参数资料
型号: CY28411ZXC
厂商: Silicon Laboratories Inc
文件页数: 3/18页
文件大小: 0K
描述: IC CLOCK CK410M ALVISO 56TSSOP
标准包装: 35
类型: 时钟/频率发生器
PLL:
主要目的: Intel CPU 服务器
输入: LVTTL,晶体
输出: HCSL,LVCMOS
电路数: 1
比率 - 输入:输出: 3:19
差分 - 输入:输出: 无/是
频率 - 最大: 133MHz
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: 56-TFSOP(0.240",6.10mm 宽)
供应商设备封装: 56-TSSOP
包装: 管件
其它名称: SLCY28411ZXC
CY28411
...................... Document #: 38-07594 Rev. *B Page 11 of 18
PCI_STP# Assertion[1]
The PCI_STP# signal is an active LOW input used for
synchronous stopping and starting the PCI outputs while the
rest of the clock generator continues to function. The set-up
time for capturing PCI_STP# going LOW is 10 ns (tSU). (See
Figure 9.) The PCIF clocks will not be affected by this pin if
their corresponding control bit in the SMBus register is set to
allow them to be free running.
PCI_STP# Deassertion
The deassertion of the PCI_STP# signal will cause all PCI and
stoppable PCIF clocks to resume running in a synchronous
manner within two PCI clock periods after PCI_STP# transi-
tions to a high level.
Note:
1. The PCI STOP function is controlled by two inputs. One is the device PCI_STP# pin number 34 and the other is SMBus byte 0 bit 3. These two inputs are logically
OR’ed. If either the external pin or the internal SMBus register bit is set low then the stoppable PCI clocks will be stopped in a logic low state. Reading SMBus
Byte 0 Bit 3 will return a 0 value if either of these control bits are set LOW thereby indicating the device’s stoppable PCI clocks are not running.
DOT96C
DOT96T
CPUC(Stoppable)
CPUT(Stoppable)
CPUC(Free Running)
CPUT(Free Running)
PD
1.8mS
CPU_STOP#
Figure 8. CPU_STP# = Hi-Z, CPU_PD = Hi-Z, DOT_PD = tHi-Z
Tsu
PCI_STP#
PCI_F
PCI
SRC 100MHz
Figure 9. PCI_STP# Assertion Waveform
PCI_STP#
PCI_F
PCI
SRC 100MHz
Tsu
Tdrive_SRC
Figure 10. PCI_STP# Deassertion Waveform
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