参数资料
型号: ML60852A
厂商: LAPIS SEMICONDUCTOR CO LTD
元件分类: 总线控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP44
封装: PLASTIC, QFP-44
文件页数: 77/82页
文件大小: 370K
代理商: ML60852A
FEDL60852A-03
1Semiconductor
ML60852A
78/81
DMA Transfer Timing (7)
Memory to ML60852A (Demand Transfer, Single Address Mode)
Parameter
Symbol
Condition
Min.
Max.
Unit
Note
DREQ Disable Time
t
1
Load 20 pF
20
ns
FIFO Access Time
t
2
FIFO WRITE
42
ns
(1)
DACK Hold Time
t
3
0—
ns
Write Data Setup Time
t
4
30
ns
Write Data Hold Time
t
5
5—
ns
8-bit DMA
63
ns
(2)
Recovery Time
t
6
16-bit DMA
105
ns
(3)
Notes: (1) When in Single Address mode,A6: A0 and
CS are ignored.
t
2 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).
(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.
,4-3
DIN
94
DACK
Last Packet Write
(Note)
t4
t3
t5
t6
t2
t1
DREQ
WR
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