參數(shù)資料
型號: GS4911B
廠商: Gennum Corporation
英文描述: HD/SD/Graphics Clock and Timing Generator with GENLOCK
中文描述: 高清/標清/圖形時鐘和定時發(fā)生器鎖相
文件頁數(shù): 33/113頁
文件大?。?/td> 1017K
代理商: GS4911B
GS4911B/GS4910B Data Sheet
36655 - 2
April 2006
33 of 113
Digital Timing Output Rise/Fall
Times
15pF load
20% - 80%
IO_VDD = 1.8V
current drive = LOW
3.0
ns
IO_VDD = 3.3V
current drive = LOW
1.5
ns
IO_VDD = 1.8V
current drive =
HIGH
2.5
ns
IO_VDD = 3.3V
current drive =
HIGH
1.4
ns
GSPI
GSPI Input Clock Frequency
f
GSPI
10.0
MHz
7
GSPI Clock Duty Cycle
DC
GSPI
40
60
%
7
GSPI Input Setup Time
t
3
in
Figure 3-18
1.5
ns
7
GSPI Input Hold Time
t
8
in
Figure 3-18
1.5
ns
7
NOTES
1. The video output clock may be directly connected to Gennum’s GS1532 or GS1531 serializer for a SMPTE-compliant SDI or HD-SDI
output with output jitter below 0.2UI, when the serializer is configured for a loop bandwidth of 100KHz.
2. All SD standards EXCEPT VID_STD[5:0] = 1 (450ps typ.) and VID_STD[5:0] = 5 or 6 (500ps typ.)
3. All HD and Graphics standards EXCEPT VID_STD[5:0] = 22 (300ps typ.) and VID_STD[5:0] = 41-43 (400ps typ.)
4. Timings from any CLK output to any other CLK output.
5. If fs=96kHz and ACLK is configured to output a clock signal at 192fs or 384fs, a 512fs clock will typically have a 33% duty cycle distortion.
See
Section 3.7.2 on page 63
.
6. With PCLK phasing delay set to nominal (zero offset), each increment of the clock phasing adjustment decreases output hold time and
delay time by a nominal 700ps. The times t
OD
and t
OH
are defined in
Figure 2-1
.
7. For detailed GSPI timing parameters, please refer to
Table 3-12
.
Table 2-2: AC Electrical Characteristics (Continued)
V
DD
= 1.8V, T
A
= 0°C to 70°C, unless otherwise specified.
Parameter
Symbol
Condition
Min
Typ
Max
Units
Notes
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