SMJ34020A Datasheet, PDF (79/92 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)
NO.
Hold time, LAD0 – LAD31 read data valid
62
th(LAV-CTV) after earlier of DDIN, low after RAS,
CAS, or TR / QE high
76
td(CK1L-REL)
Delay time, RAS low after LCLK1 no
longer high
77
td(CK1L-REH)
Delay time, RAS high after LCLK1 no
longer high
78
td(CK1H-CEL)
Delay time, CAS low after LCLK1 no
longer low
79
td(CK1L-CEH)
Delay time, CAS high after LCLK1 no
longer high
80
td(CK2L-WEL)
Delay time, WE low after LCLK2 no
longer high
81
td(CK1L-WEH)
Delay time, WE high after LCLK1 no
longer high
Delay time, TR / QE low after LCLK2 no
82
td(CK2L-TRL) _{longer high}
83
td(CK1L-TRH)
Delay time, TR / QE high after LCLK1 no
longer high
84
td(CK1H-SFV)
Delay time, SF valid after LCLK1 no
longer low
85
td(CK2L-SFV)
Delay time, SF valid after LCLK2 no
longer high
Delay time, SF in the high-impedance
86
td(CK2L-SFZ) _{state after LCLK2 no longer high}
87
tsu(ADV-REL)‡
Setup time, row address valid before
RAS no longer high
88
th(ADV-REL)‡
Hold time, row address valid after RAS
low
89
tsu(RCV-CEL)
Setup time, column address valid before
CAS no longer high
Hold time, column address valid after
90
th(RCV-CEH) _{CAS high}
91
tsu(CAV-CEL)
Setup time, write data valid before CAS
no longer high
92
th(CAV-CEH)
Hold time, write data valid after CAS no
longer low
93
ta(LAV-REL)
Access time, data-in valid after RAS low
(assuming maximum transition time)
94
ta(LAV-CEL)
Access time, data-in valid after CASL no
longer high
95
ta(LAV-RCV)
Access time, data-in valid after column
address valid
† _{These values are derived from characterization data and are not tested.}
‡ _{Parameters 87 and 88 also apply to WE, TR / QE, and SF relative to RAS.}
NOTES: 4. s = tQ if using the clock stretch;
s = 0 otherwise
8. Parameter 96 has been eliminated.
’34020A-32
MIN
MAX
3.5
tQ + 12+s
tQ + 12
tQ + 12
tQ + 12
tQ + 15+s
tQ + 15
tQ + 15+s
tQ + 15
tQ + 22
tQ + 22+s
tQ + 22 ^†
2tQ – 22
tQ – 5+ s
tQ – 22
tQ – 15
tQ – 22
tQ – 15
4tQ – 8+s
2tQ –8+s
3tQ –20+s
’34020A-40
UNIT
MIN
MAX
3.5
ns
tQ + 10 + s ns
tQ + 10 ns
tQ + 10 ns
tQ + 10 ns
tQ + 13.5 + s ns
tQ + 15 ns
tQ + 13.5 + s ns
tQ + 13.5 ns
tQ + 20 ns
tQ + 20 + s ns
tQ + 20 ^† ns
2tQ – 20
ns
tQ – 5 + s
ns
tQ – 20
ns
tQ – 13.5
ns
tQ – 20
ns
tQ – 13.5
ns
4tQ – 8 + s ns
2tQ – 8+s ns
3tQ – 12 ns
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