Denon DCM-390 User manual

Revision1.30 DCM390 Serial Interface Specification
Date 25.Apr.’06 1 page of 40
D&M
Specification
For
Serial Interface DCM-390
D&M Holdings Inc.
DENON Brand Company

Revision1.30 DCM390 Serial Interface Specification
Date 25.Apr.’06 2 page of 40
D&M
Contents
1Serial communication interface............................................................................................................. 3
1.1 Physical interface..................................................................................................................... 3
1.2 Transfer format of serial data ................................................................................................. 4
2Command format and answer format..................................................................................................... 5
2.1 Protocol for data transmission and reception......................................................................... 6
Basic procedure ............................................................................................................................... 6
Communication errors .................................................................................................................... 6
2.2 Command / Answer sequence .................................................................................................. 7
2.3 List of command codes........................................................................................................... 11
2.4 List of answer codes............................................................................................................... 11
2.5 Status List.............................................................................................................................. 12
2.6 Command specification.......................................................................................................... 13
2.6.1 RESET command ................................................................................................................. 13
2.6.2REQUEST PLAY STATUS command................................................................................... 14
2.6.3 REQUEST CPU Version command ..................................................................................... 16
2.6.4 REQUEST ERROR CODE command.................................................................................. 17
2.6.5 Request Disc status.............................................................................................................. 18
2.6.6 Request Program Table command....................................................................................... 19
2.6.7 REQUEST CD TOC command ............................................................................................ 21
2.6.8 REQUEST TEXT DATA command...................................................................................... 23
2.6.9 PLAY command .................................................................................................................... 25
2.6.8 STOP command.................................................................................................................... 26
2.6.9 CD PAUSE command........................................................................................................... 27
2.6.10 Skip command .................................................................................................................... 28
2.6.11 SEARCH command ............................................................................................................ 29
2.6.12 Open / Close Command...................................................................................................... 30
2.6.13 Program / Direct command................................................................................................ 31
2.6.14 Track Num Entry command .............................................................................................. 32
2.6.15 RANDOM command........................................................................................................... 33
2.6.16 A-B command ..................................................................................................................... 34
2.6.17 Time command ................................................................................................................... 35
2.6.18 Repeat command ................................................................................................................ 36
2.6.19 Disc Select .......................................................................................................................... 37
2.6.20 Disc skip command ............................................................................................................ 38
2.6.21 Power ON command....................................................................................................... 4038
2.6.22 Power OFF command......................................................................................................... 41

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1Serial communication interface
1.1 Physical interface
a) DCM280 has pin Dsub female connector for serial interface.
b) Table 1 indicates pin assignment of connector signals.
RS-232C
Terminal # Signal I/O
1 NC -
2 TxD O
3 RxD I
4 NC -
5 S.GROUND -
6 NC -
7 NC -
8 NC -
9 NC -
Table 1. Pin Assignment
c) Figure 1 indicates diagram of RS232C and RS422A.
RS-232C
Figure 1. Serial Driver/Receiver
CPU TXD
RXD

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1.2 Transfer format of serial data
-
Interface RS-232C
- Communication system Half-duplex communication
- Data transfer mode Start stop synchronization
- Transfer rate 9,600bps
- Start bit (ST) 1 bit
- Data bit (b0-b7) 8 bits
- Parity (P) Even number
- Stop bit (SP) 1 bit
- Transfer data ASCII code
- Control characters STX (0x02)
ETX (0x03)
NAK (15h)
ACK(06h)
ST b0 b1 b2 b3 b4 b5 b6 b7 P ST
Figure 2. Command Data Array
11/9600 sec

