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SH7616 Datasheet(PDF) 292 Page - Renesas Technology Corp |
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SH7616 Datasheet(HTML) 292 Page - Renesas Technology Corp |
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292 / 935 page ![]() Section 7 Bus State Controller (BSC) Rev. 2.00 Mar 09, 2006 page 266 of 906 REJ09B0292-0200 A4WM A3WM A2WM A1WM A0WM W41 W31 W21 W11 W01 W40 W30 W20 W10 W00 Description 0 0 0 External wait input ignored 1 External wait input enabled 1 0 External wait input enabled 1 External wait input enabled (Initial value) 1 Don’t care Don’t care External wait input ignored Bits 7 to 4—Reserved bits: These bits are always read as 0. The write value should always be 0. Bits 3 and 2—Idles between Cycles for Area 4 (IW41, IW40): These bits specify idle cycles inserted between cycles in CS4 in the same way as for CS 0 to 3. The set values below show the minimum number of idle cycles; more cycles than indicated by the Idles between Cycles setting may actually be inserted. Bit 3: IW41 Bit 2: IW40 Description 0 0 No idle cycle 1 One idle cycle inserted 1 0 Two idle cycles inserted (Initial value) 1 Four idle cycles inserted Bits 1 and 0—Wait Control for Area 4 (W41, W40): These bits specify waits for CS4 in the same way as for areas 0 to 3. Bit 1: W41 Bit 0: W40 Description 0 0 No wait. External wait input disabled without wait 1 One wait. External wait input enabled with one wait 1 0 Two waits. External wait input enabled with two waits 1 Complies with the long wait specification of bus control registers 1 and 3 (BCR1, BCR3). External wait input is enabled (Initial value) |
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