Advantech PCA-6008G2, Руководство пользователя

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9 PCA-6008G2 User Manual
Chapter 1
H
ardware
C
onfiguration
recover from a software failure or an EMI problem. The J2 jumper settings control the
outcome of what the computer will do in the event the watchdog timer is tripped.
1.8.4 JSETCOM2 (RS232/422/485 Jumper Setting (JSETCOM2))
1.9 System Memory
The PCA-6008 has four sockets for 240-pin dual inline memory modules (DIMMs) in
two separate memory channels. It can operate with single channel or dual channel
modules. We recommend using dual channel mode to provide optimized perfor-
mance.
All these sockets use 1.8 V unbuffered double data rate synchronous DRAMs (DDRII
SDRAM). They are available in capacities of 256, 512 and 1024 MB. The sockets can
be filled in any combination with DIMMs of any size, giving a total memory size
between 256 MB and 2 GB.
Table 1.4: Watchdog timer output (JWDT1)
Function
Jumper Setting
IRQ11
* Reset
* default setting
Note!
The interrupt output of the watchdog timer is a low level signal. It will be held
low until the watchdog timer is reset
2
1-2 closed
2
2-3 closed
JSETCOM2
Note! System resources such as PCI require physical memory address loca-
tions that reduce available memory addresses above 3GB. This may
result in less than 4GB of memory being available to the operating sys-
tem and applications.