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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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DSP56303 数据表(PDF) 206 Page - Freescale Semiconductor, Inc |
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DSP56303 数据表(HTML) 206 Page - Freescale Semiconductor, Inc |
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206 / 292 page  DSP56303 User’s Manual, Rev. 2 9-14 Freescale Semiconductor Triple Timer Module Figure 9-13. Period Measurement Mode, TRM = 1 Figure 9-14. Period Measurement Mode, TRM = 0 Mode 5 (internal clock): TRM = 1 N = write preload M = write compare TE Clock (CLK/2 or prescale CLK) TLR TCR Counter first event M 0N N + 1 M N N + 1 N NOTE: If INV = 1, a 1-to-0 edge on TIO loads the counter, and a 0-to-1 edge on TIO TCF (Compare Interrupt if TCIE = 1) TIO pin period being measured loads TCR with count and the counter with N. Interrupt Service reads TCR; period = M - N clock periods Counter continues counting, does not stop Mode 5 (internal clock): TRM = 0 N = write preload M = write compare TE Clock (CLK/2 or prescale CLK) TLR TCR Counter first event M 0N N + 1 M M + 1 N + 1 N NOTE: If INV = 1, a 1-to-0 edge on TIO loads the counter, and a 0-to-1 edge on TIO TCF (Compare Interrupt if TCIE = 1) TIO pin period being measured loads TCR with count and the counter with N. Interrupt Service reads TCR; period = M - N clock periods Counter continues counting, does not stop. Overflow may occur (TOF=1). |
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