UPD720122GC-9EU Просмотр технического описания (PDF) - NEC => Renesas Technology
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UPD720122GC-9EU Datasheet PDF : 82 Pages
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µPD720122
2.6.2 AC characteristics of BIU block with Function 1 selected
(1) CPU BUS read operation
Symbol
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
Parameter
Read cycle time
Address setup time (RDB↓)
Chip select setup time (RDB↓)
Buffer direction change time (RDB↓)
Output data delay time (RDB↓)
Read command width
Chip select hold time (RDB↑)
Address hold time (RDB↑)
RDB inactive time
Output data hold time (RDB↑)
Min.
Typ.
Max.
Unit
91
∞
ns
5
∞
ns
5
∞
ns
−
14
ns
−
57
ns
57
∞
ns
5
∞
ns
5
∞
ns
34
∞
ns
4
−
ns
Remark It is assumed that the external pin capacitance is 15 pF (data bus = 50 pF).
CPU bus read timing
t1
A7 to A1
t2
CSB
t3
RDB
VALID
t6
t8
t7
t9
WRB
High level
D15 to D0
t5
t4
INVALID
t10
VALID
High level
Data Sheet S16685EJ2V0DS
21
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