Datavideo HDR-200 User Manual page 28

7. Return Data
10h 01h:ACK
When a command from the CONTROLLER is received normally, the DEVICE returns this
command as acknowledgment.
1h 12h:NAK
When a communication error is detected or an undefined COMMAND is received, the
DEVICE returns this command as not-acknowledgment.
BIT-7 to BIT-0 of DATA-1 will be set in accordance with the contents.
[DATA-1]
BIT-6
BIT-7
FRAMING
ERROR
TIME OUT
2h 11h : DEVICE TYTPE
The "00h 11h : DEVICE TYPE REQUEST" command is used for asking the specifications
of the HDR-200 used as DEVICE. When the DEVICE receives this command, it attaches 2-
bytes specification data to "12h 11h : DEVICE TYPE" and sends the information to the
CONTROLLER.
HDR-200:
74h 04h : Current Time Code return (BCD)
Bit 7
Data 0 0
Data 1 0
Data 2 0
Data 3 0
Send: 61h 0Ch 01h 6Eh
Return: 74h 04h 01h 02h 03h 04h 82h (Time code 04:03:02:01)
F4h 01h : Current Track Length (BCD)
Bit 7
Data 0 0
Data 1 0
Data 2 0
Data 3
Send: E0h 01h E1h
Return: F4h 01h 29h 41h 56h 00h B5h (Track Length 00:56:41:29)
BIT-5
BIT-4
OVERRUN PARITY
ERROR ERROR
12h 11h B0h 01h
Bit 6 Bit 5
0 Tens of Frames
Tens of Seconds
Tens of Minutes
0 Tens of Hours
Bit 6 Bit 5
0 Tens of Frames
Tens of Seconds
Tens of Minutes
Tens of Hours
BIT-1
BIT-3 BIT-2
CHECKSUM SOFTWARE
ERROR OVERRUN
Bit 4 Bit 3
Bit 4 Bit 3
27
BIT-0
UNDEFINED
COMMAND
Bit 2 Bit 1
Frames
Seconds
Minutes
Hours
Bit 2 Bit 1
Frames
Seconds
Minutes
Hours
Bit 0
Bit 0