SMJ34020A Datasheet, PDF (80/92 Pages) Texas Instruments – GRAPHICS SYSTEM PROCESSOR

SMJ34020A
GRAPHICS SYSTEM PROCESSOR
SGUS011B – APRIL 1991 – REVISED AUGUST 1995
local-bus timing: RAS, CAS0–CAS3, WE, TR/QE, and SF (see Notes 4 and 8 and Figure 42)
(continued)
NO.
97
tsu(WEL-CEL)
Setup time, write low before CAS no
longer high (on write cycles)
98
tw(REH)
Pulse duration, RAS high
99
tw(REL)
Pulse duration, RAS low
100 tw(CEH)
Pulse duration, CAS high
101 tw(CEL)
Pulse duration, CAS low
102
td(REL-CEH)
Delay time, RAS low to CAS no longer
low
NOTES: 4. s = tQ if using the clock stretch;
s = 0 otherwise
8. Parameter 96 has been eliminated.
’34020A-32
MIN
MAX
’34020A-40
UNIT
MIN
MAX
tQ – 15
tQ – 13.5
ns
4tQ – 12 + s
4tQ – 10 + s
ns
4ntQ – 12 + s
4n tQ – 4 + s
ns
2tQ – 12
2tQ – 10
ns
2tQ – 12
2tQ – 8
ns
4tQ – 12 + s
4tQ – 4+s
ns
80
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