參數(shù)資料
型號(hào): 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(yè)數(shù): 44/82頁(yè)
文件大小: 650K
代理商: UPD720122GC-9EU
Data Sheet S16685EJ2V0DS
44
μ
PD720122
(a) External local bus 16-bit mode DMA single mode write transfer
Symbol
Parameter
Min.
Typ.
Max.
Unit
L16T35
DMA request acknowledge setup time (EP2_WRB
)
0
ns
L16T36
DMA request off time 1 (EP2_DACKB
)
54
ns
L16T37
DMA single mode write transfer cycle time
88
ns
L16T38
Write command width
54
ns
L16T39
Write command inactive time
34
ns
L16T40
Write data setup time (EP2_WRB
)
10
ns
L16T41
Write data hold time (EP2_WRB
)
0
ns
L16T42
EP2_TCB setup time (EP2_WRB
)
0
Note
ns
L16T43
EP2_TCB hold time (EP2_WRB
)
17
ns
L16T44
DMA request acknowledge hold time (EP2_WRB
)
0
ns
Note
Can be input after previous EP2_WRB
.
Remark
It is assumed that the external pin capacitance is 15 pF (data bus = 50 pF).
(Overall)
EP2_DRQB
EP2_TCB
LD15 to LD0
EP2_WRB
EP2_DACKB
N cycle
N
1 cycle
1 cycle
L16t
36
L16t
38
L16t
37
L16t
39
L16t
40
L16t
41
High level
L16t
35
L16t
44
L16t
41
L16t
40
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