參數(shù)資料
型號(hào): SL811S
廠商: CYPRESS SEMICONDUCTOR CORP
元件分類(lèi): 總線控制器
英文描述: USB Dual Speed Slave Controller
中文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQCC28
封裝: PLASTIC, LCC-28
文件頁(yè)數(shù): 25/27頁(yè)
文件大?。?/td> 181K
代理商: SL811S
SL811S/T
Document #: 38-08009 Rev. **
Page 25 of 27
7.5.4
SL811S DMA Read Cycle
Note:
12. Data is held until nDACK goes high regardless of state of nREAD.
Parameter
Description
Min.
Typ.
Max.
tdack
nDACK low
100 ns
tddrdlo
nDACK to nRD low delay
0 ns
tdckdr
nDACK low to nDRQ high delay
5 ns
tdrdp
tdhld
[12]
nRD pulse width
90 ns
Date hold after nDACK high
5 ns
tddaccs
Data access from nDACK low
85 ns
tdrdack
nRD high to nDACK high
0 ns
tdakrq
nDRQ low after nDACK high
5 ns
trdcycle
DMA Read Cycle Time
150 ns
nDRQ
nDACK
D0-D7
DATA
nRD
SL811 DMA READ CYCLE TIMING
tdrdp
tdaccs
tdack
tdhld
tddrdlo
tdckdr
tdakrq
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