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參數(shù)資料
| 型號(hào)： | CY2277A |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | 6x86, K6 Clock Synthesizer/Driver for Desktop Mobile PCs with Intel 82430TX and 2 DIMMs or 3 SO-DIMMs |
| 中文描述： | 6x86，K6時(shí)鐘合成器/桌面移動(dòng)與英特爾82430TX和2個(gè)DIMM或3，所以電腦驅(qū)動(dòng)器- DIMM內(nèi)存 |
| 文件頁數(shù)： | 2/19頁 |
| 文件大?。?/td> | 206K |
| 代理商： | CY2277A |
CY2277A
Document #: 38-07332 Rev. *A
Page 2 of 19
Pin Summary
Name
V
DDQ3
V
DDQ2
V
DDCPU
AV
DD
V
SS
XTALIN
[2]
XTALOUT
[2]
MODE
SEL
Pins
7, 15, 21, 28, 34
46
40
25, 48
3, 10, 17, 24, 31, 37, 43
4
5
6
18
Description
3.3V Digital voltage supply
IOAPIC Digital voltage supply, 2.5V
CPU Digital voltage supply, 2.5V or 3.3V
3.3V Analog voltage supply
Ground
Reference crystal input
Reference crystal feedback
Mode select input, enables power management features
Select input to enable 66.66 MHz or 60 MHz CPU clock (See Function
tables.)
SMBus serial data input for serial configuration port
SMBus serial clock input for serial configuration port
Active low control input to put osc., PLLs, and outputs in power down state
Power select input, indicates whether V
DDCPU
is at 2.5V or 3.3V
HIGH = 3.3V, LOW=2.5V (internal pull-up to V
DD
)
SDRAM clock output. Also, active LOW control input to stop PCI clocks,
enabled when MODE is LOW
SDRAM clock output. Also, active LOW control input to stop CPU clocks,
enabled when MODE is LOW
SDRAM clock outputs, have same frequency as CPU clocks
CPU clock outputs
PCI clock outputs
PCI clock output, free-running
IOAPIC clock output
Reference clock outputs, 14.318 MHz. REF0 drives 45 pF load
USB or IO clock outputs, frequency selected by serial word
SDATA
SCLK
PWR_DWN
PWR_SEL
19
20
44
47
SDRAM7/PCI_STOP
26
SDRAM6/CPU_STOP
27
SDRAM[0:5]
CPUCLK[0:3]
PCICLK[0:5]
PCICLK_F
IOAPIC
REF[0:1]
USBCLK/IOCLK
36, 35, 33, 32, 30, 29
42, 41, 39, 38
9, 11, 12, 13, 14, 16
8
45
1, 2
22, 23
Note:
2.
For best accuracy, use a parallel-resonant crystal, C
LOAD
= 18 pF.
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相關(guān)代理商/技術(shù)參數(shù) |
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| CY2277APAC-12M | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:6x86, K6 Clock Synthesizer/Driver for Desktop Mobile PCs with Intel 82430TX and 2 DIMMs or 3 SO-DIMMs |
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| CY2277APAC4 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Interface IC |
| CY2277APAC-7M | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:6x86, K6 Clock Synthesizer/Driver for Desktop Mobile PCs with Intel 82430TX and 2 DIMMs or 3 SO-DIMMs |
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