UPD720122F1-DN2-A Renesas Electronics America, UPD720122F1-DN2-A Datasheet - Page 64
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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(d) External local bus 8-bit mode DMA demand write transfer timing
(Overall)
62
L8T58
L8T59
L8T60
L8T61
L8T62
L8T63
L8T66
L8T67
Symbol
Remarks 1.
EP2_DACKB
EP2_DRQB
EP2_WRB
LD7 to LD0
EP2_TCB
DMA request acknowledge setup time (EP2_WRB↓)
DMA demand mode write transfer cycle time
Write command width
Write command inactive time
Write data setup time (EP2_WRB↑)
Write data hold time (EP2_WRB↑)
DMA request off time (EP2_WRB↑)
DMA request acknowledge hold time (EP2_WRB↑)
2.
3.
L8t
High level
58
Use of EP1_TCB is prohibited in the 8-bit external local bus mode. Clamp this signal to the inactive
status.
LD15 to 8 are undefined in the 8-bit external local bus mode (these signals are invalid when input and
undefined when output).
It is assumed that the external pin capacitance is 15 pF (data bus = 50 pF).
L8t
L8t
62
60
1 cycle
L8t
59
L8t
L8t
61
63
Parameter
Data Sheet S16685EJ3V0DS
L8t
Min.
62
72
38
34
10
0
0
−
0
N − 1 cycle
L8t
Typ.
L8t
66
63
µ
PD720122
Max.
60
∞
∞
∞
∞
∞
∞
∞
N cycle
L8t
67
Unit
ns
ns
ns
ns
ns
ns
ns
ns
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