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2Command format and answer format
The DCM380X uses commands each of which consists of a data row (some commands no need PC) composed of
command codes (CC) and parameter codes (PC). The host shall be designed to send block check characters (BCC)
following ETX, with the data row enclosed in STX (text start: 0x02) and ETX (text termination: 0x03). The DCM380X
shall complete command receive with correct BCC codes.
Here are the formats.
Commands <STX> <CC> <PC0> <PC1> <PC2> <………..> <PCn> <ETX> <BCCH><BCCL>
STX (Start of TeXt) 0x02
CC (Command Code) Command code
PC (Parameter Code) Number of parameters is defined for each command.
ETX (End of Text) 0x03
BCC (Block Check Character) CC + PC0 + PC1 + PC2 + + PCn + ETX = XY (hex)
EachofXandYis4bitlong,X,Y=0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F
BCCH is an ASCII code converted from X (higher 4 bits of sum) and BCCL is converted from Y (lower 4 bit of sum).
BCCH and BCCL are ASCII coded data.
Answers <STX> <CC> <AC> <PC0> <PC1> <PC2> <> <PCn> <ETX><BCCH><BCCL>
STX (Start of TeXt) 0x02
RC (Reply Code) Reply code (=Command code)
AC (Answer Code) Answer code
PC (Parameter Code) Number of parameters is defined for each command.
ETX (End of TeXt) 0x03
BCC (Block Check Character) CC + PC0 + PC1 + PC2 + + PCn + ETX = XY (hex)
EachofXandYis4bitlong,X,Y=0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F
BCCH is an ASCII code converted from X (higher 4 bits of sum) and BCCL is converted from Y (lower 4 bit of sum).
BCCH and BCCL are ASCII coded data.

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2.1 Protocol for data transmission and reception
This unit is based on half-duplex communication. The unit shall therefore transmit commands and
receive answers according to the following procedure.
Basic procedure
1) The host shall select commands for this unit and transmit them to this unit. Command interval time
is MIN 40µsec.
2) Having issued a command, the host shall receive an answer from this unit, and then issue the next
command.
3) The host shall analyze the RC, AC, and PC as answers given and decide whether the command has
been normally executed.
4) The host shall give an answer to a command that gives operational instructions, then issue a status
request command, and decide whether this unit has finished operating with regard to the command
that gives operational instructions.
5) The time from the start of command transmission to the end of command transmission should be
max 40 msec.
6) The time from the completion of command transmission to the start of answerback is MAX.5sec.
7) This unit cannot receive any commands for about 5 seconds after the power switch is turned on.
Communication errors
1) Having received a command, which results in a communication error (overrun, framing, or
parity error), this unit shall give NAK (15h). (MAX 80ms from the start of command
transmission)
2) If the host has received NAK from this unit, it shall retransmit the command that it has transmitted
immediately beforehand.
3) Having received an answer, which results in a communication error (overrun, framing, or parity
error), the host shall respond with NAK.
4) If it has received NAK from the host, this unit shall retransmit the answer it has transmitted
immediately beforehand. (MAX 40ms)
5) When there is no answer from the unit within 6s, the host shall retransmit the command.

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2.2 Command / Answer sequence
Shown below are the command sequence and the answer sequence of this unit.
1) When a command is normally received by [unit] and an answer is normally received by [host] with an
answer parameter
Command Transmitted
CC
PC0
PC1
PC2
PCn
BCC
STX
ETX
STX
CC
PC0
STX
Answer Transmitted
Error Check OK
Next Command
Transmitted
HOST UNIT
AC
PC0
PC1
PCn
ETX
BCC
RC
Error Check OK
MAX
40ms
MIN
40µs
MAX
5s

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2) When a command is abnormally received (with or without an answer parameter)
Command Transmitted
CC
PC0
PC1
PC2
PCn
BCC
STX
ETX
NAK
CC
PC0
STX
NAK return
Error Check NG
Command Retransmitted
HOST UNIT
MAX
40ms
MAX

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3) When a command with an answer parameter is normally received by [unit] and an answer is abnormally
received by [host].
Com
mand Transmitted
CC
PC0
PC1
PC2
PCn
BCC
STX
ETX
STX
NAK
Answer Transmitted
Error Check OK
HOST UNIT
AC
PC0
PC1
PCn
ETX
BCC
RC
STX
Answer
Retransmitted
AC
PC0
PC1
RC
Error Check NG
MAX
40ms
MAX
6
0ms
MAX
5
s

