Appendix F Fpd Control Registers; Application Notes And Examples; Box Initializations; Dc-2/Mc-1 - Lexicon DC-2 Protocol Manual

Lexicon, Inc.
DC-2/MC-1 Serial Communications Protocol

14 Appendix F FPD Control Registers

Control Reg 0
USER_MSG
REC_BLOCK_MSG
SYS_VOL_MSG
LOCKED_MSG
DIG_IN_NOLOCK_MSG
SPEAKER_ERR_MSG
LR_BALANCE_MSG
FB_BALANCE_MSG
Control Reg 1
SYS_MUTE_MSG
EQ_BASS_MSG
EQ_TREBLE_MSG
EQ_TILT_MSG
PGM_CHG_MSG
NOISE_ACTIVE_MSG
Z2_KEY_ERR_MSG
REC_SRC_ERR_MSG
Control Reg 2
Z2_VOLUME_MSG
Z2_BALANCE_MSG
Z2_MUTE_MSG
REC_SELECT_MSG
DIG_REC_ERR_MSG
BYPASS_ERR_MSG
MAIN_DISP_MSG
DTS_ERR_MSG

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.
Bit
0
1
2
3
4
5
6
7
Bit
0
1
2
3
4
5
6
7
Bit
0
1
2
3
4
5
6
7
Printed on: 10/19/00
40 of 44