Hitachi US7750 HARP (Aspen) SDB Supported Features
The following table shows the supported features in the board support package (BSP) for the hardware components on the Hitachi US7750 HARP (Aspen) SDB for SH4 microprocessors.
| Hardware component | Hardware support | BSP support |
|---|---|---|
| RAM | 32 MB | RAM image |
| Flash | 32 MB Intel DA28F640J5 | Yes |
| Boot ROM | No | Not applicable |
| Timers | 3 | Yes |
| Real-time clock | Yes | Yes |
| VGA | MQ200 | MQ200 |
| LCD | Yes | Yes |
| Ethernet | SMC91c100 | Debug Ethernet card |
| Serial | 2 | Yes |
| PCMCIA or CF | 2 | Yes |
Mouse
Note The mouse wheel is not supported. |
PS/2 | Yes |
| Keyboard | PS/2 | Yes |
| Hardware reset through a cold boot | Yes | Yes |
| Hardware reset through a warm boot | Yes | Yes |
| Software reset through a warm boot | Not applicable | Yes |
| Touch controller | No | Not applicable |
| Universal serial bus (USB) host | 2 open host controller (OHC) interface | Human interface device (HID) |
| USB function | No | Not applicable |
| Serial Infrared (SIR) | Yes | Yes |
| Fast Infrared (FIR) | FIR header | Yes |
| Audio output | Yes | Yes |
| Audio input | Yes | Yes |
| Parallel for printing | 1 | Yes |
| Integrated Device Electronics (IDE) | No | No |
| Smart card | No | No |
| IEEE 1394 | No | No |
| Floppy disk | No | No |
| TV output | No | No |
| Floating point unit | Yes | Yes |
| Expansion connector | Proprietary, compact PCI | No |
| PCI slots | 0 | 0 |
| Compact PCI or PCI extender | HARP | No |
| Logic analyzer probes | Yes | Yes |
| JTAG | Yes | Yes |
| Debug LEDs | Yes | Yes |
| Companion or add-on cards | Tahoe HD64465 | Yes |
| Form factor | Custom | Not applicable |
Hitachi US7750 HARP (Aspen) SDB Hardware Restrictions and Limitations
If you are using the MQ200 display card, be sure that switch S1 on the MQ200 is set to the Down position or the MQ200 will not function correctly.
The PS/2 mouse has some known failures on the Hitachi Keywest (SH3) and Aspen (SH4) BSPs. To avoid this problem, use a USB mouse on these platforms. Because the Hitachi boards only support low-speed asynchronous communication, you can only use the USB mouse and keyboard to boot a Windows CE device.
The keyboard driver does not support keyboard status lights (CAPS LOCK, NUM LOCK, SCROLL LOCK) and hence these lights are disabled in the driver.
There is a known hardware limitation on the USB port on the Hitachi platforms. The on-board USB controller hardware on the Hitachi platforms restricts how much data can be presented to the controller at one time. This effectively limits the usable USB bandwidth and imposes limitations on the support for various types of USB devices on this platform. Given this limitation, Microsoft has done only limited testing of USB device on these Hitachi development platforms. If you need full support for all types of USB devices, you should consider using a PCI-bus extender and an external USB controller.
The PCI bus-mastering feature is not available on the Hitachi SH4 Aspen SDB. Consequently, it is impossible to test key multimedia features like DVD and Direct3D, which require the use of PCI devices on the SH4 Aspen SDB. The only available workaround is to use a different SDB from a third-party SDB manufacturer. Contact Hitachi for recommendations.
Note The SH3 Keywest SDB does not have the PCI bus-mastering problem. PCI devices have been tested on this SDB using a HARP cPCI extender cage, although interrupts are not routed to slots 1 and 4, so these slots cannot be used.
The audio driver on these development boards does not support full-duplex mode. To have a Communications Service (real-time communications) VoIP session, an OEM or an application developer should implement half-duplex communication support over the existing audio driver. Because the audio driver is not a low-latency driver, there will be delays in voice communication.
The onboard IrDA hardware on the Hitachi development boards supports Fast IR; however, because of performance problems with the IrDA driver, the throughput rate is significantly slower than the Fast IR transfer rate. There may also be some interoperability issues with standard serial IrDA.
In Windows CE .NET 4.2, when the BSP for the Hitachi US7750 HARP (Aspen) SDB is configured for a retail build of Enterprise Web Pad with Applications, the build runs slowly due to insufficient memory. To resolve this issue, update the Config.bib file to take advantage of the full 64 MB of RAM available in the Hitachi US7750 HARP (Aspen) SDB.
See Also
How to Use the BSP for the Hitachi US7750 HARP (Aspen) SDB | Setting Up the Hitachi US7750 HARP (Aspen) SDB Hardware
Last updated on Wednesday, April 13, 2005
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