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3) When a command with an answer parameter is normally received by [unit] and an answer is normally
received with ETB [host].
Command Transmitted
CC
PC0
PC1
PC2
PCn
BCC
STX
ETX
STX
ACK
Answer Transmitted
Error Check OK
HOST UNIT
AC
PC0
PC1
PCn
ETB
BCC
RC
STX
Continuous Answer
Transmitted
AC
PC0
PC1
RC
Error Check OK
MAX
40ms
PCn
ETX
BCC
MAX
40ms
Next command transmitted
MAX
5s
MAX
5s

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2.3 List of command codes
Following table is command code list.
3Xh:Command related to the acquisition of player information (such as status and name)
4Xh~5Xh:Operation instruction command to the player
No. Command Code(ASCII) Operation
1 Reset 0x20(‘SP’) Reset the device.
2 Request PLAY Status 0x30(‘0’) Request CD player status.
3 Request CPU Version 0x31(‘1’) Request the CPU revision code.
4 Request Error Code 0x32(‘2’) Request the error code.
5 Request Disc Status 0x33(‘3’) Disk number information is obtained.
6 Request Program Table 0x34(‘4’) Request Program Num Table.
7 Request CD TOC 0x35(‘5’) Request CD’s TOC data
8 Request TEXT Data 0x36(‘6’) Request CD/MP3/WMA-Text data
9 Play 0x40(‘@’) Start playback or recording.
10 Stop 0x41(‘A’) Stop playback or recording.
11 Pause 0x42(‘B’) Playback Pause.
12 Skip 0x43(‘C’) Skip to the other track.
13 Search 0x44(‘D’) Search with audible.
14 Open/Close 0x45(‘E’) Disc tray Open/Close
15 Program / Direct 0x46(‘F’) Select Program or Direct mode.
16 Track Num Entry 0x47(‘G’) Select the music track (search or program).
17 Random 0x48(‘H’) Random play back
18 A-B 0x49(‘I’) Assignment A and B point.
19 Time 0x4A(‘J’)
20 Repeat 0x4B(‘K’) Repeat 1track/1disc/all disc.
21 Disc Select 0x4C(‘L’) Disc search.
22 Disc Skip 0x4D(‘M’) Skip to another Disc.
23 Power ON 0x4E(‘N’) Power ON from the Stand-by status
24 Power OFF 0x4F(‘O’) Power OFF
Table 2. Command list
2.4 List of answer codes
No. Status Code (ASCII) Description
1 Command OK 0x20(SP) Received the command correctly.
2 Invalid 0x30(‘0’) Received invalid command or parameter.
3 Format Error 0x31(‘1’) Received inappropriate format command.
4 None track requested 0x32(‘2’) Requested track does not exit.
5 None time requested 0x33(‘3’) Requested time does not exit.
6 Condition Error 0x34(‘4’) Condition error occurs.
7 None Disc requested 0x35(‘5’) Requested disc does not exit.
Table 3. Answer code list

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2.5 Status List
Following table is a list of answer code types.
3Xh:Status of the entire system
4Xh:Status of each action
DescriptionNo. Status Code
(ASCII)
1 Ready 0x30 (‘0’) Device is ready to receive a command.
2 Not Ready 0x31 (‘1’) Device is not ready to be operated.
3 Disc Loading 0x32 (‘2’) Under disc loading.
4 Disc Loading Complete 0x33 (‘3’) Disc Loading complete.
5 Tray Opening 0x34 (‘4’) Disc tray open.
6 Tray Closing 0x35 (‘5’) Disc tray close.
7 Carousel rotating 0x36 (‘6’) Carousel in drawer rotating
8 Play 0x41 (‘A’) Playing.
9 Stop 0x42 (‘B’) Under stop.
10 Pause 0x43 (‘C’) Pausing CD.
11 No Disc 0x44 (‘D’) There is no CD in the device.
12 CD Error 0x45 (‘E’) CD Error.
13 Search 0x46 (‘F’) Fast play, forward or reverse direction.
14 Disc Read Error 0x47 (‘G’) Disc Read Error.
15 Stand-by 0x48(‘H’) Stand-by
Table 4. Status list

