ABC Office MC-1 Sleep Notification, Front Panel Display Buffer, Host Response Expected, Dcfpd

Lexicon, Inc.
DC-2/MC-1 Serial Communications Protocol	Printed on: 10/19/00

7.1.1.2 Host Response Expected

Following the transmission of the Wakeup notification DC-2/MC-1 will wait for an ACK. 7.1.1.2.1 Actions to Response Codes

ACK	DC-2/MC-1 continues to operate.
NAK Error Code	DC-2/MC-1 will retransmit the Wakeup Notification until it receives an ACK
	or it reaches the RETRANSMIT_COUNT. If the RETRANSMIT_COUNT
	is exceeded then DC-2/MC-1 continues to operate.

7.1.2 Sleep Notification

By transmitting the Sleep Notification, DC-2/MC-1 indicates the unit is shutting down into a standby mode. Because the hard power switch could be activated independently of the DC-2/MC-1 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 DC-2/MC-1.

7.1.2.1 Notification Packet Description

Application Header:

Command DC_SLEEP 0x02

Data Count 00x00

Application Data:

N/A

7.1.3 Front Panel Display Buffer

DC-2/MC-1 will transmit the front panel display buffer following the update to the DC-2/MC-1 front panel display. The DC-2/MC-1 front panel display is 2 X 20 ASCII character display. The HOST can control the operation of this notification message by FPD internal control registers. Individual notifications can be enabled or disabled and the minimum transmit interval can be adjusted. Transmission of the display buffer is asynchronous to other host/DC-2/MC-1 communication and will only transmit following the completion of any communication exchanges in progress or pending. The FPD control register command packets are described in section 7.3.14 Get FPD Control Registers.

7.1.3.1 Notification Packet Description

Application Header:

Command	DC_FPD	0x03
Data Count	42	0x2A
Application Data:
Data[0] - Data[21]	Line1	ch ch ch… 0x00
Data[22] - Data[42]	Line2	ch ch ch … 0x00

7.1.3.2 Data Description

Line1
Data Type:	Null(0x00) terminated ASCII character string.
Max Length:	DISP_LINE_LENGTH defined in Appendix E Protocol Constants.
Line2
Data Type:	Null(0x00) terminated ASCII character string.
Max Length:	DISP_LINE_LENGTH defined in Appendix E Protocol Constants.

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