Intel 815 - 3-DIMM Clocking; Table 29. Intel CK-815 (3-DIMM) Clocks

Clocking
R
Intel
®
815 Chipset Platform Design Guide 133
11.2 3-DIMM Clocking
Table 29 shows the characteristics of the clock generator for a 3-DIMM solution.
Table 29. Intel
®
CK-815 (3-DIMM) Clocks
Number Clock Frequency
2 processor clocks 66/100/133 MHz
13 SDRAM clocks 100 MHz
2 PCI clocks 33 MHz
1 APIC clocks 33 MHz
2 48 MHz clocks 48 MHz
3 3V, 66 MHz clocks 66 MHz
1 REF clock 14.31818 MHz
The following bullets list the features of the Intel CK-815 clock generator:
• Thirteen copies of SDRAM clocks
• Two copies of PCI clock
• One copy of APIC clock
• One copy of 48 MHz USB clock (3.3V) (non-SSC) (type 3 buffer)
• One copy of 48 MHz DOT clock (3.3V) (non-SSC) (see DOT details)
• Three copies of 3V, 66 MHz clock (3.3V)
• One copy of ref. clock @ 14.31818 MHz (3.3V)
• Ref. 14.31818 MHz xtal oscillator input
• Spread-spectrum support
• I
2
C support for turning off unused clocks
• 56-pin SSOP package
Figure 69 shows the Intel
®
815E chipset platform clock architecture for a 3-DIMM solution.