Paso Sound PDVD01U - Manual (Page 32)


TASCAM DV-D01UT/C
RS-232C interface
This unit is equipped with an RS-232C port, capable of receiving commands and sending status information. The commands cover all
transport functions, menu functions and power on/standby.
Return status includes timer readouts, type of disc, and transport status. Additional commands are available to enable/disable the unit’s
front panel or IR controls.
RS-232C Specifications
9-pin D-Sub (Male)
Mode : Asynchronous
Data rate : 9600 bps
Command spacing : >25 ms
Note: For correct operation, wait at least 25ms after receiving the reply to a
command from the DV-D01U before sending the next command.
Character length : 8 bits
Parity bit : None
Stop bit : 1 bit
Transfer bit : LSBit First
1
6
5
9
Pin Signal Description Signal flow
2 RxD Receive data DVD player ß External device
3 TxD Transmit data DVD player ∑ External device
5 GND Signal grounding
Command
Command structure
Example: PLAY command
D
02h 3Eh 59h 46h 50h 63h 4Ch 57h 44h
> Y F W P c L
20h 20h 20h 20h 20h
SP SP SP SP SP
37h 31h 03h
7 1
Byte
Pr
eam
ble
Op
er
at
ion
Co
de
Cmn
d/
St
at
Par
am
et
er
C
od
es
Ch
ec
k
Su
m
En
d
By
te
Check Sum Range
1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th
Preamble
All command strings for this unit begin with the start byte “02h” and header byte “3Eh”.
Operation Code
Each command has a 3-byte operation code, which are listed in the following pages. The operation code for play is simply PLY (upper-
case letters).
Command/Status Byte
This section determines whether the command is telling the unit to do something, or asking for its status. A lowercase “c” (63h) indi-
cates a command while a lowercase “s” (73h) indicates status response.
Parameter Codes
8 bytes are reserved for parameters on the command/status response. When the status information does not fill up all 8 bytes (most
don’t), the extra slots are filled with spaces (20h). In the above example, FWD indicates playing forward at normal (1x) speed.
Check Sum
The check sum is calculated from the “>” in the Preamble to the end of the Parameter Codes. The last two digits of the hexadecimal
addition are shown as ASCII in the Check Sum area. In this example, the Check Sum is derived as follows:
3E + 50 + 4C + 59 + 63 + 46 + 57 + 44 + 20 + 20 + 20 + 20 + 20 = 317
The last two digits, “17” are displayed as ASCII in the Check Sum.
End Byte
This marks the end of the string with “03h”.
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