參數(shù)資料
型號(hào): TSC21020F-20SCHXXX
廠(chǎng)商: ATMEL CORP
元件分類(lèi): 數(shù)字信號(hào)處理外設(shè)
英文描述: 40-BIT, DSP-FLOATING POINT PROCESSOR, UUC
封裝: DIE
文件頁(yè)數(shù): 15/37頁(yè)
文件大?。?/td> 483K
代理商: TSC21020F-20SCHXXX
TSC21020F
Rev. E – Oct. 05, 1998
22
External Memory Three-State Control
Parameter
20 MHz
Frequency
Dependency*
Unit
Parameter
Min
Max
Min
Max
Unit
Timing Requirement
tSTS
xTS, Setup before CLKIN High
14
50
14 +DT/4
tCK
ns
tDADTS
xTS Delay after Address, Select
28
28 + 7DT/8
ns
tDSTS
xTS Delay after XRD, XWR Low
16
16 + DT/2
ns
Switching Characteristic
tDTSD
Memory Interface Disable before
CLKIN High
0
DT/4
ns
tDTSAE
xTS High to Address, Select Enable
0
ns
NOTES
*
DT = tCK – 50 ns
xTS should only be asserted (low) during an active memory access cycle.
Memory Interface = PMA23-0, PMD47-0, PMS1-0, PMRD, PMWR, PMPAGE, DMA31-0, DMD39-0, DMS3-0, DMRD, DMWR, DMPAGE.
Address = PMA23-0, DMA31-0, Select = PMS1-0, DMS3-0.
x = PM or DM.
Figure 9. External Memory Three-State Control
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