
COMMERCIALTEMPERATURERANGE
IDTCV110N
PROGRAMMABLEFLEXPCCLOCKFORP4PROCESSOR
1
MAY 2005
IDTCV110N
COMMERCIAL TEMPERATURE RANGE
PROGRAMMABLE FLEXPC
CLOCK FOR P4 PROCESSOR
XTAL
Osc Amp
SM Bus
Controller
Control
Logic
CPU CLK
Output Buffers
Stop Logic
X1
X2
SDATA
SCLK
VTT_PWRGD#/PD
FSA.B.C
IREF
CPU[1:0]
REF
CPU_ITP/SRC7
PLL1
SSC
N Programmable
ITP_EN
SRC CLK
Output Buffer
Stop Logic
48MHz/96MHz
Output BUffer
IREF
SRC[6:1]
48MHz
DOT96
PLL2
SSC
N Programmable
PLL3
PCI[5:0], PCIF[2:0]
The IDT logo is a registered trademark of Integrated Device Technology, Inc.
2005 Integrated Device Technology, Inc.
DSC-6755/3
FEATURES:
One high precision PLL for CPU, SSC, and N programming
One high precision PLL for SRC/PCI/SATA, SSC, and N
programming
One high precision PLL for 96MHz/48MHz
Band-gap circuit for differential outputs
Support spread spectrum modulation, down spread 0.5%
Support SMBus block read/write, index read/write
Selectable output strength for REF
Allows for CPU frequency to change to a higher frequency for
maximum system computing power
Available in SSOP package
FUNCTIONAL BLOCK DIAGRAM
DESCRIPTION:
IDTCV110Nisa56pinclockdevice,compliantwithIntelCK410specifications.
The CPU output buffer is designed to 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 IREF to reduce
theimpactofVDDvariationondifferentialoutputs,whichcanprovidemorerobust
systemperformance.
Each CPU/SRC/PCI, SATA clock has its own Spread Spectrum selection,
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 dedicated
for SATA
One CPU_ITP/SRC selectable CLK pair
9*PCI, 3 free running, 33.3MHz
1*96MHz, 1*48MHz
1*REF
KEY SPECIFICATIONS:
CPU/SRC CLK cycle to cycle jitter < 85ps
SATA CLK cycle to cycle jitter < 85ps
PCI CLK cycle to cycle jitter < 250ps