參數資料
型號: ML60852
廠商: OKI SEMICONDUCTOR CO., LTD.
英文描述: USB Device Controller
中文描述: USB設備控制器
文件頁數: 73/81頁
文件大?。?/td> 451K
代理商: ML60852
PEDL60852-01
1
Semiconductor
ML60852
73/81
DMA Transfer Timing (2)
ML60852 to Memory (Single Transfer, Dual Address Mode)
Parameter
Symbol
t
1
t
2
t
3
t
4
Condition
Load 20 pF
Min.
0
63
Max.
20
63
46
Unit
ns
ns
ns
ns
ns
Note
DREQ
Disable Time
DREQ
Enable Time
Read Data Delay Time
Data Hold Time
(4)
(1)
Load 20 pF
8-bit DMA
(2)
Recovery Time
t
5
16-bit DMA
105
ns
(3)
Notes: (1) When in Dual Address mode, the DACK is ignored.
t
1
and t
3
are defined depending on
CS
or
RD
which becomes active last.
A7: A0 specifies the FIFO address.
Refer to READ Timing (1) for Address Setup Time and Address Hold Time.
(2) 3-clock time of oscillation clock (clock period: 21 ns).
(3) 5-clock time of oscillation clock (clock period: 21 ns).
(4) It is possible to increase
t
t
2
by setting the DMA interval register (DMAINTVL).
DATA OUT
A7: A0
DREQ
DOUT
RD
CS
t
4
t
3
t
5
t
2
t
1
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