參數(shù)資料
型號(hào): ICS950811
英文描述: Frequency Generator with 200MHz Differential CPU Clocks
中文描述: 頻率發(fā)生器200MHz的CPU的時(shí)鐘差分
文件頁(yè)數(shù): 14/18頁(yè)
文件大?。?/td> 302K
代理商: ICS950811
14
ICS950811
0482E—08/09/07
Assertion of PCI_STOP# Waveforms
PCI_STOP# - Assertion (transition from logic "1" to logic "0")
CPU_STOP#
CPUT
CPU_STOP# - Assertion (transition from logic "1" to logic "0")
Assertion of CPU_STOP# Waveforms
CPU_STOP# Functionality
#
P
O
T
S
_
U
P
C
T
U
P
C
C
U
P
C
1
l
m
r
N
l
m
r
N
0
t
M
*
f
t
o
PCI_STOP#
PCI_F[2:0] 33MHz
PCI[6:0] 33MHz
tsu
The impact of asserting the PCI_STOP# signal will be the following. All PCI[6:0] and stoppable PCI_F[2,0] clocks will
latch low in their next high to low transition. The PCI_STOP# setup time tsu is 10 ns, for transitions to be recognized
by the next rising edge.
The impact of asserting the CPU_STOP# pin is all CPU outputs that are set in the I
2
C configuration to be stoppable
via assertion of CPU_STOP# are to be stopped after their next transition following the two CPU clock edge sampling
as shown. The final state of the stopped CPU signals is CPUT=High and CPUC=Low. There is to be no change to the
output drive current values. The CPUT will be driven high with a current value equal to (MULTSEL0) X (I REF), the CPUC
signal will not be driven.
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