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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SH7041A датащи(PDF) 301 Page - Renesas Technology Corp |
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SH7041A датащи(HTML) 301 Page - Renesas Technology Corp |
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301 / 923 page  263 11.3.11 Source Address Reload Function Channel 2 has a source address reload function. This returns to the first value set in the source address register (SAR2) every four transfers by setting the RO bit of CHCR2 to 1. Figure 11.25 illustrates this operation. Figure 11.26 is a timing chart for reload ON mode, with burst mode, autorequest, 16-bit transfer data size, SAR2 increment, and DAR2 fixed mode. SAR2 (initial value) DMAC Transfer request DMAC control block Reload control 4th count CHCR2 DMATCR2 SAR2 RO bit = 1 Count signal Reload signal Reload signal Figure 11.25 Source Address Reload Function CK Internal address bus Internal data bus SAR2 DAR2 DAR2 DAR2 DAR2 SAR2+2 SAR2+4 SAR2+6 SAR2 DAR2 SAR2 data SAR2+2 data SAR2+4 data SAR2+6 data SAR2 data 1st channel 2 transfer 2nd channel 2 transfer 3rd channel 2 transfer 4th channel 2 transfer 5th channel 2 transfer SAR2 output DAR2 output SAR2+2 output DAR2 output SAR2+4 output DAR2 output SAR2+6 output DAR2 output SAR2 output DAR2 output After SAR2+6 output, SAR2 is reloaded Bus right is returned one time in four Figure 11.26 Source Address Reload Function Timing Chart |
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