Half Size All-In-One 386SX CPU CARD User’ s Guide
AR-B1375/AR-B1376 Half Size All-In-One 386SX CPU ... - Acrosser
AR-B1375/AR-B1376 Half Size All-In-One 386SX CPU ... - Acrosser
- No tags were found...
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
AR-B1375/AR-B1376 Users <strong>Guide</strong><br />
(2) External Battery Connector (J11)<br />
J11 allows users to connector an external 4.5 to 6 VDC battery to the AR-B1375 and AR-B1376 if the on-board<br />
battery is fully discharged. The SRAM disk will draw the battery current. The battery charger on AR-B1375 and<br />
AR-B1376 doesn’t source charge current to the external battery, which connects to J11.<br />
1 Battery+<br />
2 Battery-<br />
1 2<br />
Figure 3-23 J11: External Battery Connector<br />
3.2.12 <strong>CPU</strong> Base Clock Select (JP1)<br />
The <strong>CPU</strong> base clock (<strong>In</strong>put clock) is twice of its operation clock.<br />
2<br />
1<br />
4<br />
3<br />
2<br />
1<br />
4<br />
3<br />
2<br />
1<br />
4<br />
3<br />
50MHz 80MHz 66.67MHz<br />
Factory Preset<br />
Figure 3-24 JP1: <strong>CPU</strong> Base Clock Select<br />
3.2.13 DRAM Configuration<br />
There is two 32-bit memory banks on the AR-B1375/AR-B1376 board. It can only put one-side DRAM SIMM to<br />
SIMM Socket (Single-Line Memory Modules), which is designed to accommodate 256KX36 bit to 4MX36-SIMMs.<br />
This provides the user with up to 32MB of main memory. The 32-bit SIMM (without parity bit) also can be used on<br />
AR-B1375/AR-B1376 board. There are six on-board memory configurations available. Please refer to the<br />
following table for details:<br />
SIMM1 SIMM2 Total Memory<br />
256KX32 (X36) None 1MB<br />
256KX32 (X36) 256KX32 (X36) 2MB<br />
256KX32 (X36) 1MX32 (X36) 5MB<br />
256KX32 (X36) 4MX32 (X36) 17MB<br />
1MX32 (X36) None 4MB<br />
1MX32 (X36) 256KX32 (X36) 5MB<br />
1MX32 (X36) 1MX32 (X36) 8MB<br />
1MX32 (X36) 4MX32 (X36) 20MB<br />
4MX32 (X36) None 16MB<br />
4MX32 (X36) 256KX32 (X36) 17MB<br />
4MX32 (X36) 1MX32 (X36) 20MB<br />
4MX32 (X36) 4MX32 (X36) 32MB<br />
Table 3-3 DRAM Configuration<br />
3-10