參數(shù)資料
型號： TMS34020
廠商： Texas Instruments, Inc.
英文描述： GRAPHICS PROCESSORS
中文描述： 圖形處理器
文件頁數(shù)： 59/82頁
文件大小： 1359K
代理商： TMS34020
TMS34020, TMS34020A
GRAPHICS PROCESSORS
SPVS004D – MARCH 1990 – REVISED NOVEMBER 1993
59
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
PARAMETER MEASUREMENT INFORMATION
output signal characteristics
The following general parameters are common to all output signals from the TMS34020 unless otherwise
specifically given. In the minimum and maximum values given, nis an integral number of quarter cycles.
PARAMETER
’34020-32
’34020A-32
’34020A-40
UNIT
MIN
MAX
MIN
MAX
th(CKx-SGNV)
Hold time, LCLKx to output signal not valid
tQ – 15
tQ – 13.5
ns
td(CKx-SGV)
Delay time, LCLKx start of transi-
tion to output signal valid
Fast: RAS, CAS, ALTCH,
TR/QE, DDOUT, DDIN,
EMU3, HOE, R0, R1,
HDST, WE
Slow: LAD, RCA, SF
tQ+15
tQ+13.5
ns
tQ+22
tQ+20
ns
th(SG1V-SG2NV)
Hold time, output signal valid to
output signal not valid
Fast: RAS, CAS, ALTCH,
TR/QE, DDOUT, DDIN,
EMU3, HOE, R0, R1,
HDST, WE
ntQ–15
ntQ–13.5
ns
Slow: LAD, RCA, SF
ntQ–22
ntQ–20
ns
td(SG2NV-SG1V)
Delay time, output signal started
transition to output signal valid
Fast: RAS, CAS, ALTCH,
TR/QE, DDOUT, DDIN,
EMU3, HOE, R0, R1,
HDST, WE
ntQ+15
ntQ+13.5
ns
Slow: LAD, RCA, SF
ntQ+22
ntQ+20
ns
tt(SG)
Output signal transition time
Fast: RAS, CAS, ALTCH,
TR/QE, DDOUT, DDIN,
EMU3, HOE, R0, R1,
HDST, WE
15
13.5
ns
Slow: LAD, RCA, SF
22
20
ns
tw(SGH)
Pulse duration, output signal high
Fast: RAS, CAS, ALTCH,
TR/QE, DDOUT, DDIN,
EMU3, HOE, R0, R1,
HDST, WE
ntQ–15
ntQ–13.5
ns
Slow: LAD, RCA, SF
ntQ–22
ntQ–20
ns
tw(SGL)
Pulse duration, output signal low
Fast: RAS, CAS, ALTCH,
TR/QE, DDOUT, DDIN,
EMU3, HOE, R0, R1,
HDST, WE
ntQ–15
ntQ–13.5
ns
Slow: LAD, RCA, SF
ntQ–22
ntQ–20
ns
Also refer to Figure 35 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.
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