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MC-12 Serial Communications Protocol
7 Application Layer
7.1 MC-12 Asynchronous Notification Packets
MC-12 has been designed to transmit the asynchronous notification packets following these system
changes:
1. Power On
2. Entering Standby
3. Front Panel Display update
4. Parameter Value Changes.
The notification packets are defined as follows:
7.1.1 Wakeup Notification (MC-12, MC-1)
By transmitting the Wakeup Notification, MC-12 indicates the unit has just "powered on" or reset and is
ready to receive host commands. This notification is primarily for the HOST to know the status of the MC-
12.
7.1.1.1 Notification Packet Description
Application Header:
Command
Data Count
Application Data:
7.1.1.2 Host Response
The MC-12 does not expect any response from the HOST.
7.1.2 Sleep Notification (MC-12, MC-1)
By transmitting the Sleep Notification, MC-12 indicates the unit is shutting down into a standby mode.
Because the hard power switch could be activated independently of the MC-12 system software, hard power
down will not be notified. Acknowledgment of the Sleep Notification is not required. This notification is
primarily for the HOST to know the operating status of the MC-12.
7.1.2.1 Notification Packet Description
7.1.3 Front Panel Display (MC-12, MC-1)
MC-12 will transmit the front panel display buffer following the update to the MC-12 front panel display.
The MC-12 front panel display is 2 X 20 ASCII character display. The HOST can enable transmission of
this notification message by sending Host Wakeup (7.3.29). To disable transmission the HOST can send
Host Sleep (7.3.30). Transmission of the display buffer is asynchronous to other host/MC-12
© 2004 Harman Specialty Group All rights reserved.
DC_WAKEUP
0
N/A
Application Header:
Command
DC_SLEEP
Data Count
0
Application Data:
N/A
Printed on: 07/19/04
0x01
0x00
0x02
0x00
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