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M32C/86 датащи(PDF) 90 Page - Renesas Technology Corp |
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M32C/86 датащи(HTML) 90 Page - Renesas Technology Corp |
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90 / 505 page ![]() Page 67 9 7 4 f o 5 0 0 2 , 8 0 . p e S 0 0 . 1 . v e R 0 0 1 0 - 4 0 2 0 B 9 0 J E R 8. Bus ) T 6 8 / C 2 3 M , 6 8 / C 2 3 M ( p u o r G 6 8 / C 2 3 M 8.2.4.1 Bus Cycle with Recovery Cycle Added The EWCRi06 bit in the EWCRi register (i=0 to 3) determines whether the recovery cycle is added or not. In the recovery cycle, addresses and wrie data outputs are provided continuously (using the separate bus only). Devices, which take longer address hold time and data hold time to write data, are connectable. Figure 8.9 Recovery Cycle LA LA WD RD A RD WD A : Address LA : Latch Address RD : Read Data WD : Write Data • Recovery Cycle with Separate Bus (For 1 φ + 2φ) BCLK Address CSi (1) Data (Read) RD Data (Write) WR, WRL, WRH Recovery Cycle <--- Hold an Address <--- Hold Data • Recovery Cycle with Multiplexed Bus (For 2 φ + 3φ) Recovery Cycle <--- Hold Data i=0 to 3 NOTES: 1. When the microcomputer continuously accesses the same CS area, the CSi pin provides an "L" signal continuously. BCLK CSi (1) Data (Read) RD Data (Write) WR (WRL) ALE |
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