UPD720122GC-9EU-A Renesas Electronics America, UPD720122GC-9EU-A Datasheet - Page 62

• Manufacturer Part Number: UPD720122GC-9EU-A
• Manufacturer: Renesas Electronics America

Specifications of UPD720122GC-9EU-A

• Lead Free Status / RoHS Status: Supplier Unconfirmed

(c) External local bus 8-bit mode DMA demand read transfer timing
(Overall)
60
L8T45
L8T46
L8T47
L8T48
L8T49
L8T50
L8T51
L8T54
L8T55
L8T56
L8T57
Symbol
Remarks 1.
EP1_STOPB
EP1_DACKB
EP1_DRQB
EP1_RDB
LD7 to LD0
EP1_TCB
DMA request acknowledge setup time (EP1_RDB ↓ )
DMA demand mode read transfer cycle time
Read command width
Read command inactive time
Read data delay time (EP1_RDB ↓ )
Buffer direction change time (EP1_RDB ↓ )
Read data hold time (EP1_RDB ↑ )
EP1_STOPB delay time (EP1_RDB ↓ )
EP1_STOPB delay time (EP1_RDB ↑ )
DMA request off time (EP1_RDB ↑ )
DMA request acknowledge hold time (EP1_RDB ↑ )
2.
3.
High level
High level
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
L8t
46
49
50
L8t
L8t
45
1 cycle
47
L8t
Parameter
51
L8t
48
Data Sheet S16685EJ3V0DS
Min.
90
56
34
0
−
−
4
−
3
−
0
N − 1 cycle
Typ.
EP1_STOPB is not asserted in the
case of a full Packet.
L8t
56
L8t
µ
PD720122
Max.
54
56
14
15
60
∞
∞
∞
∞
∞
−
−
L8t
L8t
N cycle
57
55
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns