6VX
3-5
GN: Green Function Switch
Open : Normal operation
Short : Entering Green Mode
GD: Green LED
PIN 1 : LED anode (+)
PIN 2 : LED cathode (
−
)
3.4. DRAM INSTALLATION
The main board can be installed with 16 / 32 / 64 / 128 / 256 MB 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, 1& bank 2.
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 ~ 768MB
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 DRAM
DIMM module into the DIMM socket at Vertical angle. If there is a wrong
direction of Pin 1, the DRAM DIMM module could not be inserted into socket
completely.
3.5. CPU SPEED SETUP
The system bus speed is selectable between 66~133 MHz. The user can select
the system bus speed (
JP2,JP3,JP4,JP5,JP6
) and change the DIP SWITCH
(SW)
selection to set up the CPU speed for 200 - 633MHz processor.
M
The CPU speed MUST match with the frequency RATIO. It will cause
system hanging up if the frequency RATIO is higher than that of CPU.
1
