AMD DBAu1500 Development Board Supported Features
The following table shows the supported features in the board support package (BSP) for the hardware components on the AMD DBAu1500 Development Board for Au1500 processors.
| Hardware component | Hardware support | BSP support |
|---|---|---|
| RAM | 64 MB | Yes |
| Flash | 32 MB | Yes |
| Boot ROM | Yes | Yes |
| Timers | Yes | Yes |
| Real-time clock | No | Not applicable |
| VGA | PCI slot
Supported video cards: ATI Rage XL, 3Dlabs Permedia 3 |
Yes |
| LCD | No | Not applicable |
| Ethernet | Yes | Yes |
| Serial | 2 | Yes
Note One of the serial ports is for data only while the other has full support. |
| PCMCIA or CF | Yes | Yes |
| Mouse | Universal serial bus (USB) only | Yes |
| Keyboard | USB only | Yes |
| Hardware reset through a cold boot | Yes | Yes |
| Hardware reset through a warm boot | Yes | Yes |
| Software reset through a warm boot | Yes | Yes |
| Touch controller | No | Not applicable |
| USB host | Yes | Yes |
| USB function | Yes | No |
| Serial Infrared (SIR) | No | Not applicable |
| Fast Infrared (FIR) | No | Not applicable |
| Audio output | Yes | Yes |
| Audio input | Yes | Yes |
| Parallel for printing | No | Not applicable |
| Integrated Device Electronics (IDE) | Yes | No |
| Smart card | No | Not applicable |
| IEEE 1394 | No | Not applicable |
| Floppy disk | No | Not applicable |
| TV output | No | Not applicable |
| Floating point unit | No | Not applicable |
| Expansion connector | Yes | No |
| PCI slots | 1
Note This is for 3.3V PCI cards only. |
Yes
Note This slot is for VGA only. |
| Compact PCI or PCI extender | Yes | No |
| Logic analyzer probes | Yes | No |
| JTAG | Yes | Yes |
| Debug LEDs | Yes | Yes |
| Companion or add-on cards | No | Not applicable |
| Form factor | Custom | Not applicable |
BSP Limitations Related to AMD DBAu1500 Development Board Hardware Issues
The following list shows BSP limitations related to hardware issues on the AMD DBAu1500 Development Board.
- No support for USB function.
- No support for the IDE ATA/133 controller.
- The PCI bus does not fully support devices behind bridge. This issue is related to bus latency for transfers initialized by the Au1 PCI 2.2 Controller for PCI device behind bridge.
- The boot loader and KITL only support Au1 on-chip Ethernet controllers.
- Audio input uses the J17 connector or plug.
- Audio output uses the J20 connector or plug.
BSP Limitations Related to AMD DBAu1500 Silicon Issues
The following list shows BSP limitations related to silicon issues on the AMD DBAu1500 Development Board. For more information, see the AMD Web site.
The OAL sets the OD bit in the Config0 coprocessor register to fix or work around some silicon-related problems.
By default, the BSP builds with the OAL using coprocessor 0 count and compare registers for the system timer. In this mode, the device does not support the power-saving IDLE0/IDLE1 instruction in the OEMIdle function.
If you want to use the TOY counter as the system timer, you must set the DBAU1500_TOYTIMER environment variable. In this mode, the BSP or kernel using the TOY timer also uses the IDLE0 instruction to set the CPU to power save mode. However, the device does not support the high-resolution timer and profiling when in this mode.
If the DBAU1500_YAMON flag is set, the boot loader and the BSP are compiled and built in a way that allows you to flash the boot loader to address 0xBFD00000. In this mode, the YAMON autorun should be used to jump to the boot loader.
The USB host driver reads enable the register to work around the silicon problem twice.
A USB host controller silicon problem might cause some USB devices not to work or to work incorrectly. As a result, the memory can be corrupted and the USB device will randomly crash. This problem is typical for USB mouse devices that have a 4-byte interrupt endpoint size. This problem does not affect the Microsoft® IntelliMouse®.
The static mapping uses two translation look-aside buffer (TLB) entries to work around silicon problems with the page frame when the size is greater than 4 KB.
Due to a known silicon problem, the PCMCIA slot does not support 8-bit I/O operations on odd addresses. As a result, some PCMCIA cards — such as modem cards or Bluetooth cards — may not work or may work incorrectly.
See Also
How to Use the BSP for the AMD DBAu1500 Development Board | Setting up the AMD DBAu1500 Development Board Hardware
Last updated on Wednesday, April 13, 2005
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