參數(shù)資料
型號: ISP1760
廠商: NXP Semiconductors N.V.
英文描述: Hi-Speed Universal Serial Bus host controller for embedded applications
中文描述: 高速嵌入式應(yīng)用的通用串行總線主控制器
文件頁數(shù): 93/105頁
文件大?。?/td> 449K
代理商: ISP1760
9397 750 13257
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data sheet
Rev. 01 — 8 November 2004
93 of 105
Philips Semiconductors
ISP1760
Embedded Hi-Speed USB host controller
14.2.3
Multicycle: DMA read
DREQ and DACK are active HIGH.
Fig 17. DMA read (multicycle burst).
Table 99:
V
CC(I/O)
= 1.65 V to 1.95 V; T
amb
=
40
°
C to +85
°
C; unless otherwise specified.
Symbol Parameter
t
a16
DACK assertion after DREQ assertion time
t
a26
RD_N assertion after DACK assertion time
t
d16
data valid time after RD_N assertion
t
w16
RD_N pulse width
T
cy16
read-to-read cycle time
t
a36
DREQ deassertion time after last burst RD_N
deassertion
t
a46
DACK deassertion to next DREQ assertion time -
DMA read (multicycle burst)
Min
0
0
-
t
d16
40
20
Max
-
-
31
-
-
-
Unit
ns
ns
ns
ns
ns
ns
82
ns
Table 100: DMA read (multicycle burst)
V
CC(I/O)
= 3.3 V to 3.6 V; T
amb
=
40
°
C to +85
°
C; unless otherwise specified.
Symbol Parameter
t
a16
DACK assertion after DREQ assertion time
t
a26
RD_N assertion after DACK assertion time
t
d16
data valid time after RD_N assertion
t
w16
RD_N pulse width
T
cy16
read-to-read cycle time
t
a36
DREQ deassertion time after last burst RD_N
deassertion
t
a46
DACK deassertion to next DREQ assertion time -
Min
0
0
-
t
d16
36
11
Max
-
-
16
-
-
-
Unit
ns
ns
ns
ns
ns
ns
82
ns
DREQ
t
a36
DACK
RD_N
004aaa531
data 0
DATA
data n-1
data 1
data n
t
a16
t
a26
t
d16
t
w16
T
cy16
t
a46
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