ABC Office MC-1, DC-2 manual Appendix F FPD Control Registers, Application Notes and Examples, Host

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

14 Appendix F FPD Control Registers

Control Reg 0	Bit
USER_MSG	0
REC_BLOCK_MSG	1
SYS_VOL_MSG	2
LOCKED_MSG	3
DIG_IN_NOLOCK_MSG	4
SPEAKER_ERR_MSG	5
LR_BALANCE_MSG	6
FB_BALANCE_MSG	7

Control Reg 1	Bit
SYS_MUTE_MSG	0
EQ_BASS_MSG	1
EQ_TREBLE_MSG	2
EQ_TILT_MSG	3
PGM_CHG_MSG	4
NOISE_ACTIVE_MSG	5
Z2_KEY_ERR_MSG	6
REC_SRC_ERR_MSG	7

Control Reg 2	Bit
Z2_VOLUME_MSG	0
Z2_BALANCE_MSG	1
Z2_MUTE_MSG	2
REC_SELECT_MSG	3
DIG_REC_ERR_MSG	4
BYPASS_ERR_MSG	5
MAIN_DISP_MSG	6
DTS_ERR_MSG	7

15 Application Notes and Examples

15.1 Box initializations:

15.1.1 DC-2/MC-1:

When the DC-2/MC-1 is powered on it will initialize the serial port and then transmit the DC_WAKEUP Packet, and look for an ACK from the HOST. Currently if an ACK is not received the DC-2/MC-1 continues to operate. This message is mostly for the HOST to know if the DC-2/MC-1 is in an operational state.

15.1.2 HOST:

When the HOST issues a HOST_WAKEUP Packet the DC-2/MC-1 responds with an ACK and then transmits the current FPD buffer with a DC_FPD notification. If the Host issues a HOST_WAKEUP command and does not receive the ACK it should assume it is not connected or the DC-2/MC-1 is not capable of responding on the rs-232 and therefore further serial communications will not be possible. If the DC-2/MC-1 RS232 is capable of communicating the DC-2/MC-1 will respond to a HOST_WAKEUP Command in any “On” state including standby.

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