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HD6432351 데이터시트(PDF) 478 Page - Renesas Technology Corp |
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HD6432351 데이터시트(HTML) 478 Page - Renesas Technology Corp |
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478 / 1025 page ![]() Section 10 16-Bit Timer Pulse Unit (TPU) Rev. 3.00 Sep 15, 2006 page 444 of 988 REJ09B0330-0300 Bit 7—Count Direction Flag (TCFD): Status flag that shows the direction in which TCNT counts in channels 1, 2, 4, and 5. In channels 0 and 3, bit 7 is reserved. It is always read as 1 and cannot be modified. Bit 7 TCFD Description 0 TCNT counts down 1 TCNT counts up (Initial value) Bit 6—Reserved: Read-only bit, always read as 1. Bit 5—Underflow Flag (TCFU): Status flag that indicates that TCNT underflow has occurred when channels 1, 2, 4, and 5 are set to phase counting mode. In channels 0 and 3, bit 5 is reserved. It is always read as 0 and cannot be modified. Bit 5 TCFU Description 0 [Clearing condition] (Initial value) When 0 is written to TCFU after reading TCFU = 1 1 [Setting condition] When the TCNT value underflows (changes from H'0000 to H'FFFF) Bit 4—Overflow Flag (TCFV): Status flag that indicates that TCNT overflow has occurred. Bit 4 TCFV Description 0 [Clearing condition] (Initial value) When 0 is written to TCFV after reading TCFV = 1 1 [Setting condition] When the TCNT value overflows (changes from H'FFFF to H'0000 ) |
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