t
參數(shù)資料
型號(hào): ADSP-2171BSZ-133
廠商: Analog Devices Inc
文件頁(yè)數(shù): 14/52頁(yè)
文件大?。?/td> 0K
描述: IC DSP CONTROLLER 16BIT 128PQFP
標(biāo)準(zhǔn)包裝: 1
系列: ADSP-21xx
類(lèi)型: 定點(diǎn)
接口: 主機(jī)接口,串行端口
時(shí)鐘速率: 33MHz
非易失內(nèi)存: 外部
芯片上RAM: 10kB
電壓 - 輸入/輸出: 5.00V
電壓 - 核心: 5.00V
工作溫度: -40°C ~ 85°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 128-BFQFP
供應(yīng)商設(shè)備封裝: 128-MQFP(14x20)
包裝: 托盤(pán)
ADSP-2171/ADSP-2172/ADSP-2173
REV. A
–21–
ADSP-2171/ADSP-2172
Parameter
Min
Max
Unit
Bus Request/Grant
Timing Requirement:
tBH
BR
Hold after CLKOUT High
1
0.25tCK + 2
ns
tBS
BR
Setup before CLKOUT Low
1
0.25tCK + 17
ns
Switching Characteristic:
tSD
CLKOUT High to DMS, PMS, BMS,
0.25tCK + 16
ns
RD
, WR Disable
tSDB
DMS
, PMS, BMS, RD, WR
Disable to BG Low
0
ns
tSE
BG
High to DMS, PMS, BMS,
RD
, WR Enable
0
ns
tSEC
DMS
, PMS, BMS, RD, WR
Enable to CLKOUT High
0.25tCK – 7
ns
tSDBH
DMS
, PMS, BMS, RD, WR
Disable to BGH Low
2
0ns
tSEH
BGH
High to DMS, PMS, BMS,
RD
, WR Enable
2
0ns
NOTES
1BR 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.
2BGH is asserted when the bus is granted and the processor requires control of the bus to continue.
t
BS
BR
t
BH
CLKOUT
PMS, DMS
BMS, RD
WR
BG
CLKOUT
t
SD
t
SDB
t
SE
t
SEC
tSDBH
BGH
tSEH
Figure 10. Bus Request–Bus Grant
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