參數(shù)資料
型號: UPD720122GC-9EU
廠商: NEC Corp.
英文描述: MOS Integrated Circuit
中文描述: 馬鞍山集成電路
文件頁數(shù): 27/82頁
文件大?。?/td> 650K
代理商: UPD720122GC-9EU
Data Sheet S16685EJ2V0DS
27
μ
PD720122
(b) CPU bus DMA single mode write transfer
Symbol
Parameter
Min.
Typ.
Max.
Unit
T35
DMA request acknowledge setup time (WRB
)
0
ns
T36
DMA request off time (EP2_DACKB
)
54
ns
T37
DMA single mode write transfer cycle time
88
ns
T38
Write command width
54
ns
T39
Write command inactive time
34
ns
T40
Write data setup time (WRB
)
10
ns
T41
Write data hold time (WRB
)
0
ns
T42
EP2_TCB setup time (WRB
)
0
Note
ns
T43
EP2_TCB hold time (WRB
)
17
ns
T44
DMA request acknowledge hold time (WRB
)
0
ns
Note
Can be input after immediately previous WRB
.
Remark
It is assumed that the external pin capacitance is 15 pF (data bus = 50 pF).
(Overall)
EP2_DRQB
EP2_TCB
D15 to D0
WRB
EP2_DACKB
t
36
t
38
t
37
t
39
t
40
t
41
High level
N cycle
N
1 cycle
1 cycle
t
35
t
44
t
40
t
41
t
44
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