Advantech PCA-6194, Руководство пользователя

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13 Chapter 1
1.8.4 COM2 RS 232/422/485 mode selector (JSETCOM2)
Users can use JSETCOM2 to select among RS 232/422/485 modes for
COM2. The default setting is RS 232.
1.9 System Memory
The PCA-6194 has four sockets for 240-pin dual inline memory modules
(DIMMs) 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 sockets can be filled in any combination with
DIMMs of any size, giving a total memory size between 256 MB and 8
GB.
1.9.1 CPU FSB and memory speed
The PCA-6194 can accept DDR2 SDRAM memory chips without parity.
Also note: The PCA-6194 accepts DDR2 533/667/800 MHz SDRAM.
The PCA-6194 does NOT support ECC (error checking and correction).
1.10 Memory 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
Table 1.5: COM2 RS 232/422/485 mode selector
(JSETCOM2)
RS-232 * RS-422 RS-485
*default setting