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Numéro de référence | MK1491-06SLFTR | ||
Description | AMD Geode Clock Source | ||
Fabricant | Integrated Circuit Systems | ||
Logo | |||
1 Page
MK1491-06
AMD Geode™ Clock Source
Description
The MK1491-06 is a low-cost, low-jitter,
high-performance clock synthesizer for AMD’s
Geode-based computer and portable appliance
applications. Using patented analog Phased-Locked
Loop (PLL) techniques, the device accepts a 14.318
MHz crystal input to produce multiple output clocks. It
provides selectable PCI local bus and AC97 audio
clocks, 24 MHz and 48 MHz clocks for Super I/O and
USB, as well as multiple Reference outputs.
The device has multiple power-down modes to reduce
power consumption.
Block Diagram
Features
• Packaged in 28-pin SOIC or in 28-pin SSOP
• Available in Pb (lead) free
• Provides all critical timing for the AMD Geode
companion chip
• Four PCI clocks
• Selectable PCIF on up to 2 outputs
• Early PCI clock selectability
• Up to 4 Reference clocks
• 48 MHz USB and 24MHz SIO support
• AC97 audio clock
• Multiple power down modes
• Low EMI Enable pin reduces EMI radiation on PCI
clocks (patented)
• Operating voltage of 3.3 V ±5%
VDD
6
GND
5
PCI Frequency Select
Low EMI Enable
PCIF Function Enable
Early PCI Enable
SLOW#
PCISTP#
PWRDWN#
2
PCI
Clocks
3 PCI
EPCI/PCI
Audio Select
14.3M/24M Select
14.31818 MHz
crystal
XI
XO
Crystal
Oscillator
Audio
Clock
Fixed
Clocks
MUX
16.394 MHz or
24.576 MHz or
49.152 MHz
48 MHz
14.318 MHz or
24 MHz
3 14.318 MHz
MDS 1491-06 J
1
Revision 110204
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com
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Pages | Pages 10 | ||
Télécharger | [ MK1491-06SLFTR ] |
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