IDTCV146PVG IDT, Integrated Device Technology Inc, IDTCV146PVG Datasheet

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IDTCV146PVG

Manufacturer Part Number
IDTCV146PVG
Description
IC FLEXPC CLK PROGR P4 56-SSOP
Manufacturer
IDT, Integrated Device Technology Inc
Series
FlexPC™r
Type
PC Clockr
Datasheet

Specifications of IDTCV146PVG

Input
Crystal
Output
Clock
Frequency - Max
400MHz
Voltage - Supply
3.135 V ~ 3.465 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
56-SSOP
Frequency-max
400MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
CV146PVG
FEATURES:
• One high precision PLL for CPU, with SSC and N program-
• One high precision PLL for SRC/PCI/SATA, SSC and N pro-
• One high precision PLL for 96MHz/48MHz
• Band-gap circuit for differential outputs
• Supports spread spectrum modulation, down spread 0.5%
• Supports SMBus block read/write, index read/write
• Selectable output strength for REF
• Allows for CPU frequency to change to a higher frequency for
• Enhanced capacitance on XTAL_IN and XTAL_OUT pins
• Available in SSOP package
KEY SPECIFICATIONS:
• CPU/SRC CLK cycle to cycle jitter < 85ps
• SATA CLK cycle to cycle jitter < 85ps
• PCI CLK cycle to cycle jitter < 250ps
FUNCTIONAL BLOCK DIAGRAM
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
COMMERCIAL TEMPERATURE RANGE
© 2005 Integrated Device Technology, Inc.
IDTCV146
PROGRAMMABLE FLEXPC™ CLOCK FOR P4 PROCESSOR
mable
grammable
maximum system computing power
V
TT_PWRGD
XTAL_OUT
XTAL_IN
FSA.B.C
SDATA
SCLK
#/PD
Controller
Osc Amp
SM Bus
Control
XTAL
Logic
PROGRAMMABLE FLEXPC™
CLOCK FOR P4 PROCESSOR
N Programmable
N Programmable
PLL3
PLL1
SSC
PLL2
SSC
1
DESCRIPTION:
support up to 400MHz processor. This chip has three PLLs inside for CPU/
SRC/PCI, SATA, and 48MHz/DOT96 IO clocks. One dedicated PLL for Serial
ATA clock provides high accuracy frequency. This device also implements
Band-gap referenced I
outputs, which can provide more robust system performance.
which allows for isolated changes instead of affecting other clock groups.
OUTPUTS:
• 2*0.7V current –mode differential CPU CLK pair
• 6*0.7V current –mode differential SRC CLK pair, one
• One CPU_ITP/SRC selectable CLK pair
• 6*PCI, two free running, 33.3MHz
• 1*96MHz, 1*48MHz
• 2*REF
IDTCV146 is a 56 pin clock device. The CPU output buffer is designed to
Each CPU/SRC/PCI, SATA clock has its own Spread Spectrum selection,
SATA_SRC pair
48MHz/96MHz
Output Buffers
Output Buffer
Output BUffer
Stop Logic
Stop Logic
SRC CLK
CPU CLK
I
I
REF
REF
REF
to reduce the impact of V
ITP_EN
COMMERCIAL TEMPERATURE RANGE
CPU_ITP/SRC6
PCI[5:0], PCIF[1:0]
SRC[5:0]
SATA_SRC
CPU[1:0]
REF[1:0]
48MHz
DOT96
DD
variation on differential
APRIL 2005
IDTCV146
DSC-6749/4

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IDTCV146PVG Summary of contents

Page 1

IDTCV146 PROGRAMMABLE FLEXPC™ CLOCK FOR P4 PROCESSOR FEATURES: • One high precision PLL for CPU, with SSC and N program- mable • One high precision PLL for SRC/PCI/SATA, SSC and N pro- grammable • One high precision PLL for 96MHz/48MHz ...

Page 2

IDTCV146 PROGRAMMABLE FLEXPC™ CLOCK FOR P4 PROCESSOR PIN CONFIGURATION PCI0 1 PCI1 _PCI DD GND_PCI 4 PCI2 5 6 PCI3 7 PCI4 8 PCI5 GND_PCI 9 V _PCI *TEST_SEL/PCIF0 ITP_EN/PCIF1 ...

Page 3

IDTCV146 PROGRAMMABLE FLEXPC™ CLOCK FOR P4 PROCESSOR PIN DESCRIPTION Pin Number Name 1 PCI0 2 PCI1 3 V _PCI _PCI SS 5 PCI2 6 PCI3 7 PCI4 8 PCI5 9 V _PCI _PCI DD ...

Page 4

IDTCV146 PROGRAMMABLE FLEXPC™ CLOCK FOR P4 PROCESSOR PIN DESCRIPTION (CONT.) Pin Number Name 43 CPUC1 44 CPUT1 45 V _CPU DD 46 CPUC0 47 CPUT0 48 V _CPU SS 49 SCL 50 SDA 51 XTAL_OUT 52 XTAL_IN 53 V _REF ...

