參數(shù)資料
型號(hào): ML60852
廠商: OKI SEMICONDUCTOR CO., LTD.
英文描述: USB Device Controller
中文描述: USB設(shè)備控制器
文件頁數(shù): 78/81頁
文件大?。?/td> 451K
代理商: ML60852
PEDL60852-01
1
Semiconductor
ML60852
78/81
DMA Transfer Timing (7)
Memory to ML60852 (Demand Transfer, Single Address Mode)
Parameter
Symbol
t
1
t
2
t
3
t
4
t
5
Condition
Load 20 pF
FIFO WRITE
Min.
42
0
30
5
63
Max.
20
Unit
ns
ns
ns
ns
ns
ns
Note
DREQ
Disable Time
FIFO Access Time
DACK Hold Time
Write Data Setup Time
Write Data Hold Time
(1)
8-bit DMA
(2)
Recovery Time
t
6
16-bit DMA
105
ns
(3)
Notes: (1) When in Single Address mode,A7: A0 and
CS
are ignored.
t
is defined depending on DACK or
WR
which becomes active last.
(2) 3-clock time of oscillation clock (clock period: 21 ns).
(3) 5-clock time of oscillation clock (clock period: 21 ns).
DREQ
DIN
WR
DACK
Last Packet Write
(Note)
t
4
t
3
t
5
t
6
t
2
t
1
(Note) The last Write to reach the byte size (maximum packet size) specified by the EP1 Payload
Register.
To terminate DMA transfer before reaching the maximum packet size, set EP1 Packet Ready by
writing "1"to the EP1 Endpoint Packet Ready bit.
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