RS232 Protocol

11
Section 2: Feedback String Format
Standard Response String Format
Start Count ID Type Data Checksum
0xFE 0x31 0xA5 0x20 Char1 … Char42 Flag1 … Flag5 0xXX
The feedback string is a representation of the display of the unit. The Char1 - Char42
data bytes contain ASCII data representing the text that appears across the 2 lines of the
front display. It can contain source input, volume, and surround mode data and should
be parsed to obtain this information.
The Flag1 - Flag5 data bytes contain data on which of the various icons on the front
display are currently illuminated. The display status uses 2 bits in Flag3 to confirm if the
front display is On or Off.
Flag1 – Flag5 Data
Flag1 Flag2 Flag3 Flag4 Flag5
Bit0 A x Display Mode0 SB CBL
Bit1 5 II Display Mode1 Zone 4 CBR
Bit2 4 HDMI Zone 2 Zone 3 SW
Bit3 3 EX Standby LED < SR
Bit4 2 ES > SL
Bit5 1 dts 7.1 FR
Bit6 Coaxial Pro Logic 5.1 C
Bit7 Optical Dolby Digital Zone FL
Display Status
Display On Display Off
Display Mode 1 0 1
Display Mode 0 0 0
12V Trigger Status String Format
Start Count ID Type Data Checksum
0xFE 0x07 0xA5 0x21 Flag1 Flag2 Flag3 Flag4 Flag5 0xXX
12V Trigger Status Flag1 – Flag5 Data
Flag1: All Flag2: Main Flag3: Zone 2 Flag4: Zone 3 Flag5: Zone 4
Bit0 Trigger 1 Trigger 1 Trigger 1 Trigger 1 Trigger 1
Bit1 Trigger 2 Trigger 2 Trigger 2 Trigger 2 Trigger 2
Bit2 Trigger 3 Trigger 3 Trigger 3 Trigger 3 Trigger 3
Bit3 Trigger 4 Trigger 4 Trigger 4 Trigger 4 Trigger 4
Bit4 Trigger 5 Trigger 5 Trigger 5 Trigger 5 Trigger 5
Bit5 Trigger 6 Trigger 6 Trigger 6 Trigger 6 Trigger 6
Bit6
Bit7