Page 5

IDTCV146 PROGRAMMABLE FLEXPC™ CLOCK FOR P4 PROCESSOR CONTROL REGISTERS N PROGRAMMING PROCEDURE Use Index byte write. • For N programming, the user only needs to access Byte17, Byte 25, and Byte8. • 1. Write Byte17 for CPU PLL N, CPU ...

Page 6

IDTCV146 PROGRAMMABLE FLEXPC™ CLOCK FOR P4 PROCESSOR BYTE 0 Bit Output(s) Affected 7 CPUT2, CPUC2/ SRCT6, SRCC6 6 SRCT5, SRCC5 5 SRCT4, SRCC4 4 SRCT3, SRCC3 3 SATAT, SATAC 2 SRCT2, SRCC2 1 SRCT1, SRCC1 0 SRCT0, SRCC0 BYTE 1 ...

Page 7

IDTCV146 PROGRAMMABLE FLEXPC™ CLOCK FOR P4 PROCESSOR BYTE 4 Bit Output(s) Affected 7 Reserved 6 DOT96 5 PCIF1 4 PCIF0 3 Reserved 2 Reserved 1 Reserved 0 Reserved BYTE 5 Bit Output(s) Affected 7 Stopped SRC 6 Reserved 5 Reserved ...

Page 8

IDTCV146 PROGRAMMABLE FLEXPC™ CLOCK FOR P4 PROCESSOR BYTE 8 Bit Output(s) Affected 7 SRC SSC enable USB48 2 Reserve 1 0 One cycle read BYTE 9 Bit Output(s) Affected 7 6 CPU SMC2 5 CPU SMC1 ...

Page 9

IDTCV146 PROGRAMMABLE FLEXPC™ CLOCK FOR P4 PROCESSOR BYTE 25 Bit Output(s) Affected 7 SRC_N7, MSB 6 SRC_N6 5 SRC_N5 4 SRC_N4 3 SRC_N3 2 SRC_N2 1 SRC_N1 0 SRC_N0, LSB BYTES 26-31: OUTPUT WAVEFORM ADJUSTMENT. DON'T WRITE OVER. Description / ...

Page 10

IDTCV146 PROGRAMMABLE FLEXPC™ CLOCK FOR P4 PROCESSOR ELECTRICAL CHARACTERISTICS - INPUT / SUPPLY / COMMON OUTPUT PARAMETERS Following Conditions Apply Unless Otherwise Specified: Operating Condition 0°C to +70°C, Supply Voltage Symbol Parameter V Input HIGH Voltage ...

Page 11

IDTCV146 PROGRAMMABLE FLEXPC™ CLOCK FOR P4 PROCESSOR ELECTRICAL CHARACTERISTICS - CPU, SRC, AND DOT96 0.7 CURRENT MODE DIFFERENTIAL PAIR (1) Following Conditions Apply Unless Otherwise Specified: Operating Condition 0°C to +70°C, Supply Voltage Symbol Parameter Z ...

Page 12

IDTCV146 PROGRAMMABLE FLEXPC™ CLOCK FOR P4 PROCESSOR ELECTRICAL CHARACTERISTICS - CPU, SRC, AND DOT96 0.7 CURRENT MODE DIFFERENTIAL PAIR, CONTINUED Following Conditions Apply Unless Otherwise Specified: Operating Condition 0°C to +70°C, Supply Voltage Symbol Parameter (2) ...

Page 13

IDTCV146 PROGRAMMABLE FLEXPC™ CLOCK FOR P4 PROCESSOR ELECTRICAL CHARACTERISTICS, 48MHZ, USB Following Conditions Apply Unless Otherwise Specified: Operating Condition 0°C to +70°C, Supply Voltage Symbol Parameter (1,2) ppm Static Error (2) T Clock Period PERIOD V ...

Page 14

IDTCV146 PROGRAMMABLE FLEXPC™ CLOCK FOR P4 PROCESSOR PCI STOP FUNCTIONALITY If PCIF (2:0) and SRC clocks are set to be free-running through SMBus programming, they will ignore the PCI_STOP register bit. PCI_STOP CPU CPU# (Byte 6 bit 3) 1 Normal ...

Page 15

IDTCV146 PROGRAMMABLE FLEXPC™ CLOCK FOR P4 PROCESSOR PD DE-ASSERTION The time from the de-assertion until power supply ramps to get stable clocks will be less than 1.8ms. If the drive mode control bit for PD tristate is ...

Page 16

IDTCV146 PROGRAMMABLE FLEXPC™ CLOCK FOR P4 PROCESSOR ORDERING INFORMATION IDTCV XXX XX Device Type Package CORPORATE HEADQUARTERS 6024 Silver Creek Valley Road San Jose, CA 95138 X Grade Blank Commercial Temperature Range (0°C to +70°C) PV Small Shrink Outline Package ...

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