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参数资料
| 型号： | C9827JT |
| 英文描述： | Up to 5A ULDO linear regulator |
| 中文描述： | CPU系统时钟发生器|采用TSSOP | 56PIN |塑料 |
| 文件页数： | 15/25页 |
| 文件大小： | 170K |
| 代理商： | C9827JT |
C9827J
High Performance Pentium 4 Clock Synthesizer
Cypress Semiconductor Corporation
525 Los Coches St.
Milpitas, CA 95035. Tel: 408-263-6300, Fax: 408-263-6571
http://www.cypress.com
Document#: 38-07107 Rev. **
5/24/2001
Page 15 of 25
Special Functions
PCI_F and IOAPIC Clock Outputs
The PCIF clock outputs are intended to be used, if required, for systems IOAPIC clock functionality. ANY 2 of the PCI_F
clock outputs can be used as IOAPIC 33Mhz clock outputs. They are 3.3V outputs will be divided down via a simple
resistive voltage divider to meet specific system IOAPIC clock voltage requirements. In the event these clocks are not
required, then these clocks can be used as general PCI clocks or disabled via the assertion of the PCI_STP# pin.
3V66_1/VCH Clock Output
The 3V66_1/VCH pin has a dual functionality, which is selectable via SMBus.
Configured as DRCG (66M), SMBus Byte0, Bit 5 = ‘0’
The default condition for this pin is to power up in a 66M operation. In 66M operation this output is SSCG capable and
when spreading is turned on, this clock will be modulated.
Configured as VCH (48M), SMBus Byte0, Bit 5 = ‘1’
In this mode, the output is configured as a 48Mhz non-spread spectrum output. This output is phase aligned with the
other 48M outputs (USB and DOT), to within 1ns pin to pin skew. The switching of 3V66_1/VCH into VCH mode occurs
at system power on. When the SMBus Bit 5 of Byte 0 is programmed from a ‘0’ to a ‘1’, the 3V66_1/VCH output may
glitch while transitioning to 48M output mode.
CPU_STP# Clarification
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.
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相关代理商/技术参数 |
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| C9827JY | 制造商:未知厂家 制造商全称:未知厂家 功能描述:CPU SYSTEM CLOCK GENERATOR|SSOP|56PIN|PLASTIC |
| C982P | 制造商:PERKINELMER 制造商全称:PerkinElmer Optoelectronics 功能描述:CHANNEL PHOTO MULTIPLIER |
| C983 | 制造商:PERKINELMER 制造商全称:PerkinElmer Optoelectronics 功能描述:CHANNEL PHOTO MULTIPLIER |
| C9832HT | 制造商:未知厂家 制造商全称:未知厂家 功能描述:CPU SYSTEM CLOCK GENERATOR|TSSOP|56PIN|PLASTIC |
| C9832HY | 制造商:未知厂家 制造商全称:未知厂家 功能描述:CPU SYSTEM CLOCK GENERATOR|SSOP|56PIN|PLASTIC |
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