Aaeon SBC-656, Руководство пользователя

Страница: 26 / 103

Chapter 2 Installation 17
Installing SDRAM (DIMMs)
S y s t e m M e m o r y
The upper edge of the SBC-656 contains one sockets for 168 pins
dual inline memory module (DIMM). The socket uses 3.3 V
unbuffered synchronous (SDRAM). DIMM is available in capaci-
ties of 16, 32, 64, 128, or 256 MB. The socket can be filled in the
DIMM of any size, giving your SBC-656 single board computer
between 16 and 256 MB of memory.
Memory Installation Procedures
To install DIMM, first make sure the two handles of the DIMM
socket are in the "open" position. i.e. The handles remain outward.
Slowly slide the DIMM module along the plastic guides on both
ends of the socket. Then press the DIMM module right down into
the socket, until you hear a click. This is when the two handles
have automatically locked the memory module into the correct
position of the DIMM socket. (See Figure below) To take away the
memory module, just push both handles outward, and the memory
module will be ejected by the mechanism in the socket.
Cache memory
Since the second level cache has been embedded into the Celeron
CPU, you do not have to take care of either SRAM chips or SRAM
modules. The built-in second level cache in the Celeron yields
much higher performance than the external cache memories. The
cache size in the Celeron CPU is either 128 KB.