參數(shù)資料
型號: TMX320VC5421
廠商: Texas Instruments, Inc.
元件分類: 數(shù)字信號處理
英文描述: DIGITAL SIGNAL PROCESSOR
中文描述: 數(shù)字信號處理器
文件頁數(shù): 63/88頁
文件大?。?/td> 1156K
代理商: TMX320VC5421
TMS320VC5421
DIGITAL SIGNAL PROCESSOR
SPRS098 – DECEMBER 1999
63
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
externally generated wait states timing
timing requirements for externally generated wait states [H = 0.5 t
c(CO)
]
(see Figure 30 and
Figure 31)
MIN
MAX
UNIT
tsu(RDY)
th(RDY)
tv(RDY)IOSTRB
th(RDY)IOSTRB
The hardware wait states can be used only in conjunction with the software wait states to extend the bus cycles. To generate wait states using
READY, at least two software wait states must be programmed.
These timings are included for reference only. The critical timings for READY are those referenced to CLKOUT.
Setup time, READY before CLKOUT low
5
ns
Hold time, READY after CLKOUT low
Valid time, READY after IOSTRB low
Hold time, READY after IOSTRB low
0
ns
5H–8
ns
5H
ns
tsu(RDY)
IOSTRB
READY
PPA[18:0]
CLKOUT
th(RDY)
Wait State Generated
by READY
Wait
States
Generated
Internally
tv(RDY)IOSTRB
th(RDY)IOSTRB
Figure 30. I/O Port Read With Externally Generated Wait States
A
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