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參數(shù)資料
| 型號： | SMJ34020AGB |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | GRAPHICS SYSTEM PROCESSOR |
| 中文描述： | 圖形系統(tǒng)處理器 |
| 文件頁數(shù)： | 69/92頁 |
| 文件大小： | 1458K |
| 代理商： | SMJ34020AGB |
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SMJ34020A
GRAPHICS SYSTEMPROCESSOR
SGUS011B – APRIL 1991 – REVISED AUGUST 1995
69
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
output signal characteristics
The following general parameters are common to all output signals from the SMJ34020A unless otherwise
stated. They are intended as an aid in estimating the timing requirements. Please refer to the specific numbered
parameters for actual times. In the minimum and maximum values shown, “n” is an integral number of quarter
cycles.
PARAMETER
SMJ34020A-32
MIN
tQ – 15
UNIT
MAX
th(CK-SGNV)
Hold time, LCLKx to output signal not valid
ns
td(CK-SGV)
Delay time, LCLKx start of transition to output signal
valid
Fast: RAS, CAS, ALTCH,
TR/QE, DDOUT, DDIN,
EMU3, HOE, R0, R1,
HDST, WE
Slow: LAD, RCA, SF
tQ+15
ns
tQ+22
ns
td(SGNV-SGV)
Delay time, output signal started transition to output
signal valid
Fast: RAS, CAS, ALTCH,
TR/QE, DDOUT, DDIN,
EMU3, HOE, R0, R1,
HDST, WE
nQ+15
ns
Slow: LAD, RCA, SF
nQ+22
ns
td(SGV-SG)
Delay time, output signal valid to output signal not valid
Fast: RAS, CAS, ALTCH,
TR/QE, DDOUT, DDIN,
EMU3, HOE, R0, R1,
HDST, WE
nQ–15
nQ–16§
ns
Slow: LAD, RCA, SF
nQ–22
ns
tt(SG)
Output signal transition time
Fast: RAS, CAS, ALTCH,
TR/QE, DDOUT, DDIN,
EMU3, HOE, R0, R1,
HDST, WE
15
ns
Slow: LAD, RCA, SF
22
ns
tw(SGH)
Pulse duration, output signal high
Fast: RAS, CAS, ALTCH,
TR/QE, DDOUT, DDIN,
EMU3, HOE, R0, R1,
HDST, WE
nQ–15
ns
Slow: LAD, RCA, SF
nQ–22
ns
tw(SGL)
Pulse duration, output signal low
Fast: RAS, CAS, ALTCH,
TR/QE, DDOUT, DDIN,
EMU3, HOE, R0, R1,
HDST, WE
nQ–15
ns
Slow: LAD, RCA, SF
nQ–22
ns
Also refer to Figure 34 on following page.
For parameters on this page specifying minimum or maximum times between two output signals, the word fast or slow in column 2 refers to the
signal with a subscript of 1, regardless of the other signal. For example, if you are using the spec th(SG2NV-SG1V), use the slow value if the signal
becoming valid (SG1) is RCA, LAD, or SF; use the fast value otherwise. The pin referred to as SG2 does not determine fast or slow signal time.
§See parameter 73 in “l(fā)ocal-bus timing: bus control inputs” table.
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