IA63484
Data Sheet
Advanced CRT Controller
AC Characteristics:
Clock Timing:
9.8 MHz Version
Item
Symbol
Unit
Min
Max
9.8
Operation Frequency of clk_2
Clock Cycle Time
f
1
MHz
ns
tCYC
tPWCH
tPWCL
tcr
102
46
1000
500
500
5
Clock High Level Pulse Width
Clock Low Level Pulse Width
Clock Rise Time
ns
46
ns
ns
tcf
Clock Fall Time
5
ns
MPU Read / Write Cycle Timing:
9.8 MHz Version
Item
Symbol
Unit
Min
Max
tRWS
tRWH
tRSS
rw_n Setup Time
rw_n Hold Time
rs Setup Time
50
0
ns
ns
ns
ns
ns
ns
50
0
rs Hold Time
tRSH
tCSS
cs_n Setup Time
cs_n High Level Width
40
60
tWCSH
tRWAI
tRDAC
tRDH
Read Wait Time
0
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Read Data Access Time
Read Data Hold Time
80
10
Read Data Turn Off Time
dtack_n Delay Time (Z to L)
dtack_n Delay Time (D to L)
dtack_n Release Time (L to H)
dtack_n Turn Off Time (H to Z)
Data Bus 3-State Recovery Time 1
Write Wait Time
tRDZ
60
70
tDTKZL
tDTKDL
tDTKLH
tDTKZ
tDBRT1
tWWAI
tWDS
0
80
100
0
0
Write Data Setup Time
40
10
tWDH
Write Data Hold Time
Copyright ã 2001
innovASIC
ENG 21101041200
Page 24 of 32
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