参数资料
型号: CY28548ZXC
厂商: Silicon Laboratories Inc
文件页数: 11/30页
文件大小: 0K
描述: IC CLK CK505 960M/965M 64TSSOP
标准包装: 28
类型: 时钟/频率发生器
PLL:
主要目的: Intel CPU 服务器
输入: 时钟
输出: LVCMOS
电路数: 1
比率 - 输入:输出: 3:22
差分 - 输入:输出: 无/是
频率 - 最大: 400MHz
电源电压: 3.135 V ~ 3.465 V
工作温度: 0°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 64-TFSOP (0.240",6.10mm 宽)
供应商设备封装: 64-TSSOP
包装: 管件
CY28548
......................Document #: 001-08400 Rev ** Page 19 of 30
CPU_STP# Assertion
The CPU_STP# signal is an active LOW input used for
synchronous stopping and starting the CPU output clocks
while the rest of the clock generator continues to function.
When the CPU_STP# pin is asserted, all CPU outputs that are
set with the SMBus configuration to be stoppable are stopped
within two to six CPU clock periods after sampled by two rising
edges of the internal CPUC clock. The final states of the
stopped CPU signals are CPUT = HIGH and CPUC = LOW.
CPU_STP# Deassertion
The deassertion of the CPU_STP# signal causes all stopped
CPU outputs to resume normal operation in a synchronous
manner. No short or stretched clock pulses are produced when
the
clock
resumes.
The
maximum
latency
from
the
deassertion to active outputs is no more than two CPU clock
cycles.
CPU_STP#
CPUT
CPUC
Figure 6. CPU_STP# Assertion Waveform
CPU_STP#
CPUT
CPUC
CPUT Internal
Tdrive_CPU_STP#,10 ns>200 mV
CPUC Internal
Figure 7. CPU_STP# Deassertion Waveform
CPUC(Stoppable)
CPUT(Stoppable)
CPUC(Free Running
CPUT(Free Running
PD#
1.8 ms
CPU_STOP#
DOT96C
DOT96T
Figure 8. CPU_STP# = Driven, CPU_PD = Driven, DOT_PD = Driven
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