UPD720122F1-DN2-A Renesas Electronics America, UPD720122F1-DN2-A Datasheet - Page 32
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UPD720122F1-DN2-A
Manufacturer Part Number
UPD720122F1-DN2-A
Description
Manufacturer
Renesas Electronics America
Datasheet
1.UPD720122F1-DN2-A.pdf
(86 pages)
Specifications of UPD720122F1-DN2-A
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Quantity
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Part Number:
UPD720122F1-DN2-A
Manufacturer:
NEC
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4 420
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(c) CPU bus DMA demand read transfer timing
(Overall)
30
T45
T46
T47
T48
T49
T50
T51
T52
T53
T54
T55
T56
T57
T69
T71
T72
T74
Symbol
EP1_DACKB
EP1_DRQB
RDB
D15 to D0
EP1_TCB
EP1_STOPB
Note
Remark It is assumed that the external pin capacitance is 15 pF (data bus = 50 pF).
Can be input after immediately previous RDB ↑ .
DMA request acknowledge setup time (RDB ↓ )
DMA demand mode read transfer cycle time
Read command width
Read command inactive time
Read data delay time (RDB ↓ )
Buffer direction change time (RDB ↓ )
Read data hold time (RDB ↑ )
EP1_TCB setup time (RDB ↓ )
EP1_TCB hold time (RDB ↓ )
EP1_STOPB delay time (RDB ↓ )
EP1_STOPB delay time (RDB ↑ )
DMA request off time (RDB ↑ )
DMA request acknowledge hold time (RDB ↑ )
DMA request off time (EP1_DACKB ↓ )
DMA request off time (EP1_DACKB ↓ ) 1 cycle transfer
DMA request on time (EP1_DACKB ↑ )
DMA request off time (RDB ↓ )
High level
High level
t
45
t
50
t
49
t
47
1 cycle
t
46
t
48
t
51
Parameter
Data Sheet S16685EJ3V0DS
Min.
91
57
34
17
0
−
−
4
0
−
3
−
0
−
−
−
−
N − 1 cycle
Typ.
t
56
EP1_STOPB is not asserted in the
case of a full packet.
t
54
µ
Note
PD720122
Max.
57
14
15
59
38
38
88
60
∞
∞
∞
∞
∞
∞
−
−
N cycle
Unit
t
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
55
t
57
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