FTG. CY28349 Datasheet

CY28349 Datasheet PDF


Part

CY28349

Description

FTG

Manufacture

SpectraLinear

Page 20 Pages
Datasheet
Download CY28349 Datasheet


CY28349 Datasheet
CY28349
FTG for Intel® Pentium® 4 CPU and Chipsets
Features
• Compatible to Intel® CK-Titan & CK-408 Clock Synthe-
sizer/Driver Specifications
• System frequency synthesizer for Intel Brookdale 845
www.DataSheeta4nUd.coBmrookdale - G Pentium® 4 Chipsets
• Programmable clock output frequency with less than
1 MHz increment
• Integrated fail-safe Watchdog timer for system
recovery
• Automatically switch to HW selected or SW
programmed clock frequency when watchdog timer
time-out
• Fixed 3V66 and PCI output frequency mode
• Capable of generating system RESET after a Watchdog
timer time-out occurs or a change in output frequency
via SMBus interface
• Support SMBus byte read/write and block read/ write
operations to simplify system BIOS development
• Vendor ID and Revision ID support
• Programmable drive strength support
• Programmable output skew support
• Power management control inputs
• Available in 48-pin SSOP
CPU
3V66
PCI
REF
48M
24_48M
x 3 x 4 x 10 x 2 x 1 x 1
Block Diagram
X1
X2
*FS0:4
VTT_PWRGD#
*MULTSEL0:1
XTAL
OSC
PLL Ref Freq
PLL 1
Divider
Network
PWR_DWN#
PLL2
SDATA
SCLK
SMBus
Logic
2
VDD_REF
REF0:1
Pin Configuration [1]
*MULTSEL1/REF1
VDD_CPU
CPU0:1, CPU0:1#,
VDD_REF
CPU_ITP, CPU_ITP#
X1
X2
GND_PCI
*FS2/PCI_F0
*FS3/PCI_F1
PCI_F2
VDD_PCI
VDD_3V66
*FS4/PCI0
3V66_0:2
PCI1
PCI2
VDD_PCI
PCI_F0:2
GND_PCI
PCI3
PCI4
PCI0:6
VDD_48MHz
3V66_3/48MHz_1
PCI5
PCI6
VDD_PCI
VDD_48MHz
VTT_PWRGD#
48MHz_0
RST#
GND_48MHz
24_48MHz
*FS0/48MHz_0
*FS1/24_48MHz
VDD_48MHz
RST#
1 48
2 47
3 46
4 45
5 44
6 43
7 42
8 41
9 40
10 39
11 38
12 37
13 36
14 35
15 34
16 33
17 32
18 31
19 30
20 29
21 28
22 27
23 26
24 25
SSOP-48
REF0/MULTSEL0*
GND_REF
VDD_CPU
CPU_ITP
CPU_ITP#
GND_CPU
PWR_DWN#
CPU0
CPU0#
VDD_CPU
CPU1
CPU1#
GND_CPU
IREF
VDD_CORE
GND_CORE
VDD_3V66
3V66_0
3V66_1
GND_3V66
3V66_2
3V66_3/48MHz_1
SCLK
SDATA
Note:
1. Signals marked with ‘*’ and “^” have internal pull-up and pull-down resistors respectively.
Rev 1.0, November 24, 2006
2200 Laurelwood Road, Santa Clara, CA 95054
Tel:(408) 855-0555 Fax:(408) 855-0550
Page 1 of 20
www.SpectraLinear.com

CY28349 Datasheet
CY28349
Pin Definitions
Pin Name
X1
X2
REF0/MULTSEL0
www.DataSheet4U.com
REF1/MULTSEL1
CPU0:1, CPU0:1#
CPU_ITP,
CPU_ITP#
3V66_0:2
PCI_F0/FS2
PCI_F1/FS3
PCI_F2
PCI0/FS4
PCI1:6
48MHz_0/FS0
24_48MHz/FS1
3V66_3/48MHz_1
Pin No.
3
4
48
1
41, 38, 40,
37
44, 45
31, 30, 28
6
7
8
10
11, 12, 14,
15, 16, 17
22
23
27
Pin
Type
I
O
I/O
I/O
O
I/O
O
I/O
I/O
I/O
I/O
O
Pin Description
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.
I/O 48 MHz 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.
I/O 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.
O 48 MHz or 66 MHz Output: 3.3V output.
Rev 1.0, November 24, 2006
Page 2 of 20


Features Datasheet pdf CY28349 FTG for Intel® Pentium® 4 CPU and Chipsets Features • Compatible to Intel® CK-Titan & CK-408 Clock Synthe sizer/Driver Specifications • System frequency synthesizer for Intel Brookda le 845 and Brookdale - G Pentium® 4 Ch ipsets www.DataSheet4U.com • Programm able clock output frequency with less t han 1 MHz increment • Integrated fail -safe Watchdog timer for system recover y • Automatically switch to HW select ed or SW programmed clock frequency whe n watchdog timer time-out • Fixed 3V6 6 and PCI output frequency mode • Cap able of generating system RESET after a Watchdog timer time-out occurs or a ch ange in output frequency via SMBus inte rface • Support SMBus byte read/write and block read/ write operations to si mplify system BIOS development • Vend or ID and Revision ID support • Progr ammable drive strength support • Prog rammable output skew support • Power management control inputs • Available in 48-pin SSOP CPU x3 3V66 x4 PCI x 10 REF x2 48M x1 24_48M x1 Block Diagram X1 X2 Pin Con.
Keywords CY28349, datasheet, pdf, SpectraLinear, FTG, Y28349, 28349, 8349, CY2834, CY283, CY28, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute, Equivalent




@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)