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參數(shù)資料
| 型號： | CY28326 |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | FTG for VIA PT880 Serial Chipset |
| 中文描述： | FTG的威盛PT880系列芯片組 |
| 文件頁數(shù)： | 6/23頁 |
| 文件大?。?/td> | 288K |
| 代理商： | CY28326 |
CY28326
Document #: 38-07616 Rev. *A
Page 6 of 23
Byte 1: Control Register
Bit
7
6
5
4
3
@Pup
1
1
0
0
0
Name/Pin Affected
FS3
FS2
FS1
FS0
FS_Override/FS(D:A)
Description
SW frequency selection bits [3:0]. See table 2.
FS_Override
0 = Select operating frequency by FS(D:A) (HW Strapping) input bits,
1 = Select operating frequency by FSEL[3:0](SW Strapping) settings.
CPU[T/C]2
Powerdown/CPUSTP#
drive mode
0 = Driven in powerdown, 1 = Tri-state
CPU[T/C]1
Powerdown/CPUSTP#
drive mode
0 = Driven in powerdown, 1 = Tri-state
CPU[T/C]0
Powerdown/CPUSTP#
drive mode
0 = Driven in powerdown, 1 = Tri-state
2
0
CPU[T/C]2
1
0
CPU[T/C]1
0
0
CPU[T/C]0
Byte 2: Control Register
Bit
7
@Pup
0
Name/Pin Affected
PCIF[2:0]
Description
PCIF Clock Output Drive Strength
0 = Low drive strength, 1 = High drive strength
PCI Clock Output Drive Strength
0 = Low drive strength, 1 = High drive strength
AGP Clock Output Drive Strength
0 = Low drive strength, 1 = High drive strength
Don’t change, Default =0
6
0
PCI[6:0]
5
0
AGP[2:0]
4
0
Test bit
3
0
48 MHz, 24/48 MHz
48 MHz Clock Output Drive Strength
0 = Low drive strength, 1 = High drive strength
Reserved
REF Clock Output Drive Strength
0 = Low drive strength, 1 = High drive strength
Don’t change, Default =0
2
1
0
0
Reserved
REF[1:0]
0
0
Test bit
Byte 3: Control Register
Bit
7
6
5
@Pup
0
1
1
Name/Pin Affected
Spread Spectrum Sel
CPU
AGP
PCIF
PCI
Description
Spread Spectrum Selection
‘000’ = –1.25 ~ 0.25%
‘001’ = –1.0%
‘010’ = –0.75%
‘011’ = –0.5% (default)
‘100’ = ± 0.75%
‘101’ = ± 0.5%
‘110’ = ± 0.35%
‘111’ = ± 0.25%
AGP Skew control, relative to PCICLK
4
3
0
0
AGP_SKEW1
AGP_SKEW0
01 = –300ps
10 = +300ps
11 = +450ps
Spread Spectrum Enable/Disable Function
0 = Spread spectrum disable
1 = Spread spectrum enable
REF1 Output Enable
0 = Disabled, 1 = Enabled
REF0 Output Enable
0 = Disabled, 1 = Enabled
2
0
CPU,AGP,PCIF,PCI
1
1
REF1
0
1
REF0
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| CY28326OC | FTG for VIA PT880 Serial Chipset |
| CY28326OCT | FTG for VIA PT880 Serial Chipset |
| CY28326OXC | Single Pole Normally Open: 1-Form-A |
| CY28326OXCT | Single Pole Normally Open: 1-Form-A |
| CY28341-2 | Universal Clock Chip for VIA P4M/KT/KM400 DDR Systems |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CY28326OC | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:FTG for VIA PT880 Serial Chipset |
| CY28326OCT | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:FTG for VIA PT880 Serial Chipset |
| CY28326OXC | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CY28326OXCT | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:FTG for VIA PT880 Serial Chipset |
| CY28326SPC | 制造商:Cypress Semiconductor 功能描述: |
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