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参数资料
| 型号： | ICS9248YF-110LF |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 115 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封装： | 0.300 INCH, SSOP-48 |
| 文件页数： | 8/14页 |
| 文件大小： | 152K |
| 代理商： | ICS9248YF-110LF |
3
ICS9248-110
Third party brands and names are the property of their respective owners.
General Description
The ICS9248-110 is a main clock synthesizer chip for AMD-K7 based systems. This provides all clocks required for such a
system when used with a Zero Delay Buffer Chip such as the ICS9179-06.
Spread spectrum may be enabled through I
2C programming. Spread spectrum typically reduces system EMI by 8dB to
10dB. This simplifies EMI qualification without resorting to board design iterations or costly shielding. The ICS9248-110
employs a proprietary closed loop design, which tightly controls the percentage of spreading over process and temperature
variations.
Serial programming I
2C interface allows changing functions, stop clock programming and frequency selection.
CPU_STOP# Timing Diagram
CPU_STOP# is an asychronous input to the clock synthesizer. It is used to turn off the CPUCLKs for low power operation.
CPU_STOP# is synchronized by the ICS9248-110. All other clocks will continue to run while the CPUCLKs clocks are
disabled. The CPUCLKs will always be stopped in a low state and start in such a manner that guarantees the high pulse width
is a full pulse. CPUCLK on latency is less than 4 CPUCLKs and CPUCLK off latency is less than 4 CPUCLKs.
Notes:
1. All timing is referenced to the internal CPUCLK.
2. CPU_STOP# is an asynchronous input and metastable conditions may exist. This signal is
synchronized to the CPUCLKs inside the ICS9248-110.
3. All other clocks continue to run undisturbed.
4. PD# and PCI_STOP# are shown in a high (true) state.
PCICLK
CPUCLKT
CPUCLKC
PCI_STOP# (High)
CPU_STOP#
PD# (High)
INTERNAL
CPUCLK
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| ICS9248YF-126-T | 150 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| ICS9248YF-126LF | 150 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| ICS9248YF-141LF-T | 166.66 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| ICS9248YF-151-T | 200 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS9248YF-112-T | 制造商:ICS 制造商全称:ICS 功能描述:Frequency Generator & Integrated Buffers for Celeron & PII/III⑩ |
| ICS9248YF-114-T | 制造商:ICS 制造商全称:ICS 功能描述:AMD - K7⑩ System Clock Chip |
| ICS9248YF-126-T | 制造商:ICS 制造商全称:ICS 功能描述:Frequency Generator & Integrated Buffers for Celeron & PII/III⑩ & K6 |
| ICS9248YF-127-T | 制造商:ICS 制造商全称:ICS 功能描述:Frequency Generator & Integrated Buffers for PENTIUM/ProTM |
| ICS9248YF-128 | 制造商:ICS 制造商全称:ICS 功能描述:Frequency Generator & Integrated Buffers |
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