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): 59/88頁
文件大?。?/td> 1156K
代理商: TMX320VC5421
TMS320VC5421
DIGITAL SIGNAL PROCESSOR
SPRS098 – DECEMBER 1999
59
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
ready timing for externally generated wait states
timing requirements for externally generated wait states [H = 0.5 t
c(CO)
]
(see Figure 26 and
Figure 27)
MIN
MAX
UNIT
tsu(RDY)
th(RDY)
tv(RDY)MSTRB
th(RDY)MSTRB
The hardware wait states can be used only in conjunction with the software wait states to extend the bus cycles. To generate wait states by
READY, at least two software wait states must be programmed. READY is not sampled until the completion of the internal software wait states.
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 MSTRB low
Hold time, READY after MSTRB low
0
ns
4H–8
ns
4H
ns
MSTRB
READY
PPA[18:0]
CLKOUT
th(RDY)
th(RDY)MSTRB
tv(RDY)MSTRB
Wait State
Generated
by READY
Wait States
Generated Internally
tsu(RDY)
Figure 26. Memory Read With Externally Generated Wait States
A
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