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參數(shù)資料
| 型號(hào)： | CY28341 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | CONN PLUG HOUSING SIZE 9 UPPER |
| 中文描述： | 通用單芯片時(shí)鐘為威盛P4M266/KM266的DDR系統(tǒng)解決方案 |
| 文件頁數(shù)： | 14/21頁 |
| 文件大小： | 189K |
| 代理商： | CY28341 |
CY28341
Document #: 38-07367 Rev. *A
Page 14 of 21
Rise and Fall Times
Power-down Deassertion (P4 Mode)
The power-up latency needs to be less than 3 mS.
AMD K7 Processor SELP4_K7# = 0
Power-down Assertion (K7 Mode)
When the PD# signal is asserted LOW, all clocks are disabled
to a LOW level in an orderly fashion prior to removing power
from the part. When PD# is asserted (forced) LOW, the device
transitions to a shutdown (power-down) mode and all power
supplies may then be removed. When PD# is sampled LOW
by two consecutive rising edges of CPU clock, then all affected
clocks are stopped in a LOW state as soon as possible. When
in power-down (and before power is removed), all outputs are
synchronously stopped in a LOW state (see figure3 below), all
PLL
’
s are shut off, and the crystal oscillator is disabled. When
the device is shutdown, the I2C function is also disabled.
PCI 33MHz
PW RDW N#
CPU 133MHz
CPU# 133MHz
AGP 66MHz
REF 14.318MHz
USB 48MHz
<1.5 msec
SDRAM 133MHz
DDRT 133MHz
DDRC 133MHz
Figure 3. Power-down Deassertion Timing Waveform (in P4 Mode)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CY28341ZC | Universal Single-Chip Clock Solution for VIA P4M266/KM266 DDR Systems |
| CY28341ZCT | Universal Single-Chip Clock Solution for VIA P4M266/KM266 DDR Systems |
| CY28341OCT | Universal Single-Chip Clock Solution for VIA P4M266/KM266 DDR Systems |
| CY28341OC | Universal Single-Chip Clock Solution for VIA P4M266/KM266 DDR Systems |
| CY28346 | Clock Synthesizer with Differential CPU Outputs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CY28341-2 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Universal Clock Chip for VIA P4M/KT/KM400 DDR Systems |
| CY28341-2_05 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Universal Clock Chip for VIA⑩P4M/KT/KM400 DDR Systems |
| CY28341-3 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:Universal Clock Chip for VIA⑩P4M/KT/KM400A DDR Systems |
| CY28341OC | 制造商:Rochester Electronics LLC 功能描述:FTG FOR VIA P4 CHIPSET - Bulk |
| CY28341OC-2 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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