again |
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