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): 41/82頁(yè)
文件大?。?/td> 650K
代理商: UPD720122GC-9EU
Data Sheet S16685EJ2V0DS
41
μ
PD720122
2.6.4
External local bus
(1) External local bus 16-bit mode
(a) External local bus 16-bit mode DMA single mode read transfer timing
Symbol
Parameter
Min.
Typ.
Max.
Unit
L16T21
DMA request acknowledge setup time (EP1_RDB
)
0
ns
L16T22
DMA request off time 1 (EP1_DACKB
)
54
ns
L16T23
DMA single mode read transfer cycle time
91
ns
L16T24
Read command width
57
ns
L16T25
Read command inactive time
34
ns
L16T26
Read data delay time (EP1_RDB
)
57
ns
L16T27
Buffer direction change time (EP1_RDB
)
14
ns
L16T28
Read data hold time (EP1_RDB
)
4
ns
L16T29
EP1_TCB setup time (EP1_RDB
)
0
Note
ns
L16T30
EP1_TCB hold time (EP1_RDB
)
17
ns
L16T31
EP1_STOPB delay time (EP1_RDB
)
15
ns
L16T32
EP1_STOPB delay time (EP1_RDB
)
3
ns
L16T33
DMA request acknowledge hold time (EP1_RDB
)
0
ns
L16T34
Undefined
ns
Note
Can be input after previous EP1_RDB
.
Remark
It is assumed that the external pin capacitance is 15 pF (data bus = 50 pF).
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