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6VM7/6VM7A
GD: Green LED
1
PIN 1 : LED anode (+)
PIN 2 : LED cathode (
3.4. DRAM INSTALLATION
The main board can be installed with 16 / 32 / 64 / 128MB and 256 MB
(128Mb technology) 168 pins DIMM module DRAM, and the DRAM speed
must be 67~100 MHz for SDRAM when system bus speed is set to 66MHz.
When system bus speed is set to 100MHz, 100MHz SDRAM is required. The
DRAM memory system on main board consists of bank 0 and bank 1.
Since 168 pins DIMM module is 64 bits width, therefore 1 piece of DIMM
module may match a 64 bits system. The total memory size is 16 MB ~
512MB SDRAM . The DRAM installation position refer to Figure 3.1, and
notice the Pin 1 of DIMM module must match with the Pin 1 of DIMM socket.
Insert the DIMM module into the DIMM socket at Vertical angle. If there is a
wrong direction of Pin 1, the SDRAM DIMM module could not be inserted
into socket completely.
3.5. CPU SPEED SETUP
The system bus frequency can be switched between 66MHz and 133MHz by
adjusting DIP SW2. The CPU frequency ratio can be switched from X3 to
X9.5 by adjusting DIP SW1. The user can set up CPU speed for
366~533MHz processors by adjusting SW1 and SW2 properly.
SW1: (O:ON / X:OFF)
FREQ. RATIO
X 3
X 3.5
X 4
X 4.5
X 5
X 5.5
X 6
X 6.5
−
)
DIP SWITCH (SW)
1
2
3
O
X
O
X
X
O
O
O
X
X
O
X
O
X
X
X
X
X
O
O
O
X
O
O
3-6
4
O
O
O
O
O
O
X
X
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