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參數資料
| 型號： | CY28349B |
| 廠商： | Cypress Semiconductor Corp. |
| 英文描述： | FTG for Intel Pentium 4 CPU and Chipsets |
| 中文描述： | FTG的英特爾奔騰4處理器和芯片組 |
| 文件頁數： | 2/22頁 |
| 文件大?。?/td> | 174K |
| 代理商： | CY28349B |
CY28349B
Document #: 38-07454 Rev. *A
Page 2 of 22
Pin Definitions
Pin Name
Pin No.
3
Pin
Type
I
Pin Description
X1
Crystal Connection or External Reference Frequency Input:
This pin has dual
functions. It can be used as an external 14.318-MHz crystal connection or as an
external reference frequency input.
Crystal Connection:
Connection for an external 14.318-MHz crystal. If using an
external reference, this pin must be left unconnected.
Reference Clock 0/Current Multiplier Selection 0:
3.3V 14.318-MHz clock
output. This pin also serves as a power-on strap option to determine the current
multiplier for the CPU clock outputs. The MULTSEL1:0 definitions are as follows:
MULTSEL1:0
00 = Ioh is 4 x IREF
01 = Ioh is 5 x IREF
10 = Ioh is 6 x IREF
11 = Ioh is 7 x IREF
Reference Clock 1/Current Multiplier Selection 1:
3.3V 14.318-MHz clock
output. This pin also serves as a power-on strap option to determine the current
multiplier for the CPU clock outputs. The MULTSEL1:0 definitions are as follows:
MULTSEL1:0
00 = Ioh is 4 x IREF
01 = Ioh is 5 x IREF
10 = Ioh is 6 x IREF
11 = Ioh is 7 x IREF
CPU Clock Outputs:
Frequency is set by the FS0:4 inputs or through serial input
interface.
CPU Clock Output for ITP:
Frequency is set by the FS0:4 inputs or through serial
input interface.
66-MHz Clock Outputs:
3.3V fixed 66-MHz clock.
Free-running PCI Output 0/Frequency Select 2:
3.3V free-running PCI output.
This pin also serves as a power-on strap option to determine device operating
frequency as described in the Frequency Selection Table.
Free-running PCI Output 1/Frequency Select 3:
3.3V free-running PCI output.
This pin also serves as a power-on strap option to determine device operating
frequency as described in
Table 4
.
Free-running PCI Output 2:
3.3V free-running PCI output.
PCI Output 0/Frequency Select 4:
3.3V PCI output. This pin also serves as a
power-on strap option to determine device operating frequency as described in
Table 4
.
PCI Clock Output 1 to 6:
3.3V PCI clock outputs.
X2
4
O
REF0/MULTSEL0
48
I/O
REF1/MULTSEL1
1
I/O
CPU0:1, CPU0:1#
41, 38, 40, 37
O
CPU_ITP, CPU_ITP#
44, 45
I/O
3V66_0:2
PCI_F0/FS2
31, 30, 28
6
O
I/O
PCI_F1/FS3
7
I/O
PCI_F2
PCI0/FS4
8
I/O
I/O
10
PCI1:6
11, 12, 14, 15,
16, 17
22
O
48MHz_0/FS0
I/O
48MHz Output/Frequency Select 0:
3.3V fixed 48-MHz, non-spread spectrum
output. This pin also serves as a power-on strap option to determine device
operating frequency as described in
Table 4
.
This output will be used as the reference clock for USB host controller in Intel 845
(Brookdale) platforms. For Intel
Brookdale
–
G platforms, this output will be used
as the VCH reference clock.
24 or 48MHz Output/Frequency Select 1:
3.3V fixed 24-MHz or 48-MHz
non-spread spectrum output. This pin also serves as a power-on strap option to
determine device operating frequency as described in
Table 4
.
This output will be used as the reference clock for SIO devices in Intel
845
(Brookdale) platforms. For Intel
Brookdale
–
G platforms, this output will be used
as the reference clock for both USB host controller and SIO devices. We
recommend system designer to configure this output as 48 MHz and
“
HIGH Drive
”
by setting Byte [5], Bit [0] and Byte [9], Bit [7], respectively.
24_48MHz/FS1
23
I/O
相關PDF資料 |
PDF描述 |
|---|---|
| CY28349BOC | FTG for Intel Pentium 4 CPU and Chipsets |
| CY28349BOCT | FTG for Intel Pentium 4 CPU and Chipsets |
| CY28378 | FTG for Pentium 4 and Intel 845 Series Chipset |
| CY28378OC | FTG for Pentium 4 and Intel 845 Series Chipset |
| CY28378OCT | FTG for Pentium 4 and Intel 845 Series Chipset |
相關代理商/技術參數 |
參數描述 |
|---|---|
| CY28349B_05 | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:FTG for Intel㈢ Pentium㈢ 4 CPU and Chipsets |
| CY28349BOC | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| CY28349BOCT | 制造商:Rochester Electronics LLC 功能描述:FTG FOR INTEL 830M AND 845 CHIPSETS (CK-408) - Bulk |
| CY28349BOXC | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:FTG for Intel㈢ Pentium㈢ 4 CPU and Chipsets |
| CY28349BOXCT | 制造商:CYPRESS 制造商全稱:Cypress Semiconductor 功能描述:FTG for Intel㈢ Pentium㈢ 4 CPU and Chipsets |
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