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Hardware Setup SY-5EHM/5EH5 V1.0
21
Step 5. Set JP7,JP9,JP10 for SDRAM frequency
JP7 is used to indicate the frequency of the CPU bus clock to the
ETEQ chipset.
JP9 and JP10 are used to determine that the SDRAM is running at
the frequency of the CPU bus clock or the AGP clock.
CPU BUS
Clock
AGP BUS
Clock
JP10 JP7 JP9 SDRAM Clock
66MHz
66MHz
1-2
2-3
2-3
66MHz
75MHz
75MHz
1-2
2-3
2-3
75MHz
2-3
1-2
1-2
55MHz
83MHz 55MHz
1-2
1-2
2-3
83MHz
2-3
1-2
1-2
63.4MHz
95MHz 63.4MHz
1-2
1-2
2-3
95MHz
2-3
1-2
1-2
66MHz
100MHz 66MHz
1-2
1-2
2-3
100MHz
2-3
1-2
1-2
75MHz
112MHz 75MHz
1-2
1-2
2-3
112MHz
2-3
1-2
1-2
82.6MHz
124MHz 82.6MHz
1-2
1-2
2-3
124MHz
Note: Use 8ns or faster SDRAM modules (PC100 compliant) when
SDRAM is set to run at the frequency of 95/100 MHz.