3-Dimm Clocking; Table 33. Intel Ck-815 (3-Dimm) Clocks - Intel 815EG Design Manual

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12.2

3-DIMM Clocking

Table 33 shows the characteristics of the clock generator for a 3-DIMM solution.
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Table 33. Intel CK-815 (3-DIMM) Clocks
Number
2
13
2
1
2
3
1
The following bullets list the features of the CK-815 clock generator in a 3-DIMM solution:
• Thirteen copies of SDRAM clocks
• Two copies of PCI clock
• One copy of APIC clock
• One copy of 48 MHz USB clock (3.3 V) (non-SSC) (type 3 buffer)
• One copy of 48 MHz DOT clock (3.3 V) (non-SSC) (see DOT details)
• Three copies of 3 V, 66 MHz clock (3.3 V)
• One copy of ref. clock at 14.31818 MHz (3.3 V)
• Ref. 14.31818 MHz xtal oscillator input
• Spread-spectrum support
2
• I
C support for turning off unused clocks
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Intel 815EG Chipset Platform Design Guide
Clock Frequency
processor clocks 66/100/133 MHz
SDRAM clocks 100/133 MHz
PCI clocks 33 MHz
APIC clocks 33 MHz
48 MHz clocks 48 MHz
3 V, 66 MHz clocks 66 MHz
REF clock 14.31818 MHz
Clocking
155