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2.6 Command specification
2.6.1 RESET command
This command resets the device. After RESET command the device will do some operations for reset
and return Answer code. At last the device resets itself.
1) Command format
Byte/bit 7 6 5 4 3 2 1 0
0 STX (0x02)
1 Command code (‘SP’)
2 Reserve (0x00)
3 Reserve (0x00)
4 Reserve (0x00)
5 Reserve (0x00)
6 ETX (0x03)
7 BCCH (high-level)
8 BCCL (low-level)
Table 5. Reset command
2) Answer format
Byte/bit 7 6 5 4 3 2 1 0
0 STX (0x02)
1 Reply code (‘SP’)
2 Answer code (Table 3)
3 ETX (0x03)
4 BCCH (high-level)
5 BCCL (low-level)
Table 6. Reset answer
3) Special condition

This device cannot receive any commands within 2 seconds after this command is sent.

After Reset command, the host shall wait the device becomes ready status. The device returns not Ready
status for Request Status command before get ready.

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2.6.2REQUEST PLAY STATUS command
Using this command, the host can get CD player information. The host shall send this command repeatedly to
sense the CD player’s status.
1) Command format
Byte/bit 7 6 5 4 3 2 1 0
0 STX (0x02)
1 Command code (‘0’)
2 CD Time Code (Elapsed: ‘0’, Remain: ‘1’, Total Remain: ‘2’)
3 Reserve (0x00)
4 Reserve (0x00)
5 Reserve (0x00)
6 ETX (0x03)
7 BCCH (high-level)
8 BCCL (low-level)
Table7. Request CD Status command
2) Answer format
Byte/bit 7 6 5 4 3 2 1 0
0 STX (0x02))
1 Reply code (‘0’)
2 Answer code (Table 3)
3 [System] System Status (Table 4)
4 Disc No. code (Table 9)
5 Disc type code (Table 10)
6 Audio format code (Table 11)
7 Status code (Table 4)
8 Play mode code (Table 12)
9 Folder number (100 digits)
10 Folder number (10 digits)
11 Folder number (1 digits)
12 Track number (100 digits)
13 Track number (10 digits)
14 Track number (1 digits)
15 Reserve (0x00)
16 Reserve (0x00)
17 Elapsed / Remain time (minutes, 100 digits)
18 Elapsed / Remain time (minutes, 10 digits)
19 Elapsed / Remain time (minutes, 1 digits)
20 Elapsed / Remain time (second, 10 digits)
21 Elapsed / Remain time (second, 1 digits)
22 ETX (0x03)
23 BCCH (high-level)
24 BCCL (low-level)
Table 8. Request CD Status answer

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Code Disc Number
0x31(‘1’) Disc1
0x32(‘2’) Disc2
0x33(‘3’) Disc3
0x34(‘4’) Disc4
0x35(‘5’) Disc5
Table 9. Disc No.code
Code Disc Type
0x31(‘1’) Reserved
0x32(‘2’) Reserved
0x33(‘3’) Reserved
0x34(‘4’) CD-DA
0x35(‘5’) CD-ROM
0x36(‘6’) Reserved
0x37(‘7’) Unknown
Table10.Disctypecode
Code Audio Format
0x31(‘1’) Reserved
0x32(‘2’) Reserved
0x33(‘3’) MP3
0x34(‘4’) LPCM
0x35(‘5’) Reserved
0x36(‘6’) WMA
Table 11. Audio format code
Ode Play mode
0x31(‘1’) Normal
0x32(‘2’) Program
0x33(‘3’) Normal Random
0x4(‘4’) Program Random
Table12.Playmode
3) Special conditions
- Until read the TOC, MP3/MWA file name, the device will return ‘0’ with track and time data.
- If time exceeds 999minutes 99seconds , return ‘-----’

