參數(shù)資料
型號(hào): CY28548ZXCT
廠商: Silicon Laboratories Inc
文件頁數(shù): 11/30頁
文件大?。?/td> 0K
描述: IC CLK CK505 960M/965M 64TSSOP
標(biāo)準(zhǔn)包裝: 2,000
類型: 時(shí)鐘/頻率發(fā)生器
PLL:
主要目的: Intel CPU 服務(wù)器
輸入: 時(shí)鐘
輸出: LVCMOS
電路數(shù): 1
比率 - 輸入:輸出: 3:22
差分 - 輸入:輸出: 無/是
頻率 - 最大: 400MHz
電源電壓: 3.135 V ~ 3.465 V
工作溫度: 0°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 64-TFSOP (0.240",6.10mm 寬)
供應(yīng)商設(shè)備封裝: 64-TSSOP
包裝: 帶卷 (TR)
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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