| 摘要 |
The present invention provides a digital data interface device message format that describes command and response messages to be exchanged between a digital device having a system controller and a digital data interface device. The digital data interface device includes a message interpreter, content module and a control module. The digital data interface device may include an MDDI link controller. The digital data interface device can be used by a cellular telephone to control a peripheral device, such as a camera, bar code reader, image scanner, audio device or other sensor. The digital data interface device message format includes a transaction identification field, a count field, a command identification field and a status field. Optionally, the message format can include a data field. When an MDDI link is used, a digital data interface device message can be included in an MDDI register access packet.
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