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HD6417618 Datasheet(PDF) 426 Page - Renesas Technology Corp |
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HD6417618 Datasheet(HTML) 426 Page - Renesas Technology Corp |
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426 / 646 page  Section 15 Host Interface (HIF) Rev. 6.00 Jun. 12, 2007 Page 394 of 610 REJ09B0131-0600 15.3 Parallel Access 15.3.1 Operation The HIF can be accessed by combining the HIFCS, HIFRS, HIFWR, and HIFRD pins. Table 15.2 shows the correspondence between combinations of these signals and HIF operations. Table 15.2 HIF Operations HIFCS HIFRS HIFWR HIFRD Operation 1 × × × No operation (NOP) 0 0 1 0 Read from register specified by HIFIDX[7:0] 0 0 0 1 Write to register specified by HIFIDX[7:0] 0 1 1 0 Read from status register (HIFGSR[7:0]) 0 1 0 1 Write to index register (HIFIDX[7:0]) 0 × 1 1 No operation (NOP) 0 × 0 0 Setting prohibited [Legend] ×: Don't care 15.3.2 Connection Method When connecting the HIF to an external device, a method like that shown in figure 15.2 should be used. External device CS A02 WR RD D15 to D00 HIF HIFCS HIFRS HIFWR HIFRD HIFD15 to HIFD00 Figure 15.2 HIF Connection Example |
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