參數(shù)資料
型號: ISP1181B
廠商: NXP Semiconductors N.V.
英文描述: Full-speed Universal Serial Bus peripheral controller
中文描述: 全速通用串行總線外設控制器
文件頁數(shù): 54/70頁
文件大?。?/td> 341K
代理商: ISP1181B
Philips Semiconductors
ISP1181B
Full-speed USB peripheral controller
Product data
Rev. 02 — 07 December 2004
54 of 70
9397 750 13958
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
21.3 DMA timing: single-cycle mode
(1) Example: read data.
Fig 22. Write data + write command cycle timing.
MGT025
Tcy(WD-WC)
data
DATA
WR
data
command
RD
CS
(1)
Fig 23. Write command + read data cycle timing.
MGT023
Tcy(WC-RD)
Tcy(RD-RD)
command
DATA
WR
data
data
RD
CS
(1) Example: read data.
Fig 24. Read data + write command cycle timing.
MGT024
Tcy(RD-WC)
data
DATA
WR
data
(1)
command
RD
CS
Table 59:
Symbol
Dynamic characteristics: single-cycle DMA timing
Parameter
Conditions
8-bit bus
Min
16-bit bus
Min
Unit
Max
Max
8237 compatible mode (see
Figure 25
)
t
ASRP
DREQ off after DACK on
T
cy(DREQ)
cycle time signal DREQ
-
90
40
-
-
180
40
-
ns
ns
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