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2.6.3 REQUEST CPU Version command
This command requests the microprocessor CPU firmware version code.
1) Command format
Byte/bit 7 6 5 4 3 2 1 0
0 STX (0x02)
1 Command code (‘1’)
2 Reserve (0x00)
3 Reserve (0x00)
4 Reserve (0x00)
5 Reserve (0x00)
6 ETX (0x03)
7 BCCH (high-level)
8 BCCL (low-level)
Table 13. Request Firmware Revision command
2) Answer format
Byte/bit 7 6 5 4 3 2 1 0
0 STX (0x02)
1 Reply code (‘1’)
2 Answer code (Table 3)
3 Firmware version 1000 digit (ASCII)
4 Firmware version 100 digit (ASCII)
5 Firmware version 10 digit (ASCII)
6 Firmware version 1 digit (ASCII)
7 ETX (0x03)
8 BCCH (high-level)
9 BCCL (low-level)
Table 14. Request Firmware Revision answer
3) Special condition
- None.

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2.6.4 REQUEST ERROR CODE command
With this command the host can get ERROR CODE from the device in case of something wrong.
1) Command format
Byte/bit 7 6 5 4 3 2 1 0
0 STX (0x02)
1 Command code (‘2’)
2 Reserve (0x00)
3 Reserve (0x00)
4 Reserve (0x00)
5 Reserve (0x00)
6 ETX (0x03)
7 BCCH (high-level)
8 BCCL (low-level)
Table 15. Request Error Code command
2) Answer format
Byte/bit 7 6 5 4 3 2 1 0
0 STX (0x02)
1 Reply code (‘2’)
2 Answer code (Table 3)
3 1st error code (Table 17)
4 2nd error code (Table 17)
5 ETX (03h)
6 BCCH (high-level)
7 BCCH (low-level)
Table 16. Request Error Code answer
Error code
No. 1st 2nd Detail
1 0x20 0x20 Loading error
2 0x21 0x21 Loading switch error
3 0x22 0x22 Focus servo error
4 0x23 0x23 Tracking servo error
5 0x24 0x24 Can't adjust FOCUS offset value for servo circuit
6 0x25 0x25 Can't adjust TRACKING offset value for servo circuit
7 0x26 0x26 Can’t adjust FOCUS gain value for servo circuit
8 0x27 0x27 Can’t adjust TRACKING gain value for servo circuit
9 0x28 0x28 Focusing failed in playing or searching or pausing
10 0x29 0x29 During spinup, data of disc does not read
11 0x2A 0x2A During play, data of disc does not read
12 0x2B 0x2B Cannot read within a preset time period in TOC reading.
13 0x2C 0x2C Sub code data does not read
12 0x2D 0x2D Command error occurs
13 0x2E 0x2E Focusing failed in scanning
Table 17. Request Error Code answer
3) Special condition
If error code is empty, using ‘00’.
- Error code is the following.
- After error occurs, it receives only “OPEN /CLOSE” KEY.

