參數(shù)資料
型號: ADSP-21mod970
廠商: Analog Devices, Inc.
英文描述: Multi-Port Internet Gateway Processor(多口網(wǎng)關(guān)處理器)
中文描述: 多端口Internet網(wǎng)關(guān)處理器(多口網(wǎng)關(guān)處理器)
文件頁數(shù): 36/50頁
文件大?。?/td> 980K
代理商: ADSP-21MOD970
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ADSP-21mod970 Preliminary Data Sheet
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Data
BG
Technca
TIMING PARAMETERS ADSP-21mod970
Bus Request-Bus Grant
NOTES
xMS = PMS, DMS, CMS, IOMS, BMS
1
BR is an asynchronous signal. If BR meets the setup/hold requirements, it will be recognized during the current clock cycle; otherwise the signal will be recognized
on the following cycle. Refer to the
ADSP-2100 Family User’s Manual
for BR/BG cycle relationships.
2
BGH is asserted when the bus is granted and the processor requires control of the bus to continue.
Figure 20 Bus Request–Bus Grant
Parameter
Bus Request/Grant
Timing Requirements:
t
BH
t
BS
Min
Max
Unit
BR Hold after CLKOUT High
1
BR Setup before CLKOUT Low
1
Switching Characteristics:
t
SD
t
SDB
t
SE
t
SEC
t
SDBH
t
SEH
CLKOUT High to xMS, RD, WR Disable
xMS, RD, WR Disable to BG Low
BG High to xMS, RD, WR Enable
xMS, RD, WR Enable to CLKOUT High
xMS, RD, WR Disable to BGH Low
2
BGH High to xMS, RD, WR Enable
2
0.25t
CK
+ 2
0.25t
CK
+ 17
0.25t
CK
+ 10
0
0
0.25t
CK
– 7
0
0
ns
ns
ns
ns
ns
ns
ns
ns
CLKOUT
t
SD
t
SDB
t
SE
t
SEC
t
SDBH
t
SEH
t
BS
BR
t
BH
CLKOUT
BGH
PMS, DMS
BMS, RD
WR
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