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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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SH7705 датащи(PDF) 13 Page - Renesas Technology Corp |
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SH7705 датащи(HTML) 13 Page - Renesas Technology Corp |
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13 / 739 page  Rev. 2.00, 09/03, page xiii of xlvi Item Page Revisions (See Manual for Details) 7.13 Others Reset 237 In standby, sleep, and manual reset, control registers of the bus state controller are not initialized. At manual reset, the current bus cycle being executed is completed and then the access wait state is entered. Since the RTCNT continues counting up during manual reset signal assertion, a refresh request occurs to initiate the refresh cycle. Note that arbitration requests using BREQ are not accepted during manual reset signal assertion. 8.3.4 DMA Channel Control Registers (CHCR) 244 Bits 15, 14 description amended 00: Fixed destination address (setting prohibited in 16-byte transfer) 245 Bits 13, 12 description amended 00: Fixed source address (setting prohibited in 16-byte transfer) 8.4.3 Channel Priority Round-Robin Mode 258 ⋅⋅⋅⋅⋅ The priority of round-robin mode is CH0 > CH1 > CH2 > CH3 immediately after a reset. When the round-robin mode is specified, cycle-steal mode and burst mode should not be mixed among the bus modes for multiple channels. 8.4.4 DMA Transfer Types Address Modes Figure 8.6 Example of DMA Transfer Timing in Dual Mode (Source: Ordinary Memory, Destination: Ordinary Memory) 262 Figure amended CKIO A25 to A0 D31 to D0 WEn RD DACKn (Active-Low) CSn Transfer source address Transfer destination address Data read cycle Data write cycle (1st cycle) (2nd cycle) Bus Mode and channel Priority Order 266 Description largely revised 8.5 Precautions 270 Newly added |
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