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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) 262 Page - Renesas Technology Corp |
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SH7041A датащи(HTML) 262 Page - Renesas Technology Corp |
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262 / 923 page  224 • Bits 11–8—Resource Select 3–0 (RS3–RS0): These bits specify the transfer request source. Bit 11: RS3 Bit 10: RS2 Bit 9: RS1 Bit 8: RS0 Description 0 0 0 0 External request, dual address mode (initial value) 0 0 0 1 Prohibited 0 0 1 0 External request, single address mode. External address space → external device. 0 0 1 1 External request, single address mode. External device → external address space. 0 1 0 0 Auto-request 0 1 0 1 Prohibited 0 1 1 0 MTU TGI0A 0 1 1 1 MTU TGI1A 1 0 0 0 MTU TGI2A 1 0 0 1 MTU TGI3A 1 0 1 0 MTU TGI4A 1 0 1 1 A/D ADI* 1 1 0 0 SCI0 TXI0 1 1 0 1 SCI0 RXI0 1 1 1 0 SCI1 TXI1 1 1 1 1 SCI1 RXI1 Notes: External request designations are valid only for channels 0 and 1. No transfer request sources can be set for channels 2 or 3. * ADI1 for A mask. • Bit 7—Reserved bits: Data is 0 when read. The write value always be 0. • Bit 6—DREQ Select (DS): Sets the sampling method for the DREQ pin in external request mode to either low-level detection or falling-edge detection. This bit is valid only with CHCR0 and CHCR1. For CHCR2 and CHCR3, this bit always reads as 0 and cannot be modified. Even with channels 0 and 1, when specifying an on-chip peripheral module or auto-request as the transfer request source, this bit setting is ignored. The sampling method is fixed at falling- edge detection in cases other than auto-request. Bit 6: DS Description 0 Low-level detection (initial value) 1 Falling-edge detection |
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