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TMPR4937 Datasheet(PDF) 118 Page - Toshiba Semiconductor

Part # TMPR4937
Description  64-Bit TX System RISC TX49 Family
PDF  552 Pages
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Manufacturer  TOSHIBA [Toshiba Semiconductor]
Direct Link  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TMPR4937 Datasheet(HTML) 118 Page - Toshiba Semiconductor

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Chapter 7 External Bus Controller
7-18
7.3.7.5
Ready Input Timing
The ACK*/Ready pin is used as a Ready input when in the Ready mode. The Ready input
timing is the same as the ACK* input timing explained in 7.3.7.4 ACK* Input Timing (External
ACK Mode) with the two following exceptions.
•
Ready must be a High Active signal.
•
When in the Ready mode, the Wait cycle count specified by EBCCRn.PWT:WT must be
inserted in order to delay the Ready signal check (see 7.3.6.3 Ready Mode).
Figure 7.3.13 Ready Input Timing (Read Cycle)
SYSCLK
CE*
ADDR [19:0]
OE*
DATA [31:0]
ACK*/READY (Input)
Latch Data
Acknowledge Ready
2 clocks
EBCCRn.PWT:WT=2
EBCCRn.SHWT=0
ACK*/READY
(Input)
2 clocks
SYSCLK
CE*
ADDR [19:0]
OE*
DATA [31:0]
Latch Data
Acknowledge Ready
EBCCRn.PWT:WT=2
EBCCRn.SHWT=0
Start Ready
Check



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