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TMPR4938 bảng dữ liệu(PDF) 125 Page - Toshiba Semiconductor

tên linh kiện TMPR4938
Giải thích chi tiết về linh kiện  64-Bit TX System RISC TX49 Family
PDF  716 Pages
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nhà sản xuất  TOSHIBA [Toshiba Semiconductor]
Trang chủ  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TMPR4938 bảng dữ liệu(HTML) 125 Page - Toshiba Semiconductor

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Chapter 7 External Bus Controller
7-15
7.3.7.3
ACK* Output Timing (Normal Mode, Page Mode)
When in the Normal mode and Page mode of the ACK*/Ready Dynamic mode, the ACK*
signal becomes an output signal and is asserted for one clock cycle to send notification to the
external device of the data Read and data Write timing.
During the Read cycle, the data is latched at the rise of the next clock cycle after when the
ACK* signal is asserted. (See Figure 7.3.7 ACK* Output Timing (Single Read Cycle)).
During the Write cycle, SWE*/BWE* is deasserted at the next clock cycle after when the ACK*
signal is deasserted, and the data is held for one more clock cycle after that. (See Figure 7.3.8
ACK* Output Timing (Single Write Cycle)).
Figure 7.3.7 ACK* Output Timing (Single Read Cycle)
Figure 7.3.8 ACK* Output Timing (Single Write Cycle)
1 clock
SYSCLK
CE*
ADDR [19:0]
OE*
DATA [31:0]
ACK*/READY
(Output)
Data is latched
EBCCRn.PWT:WT=2
EBCCRn.SHWT=0
SYSCLK
CE*
ADDR [19:0]
SWE*/BWE*
DATA [31:0]
ACK*/READY
(Output)
2 clocks
EBCCRn.PWT:WT=2
EBCCRn.SHWT=0



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