参数资料
型号: W218
英文描述: Clocks and Buffers
中文描述: 时钟和缓冲器
文件页数: 5/17页
文件大小: 175K
代理商: W218
W218
Document #: 38-07221 Rev. *A
Page 5 of 17
Offsets Among Clock Signal Groups
Figure 3
and
Figure 4
represent the phase relationship among
the different groups of clock outputs from W218 when it is pro-
viding a 66-MHz CPU clock and a 100-MHz CPU clock, re-
spectively. It should be noted that when CPU clock is operating
at 100 MHz, CPU clock output is 180 degrees out of phase
with SDRAM clock outputs.
0 ns
Figure 3. Group Offset Waveforms (66-MHz CPU/100-MHZ SDRAM Clock)
40 ns
30 ns
20 ns
10 ns
CPU 66-MHz
SDRAM 100-MHz
3V66 66-MHz
PCI 33-MHz
REF 14.318-MHz
USB 48-MHz
DOT 48-MHz
Cycle Repeat
APIC33-MHz
0 ns
Figure 4. Group Offset Waveforms (100-MHz CPU/100-MHZ SDRAM Clock)
40 ns
30 ns
20 ns
10 ns
CPU 100-MHz
SDRAM 100-MHz
3V66 66-MHz
PCI 33-MHz
REF 14.318-MHz
USB 48-MHz
DOT 48-MHz
APIC 33-MHz
Cycle Repeat
相关PDF资料
PDF描述
W219 Clocks and Buffers
W219B Frequency Generator for Integrated Core Logic with 133-MHz FSB
W22010AI-20 x4 SRAM
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