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2.6.5 Request Disc status
This obtains the information on the disk number reproduced now and each disk.
Byte/bit 7 6 5 4 3 2 1 0
0 STX (0x02h)
1 Command code (‘ 3’)
2 Reserve (0x00)
3 Reserve (0x00)
4 Reserve (0x00)
5 Reserve (0x00)
6 ETX (03h)
7 BCCH (high-level)
8 BCCH (low-level)
Table 18. Request Disc status Code command
Byte/bit 7 6 5 4 3 2 1 0
0 STX (0x02h)
1 Reply code (‘ 3’)
2 Answer code (Table 3)
3 Current disc number code (Table 20)
4 Disc1 type code (Table 21)
5 Disc2 type code (Table 21)
6 Disc3 type code (Table 21)
7 Disc4 type code (Table 21)
8 Disc5 type code (Table 21)
9 ETX (03h)
10 BCCH (high-level)
11 BCCH (low-level)
Table 19. Request Disc status Code answer
Code Disc Number
0x31(‘1’) Disc1
0x32(‘2’) Disc2
0x33(‘3’) Disc3
0x34(‘4’) Disc4
0x35(‘5’) Disc5
Table 20. Current disc number code
Code Disc Type
0x31(‘1’) Reserved
0x32(‘2’) Reserved
0x33(‘3’) Reserved
0x34(‘4’) CD-DA
0x35(‘5’) CD-ROM
0x36(‘6’) Reserved
0x37(‘7’) Unknown
0x38(‘7’) No Disc
Table 21. Disc type code

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2.6.6 Request Program Table command
This command acquires the information that is registered to program with unit.
1) Command format
Byte/bit 7 6 5 4 3 2 1 0
0 STX (0x02)
1 Command code (‘4’)
2 Program Table Num (‘0’ – ‘3’) (Table 23)
3 Reserve (0x00)
4 Reserve (0x00)
5 Reserve (0x00)
6 ETX (0x03)
7 BCCH (high-level)
8 BCCL (low-level)
Table 22. Call command
CODE Program / Direct Status
0x30 (‘0’) Program Num 01 – 10
0x31 (‘1’) Program Num 11 – 20
0x32 (‘2’) Program Num 21 – 30
0x33 (‘3’) Program Num 31 – 32
Table 23. Program / Direct answer
2) Answer format
Byte/bit 7 6 5 4 3 2 1 0
0 STX (0x02)
1 Reply code (‘4’)
2 Answer code (Table 3)
3 Program Table Num (‘0’ – ‘3’) (Table 23)
4 Program Num 1 Disc number (Table20)
5 Program Num 1 Track number 100 digits
6 Program Num 1 Track number 10 digits
7 Program Num 1 Track number 1 digits
8 Program Num 2 Disc number (Table20)
9 Program Num 2 Track number 100 digits
10 Program Num 2 Track number 10 digits
11 Program Num 2 Track number 1 digits
12 Program Num 3 Disc number (Table20)
13 Program Num 3 Track number 100 digits
14 Program Num 3 Track number 10 digits
15 Program Num 3 Track number 1 digits
16 Program Num 4 Disc number (Table20)
17 Program Num 4 Track number 100 digits
18 Program Num 4 Track number 10 digits
19 Program Num 4 Track number 1 digits
20 Program Num 5 Disc number (Table20)
21 Program Num 5 Track number 100 digits
22 Program Num 5 Track number 10 digits
23 Program Num 5 Track number 1 digits
24 Program Num 6 Disc number (Table20)
25 Program Num 6 Track number 100 digits

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26 Program Num 6 Track number 10 digits
27 Program Num 6 Track number 1 digits
28 Program Num 7 Disc number (Table20)
29 Program Num 7 Track number 100 digits
30 Program Num 7 Track number 10 digits
31 Program Num 7 Track number 1 digits
32 Program Num 8 Disc number (Table20)
33 Program Num 8 Track number 100 digits
34 Program Num 8 Track number 10 digits
35 Program Num 8 Track number 1 digits
36 Program Num 9 Disc number (Table20)
37 Program Num 9 Track number 100 digits
38 Program Num 9 Track number 10 digits
39 Program Num 9 Track number 1 digits
40 Program Num 10 Disc number (Table20)
41 Program Num 10 Track number 100 digits
42 Program Num 10 Track number 10 digits
43 Program Num 10 Track number 1 digits
44 ETX (0x03)
45 BCCH (high-level)
46 BCCL (low-level)
Table 24. Call answer
3) Special condition
-If Program Num empty then ‘000’.