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): 65/82頁
文件大小: 1359K
代理商: TMS34020
TMS34020, TMS34020A
GRAPHICS PROCESSORS
SPVS004D – MARCH 1990 – REVISED NOVEMBER 1993
65
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
PARAMETER MEASUREMENT INFORMATION
local bus timing: bus control inputs (see Figure 40)
NO.
PARAMETER
’34020-32
’34020A-32
’34020A-40
UNIT
MIN
MAX
MIN
MAX
52
ta(CMV-LAV)
Access time, CAMD valid after address valid on LAD
3tQ–45
3tQ–37
ns
53
th(LANV-CMV)
Hold time, CAMD valid after address no longer valid on
LAD
0
0
ns
54
ta(BCV-ALL)
Access time, control valid (LRDY, PGMD, SIZE16,
BUSFLT) after ALTCH low
3tQ–35+ s
3tQ–27+ s
ns
55
th(CK2H-BCV)
Hold time, control (LRDY, PGMD, SIZE16, BUSFLT)
valid after LCLK2 high
0
0
ns
56
tsu(BCV-CK2
)
Setup time, SIZE16, LRDY, PGMD, BUSFLT valid be-
fore LCLK2
20
15
ns
CAMD, LRDY, PGMD, SIZE16, and BUSFLT are synchronous inputs. The specified setup, access, and hold times must be met for proper device
operation.
Address
55
56
53
52
55
54
Valid
Valid
Valid
Valid
Valid
LAD
BUSFLT
SIZE16
PGMD
LRDY
ALTCH
CAMD
LCLK2
LCLK1
Q1
Q4*
Q3
Q2
Q1
Q4*
Q3
Q2
Q1
Q4*
Q3
Q2
Q1
Valid
*See clock stretch, page 21.
Figure 40. Local Bus Timing: Bus Control Inputs
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