AR-B1380/AR-B1380A User’ s Guide
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1 Power LED+
2 Power LED-
3 Power LED-
Figure 3-17 J6: External Power LED Header
Note: J6 & JP6 are aligned with each other. Please be careful with their orientation and pin locations during installation.
(2) J4: HDD LED Header
J4 is used to connect to the external Hard Disk LED.
Figure 3-18 J4: HDD LED Header
(3) LED1: Power/Watchdog LED
The AR-B1380/AR-B1380A provides a rectangular LED indicator to indicate the status of the Power/
Watchdog timer. LED1 is located at the upper-left corner of the board above the SIMM socket.
3.3.14 DRAM Configuration
There is 2MB DRAM onboard. For memory expansion, a SOJ socket and 72-pin SIMM socket are provided.
The SIMM socket supports single-sided SIMM modules (Single-Line Memory Modules), which is designed
to accommodate 256Kx36 bit to 4Mx36-SIMMs. This provides the user with up to 32MB of main memory.
The 32-bit SIMM (without parity bit) also can be used on the AR-B1380/AR-B1380A board. There are six
on-board memory configurations available. Please refer to the following table for details:
SIMM
Total Memory
1Mx32 (x36)
4MB
4Mx32 (x36)
16MB
Table 3-14 DRAM Configuration
1 LED+
2 LED-
Summary of Contents for AR-B1380
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