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TMP88CH41NG Datasheet(PDF) 97 Page - Toshiba Semiconductor |
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TMP88CH41NG Datasheet(HTML) 97 Page - Toshiba Semiconductor |
97 / 186 page Page 87 TMP88CH41NG 10.3 Function TimerCounter 3 has three types of operating modes: timer, event counter and capture modes. 10.3.1 Timer mode In the timer mode, the up-counter counts up using the internal clock. When a match between the up-counter and the timer register 3A (TC3DRA) value is detected, an INTTC3 interrupt is generated and the up-counter is cleared. After being cleared, the up-counter restarts counting. Setting TC3CR<ACAP> to 1 captures the up- counter value into the timer register 3B (TC3DRB) with the auto-capture function. The count value during timer operation can be checked by executing the read instruction to TC3DRB. Note:00H which is stored in the up-counter immediately after detection of a match is not captured into TC3DRB. (Figure 10-2) Figure 10-2 Auto-Capture Function Table 10-1 Source Clock for TimerCounter 3 (Example: fc = 20 MHz) TC3CK NORMAL, IDLE mode DV1CK = 0DV1CK = 1 Resolution [ µs] Maximum Time Setting [ms] Resolution [ µs] Maximum Time Setting [ms] 000 409.6 104.45 819.2 208.90 001 204.8 52.22 409.6 104.45 010 102.4 26.11 204.8 52.22 011 51.2 13.06 102.4 26.11 100 25.6 6.53 51.2 13.06 101 12.8 3.06 25.6 6.53 110 6.4 1.63 12.8 3.06 TC3DRB Note: In the case that TC3DRB is C8H Clock Up-counter Match detect C7 C8 TC3DRA C8 00 01 C7 C8 C6 C6 01 |
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