Advantech AIMB-221 manual System Memory, Memory Installation Procedures, Cache Memory

1.10System Memory

The AIMB-221 has two sockets for 200-pin dual inline memory modules (SODIMMs) in two memory channels.

All these sockets use 1.8 V unbuffered double data rate synchronous DRAMs (DDR SDRAM). They are available in capacities of 256, 512 1024 and 2048 MB. The sock- ets can be filled in any combination with DIMMs of any size, giving a total memory size between 256 MB and 4 GB.

1.10.1CPU FSB and memory speed

The AIMB-221 can accept DDR2 SDRAM memory chips without parity. Also note that the AIMB-221 accepts DDR2 533/667/800 MHz SDRAM. The AIMB-221 does not support ECC (error checking and correction).

1.11Memory Installation Procedures

To install DIMMs, first make sure the two handles of the DIMM socket are in the "open" position. i.e. The handles lean outward. Slowly slide the DIMM module along the plastic guides on both ends of the socket, and then press the DIMM module right down into the socket, until you hear a click. This is when the two handles have auto- matically locked the memory module into the correct position of the DIMM socket. To remove the memory module, just push both handles outward, and the memory mod- ule will be ejected by the mechanism in the socket.

1.12Cache Memory

The AIMB-221 supports a CPU with one of the following built-in full-speed L2 caches:

!1 MB for AMD Turion 64X2 TL-62 and TL56 CPUs,

!512 KB for Mobile AMD Sempron 3700 + CPUs, and

!256 KB for Mobile AMD Sempron 2100 + CPUs.

The built-in second-level cache in the processor yields much higher performance than conventional external cache memories.

1.13Processor Installation

Warning! Without a fan or heat sink, the CPU will overheat and cause damage to both the CPU and the single board computer. To install a CPU, first turn off your system.

The AIMB-221 is designed for AMD Mobile AMD TurionTM and Mobile AMD Sem- pronTM (Socket S1g1) up to 2.1 GHz. Follow these steps to install the processor:

1.Turn the screw to loosen the processor socket.

2.Align the triangular marking on the processor with the small arrow on the corner of the socket.

3.Turn the screw to its original position.

4.Install the heat sink on the CPU. The concave part of the heat sink should face the capacitors to avoid contact with the capacitors.

Chapter 1 Hardware Configuration

11 AIMB-221 User Manual