User`s manual

Applilet EZ for HCD Controller
APPENDIX C DMX512 MODE COMMUNICATION DATA
R20UT0435EJ1200 Rev. 12.00 51
Jul 31, 2014
<2> Frame
One frame is configured of one start bit, eight data bits, and two stop bits.
One frame is equivalent to one UART communication data byte with a baud rate of 250 kbps, no parity, and two stop
bits.
1 data frame
MTBF
Start bit D D D D D D D D
Stop bits
Name Data width Level
Start bit 4  s Low-level
Data bits 4  s  8 bits Low-level/High-level
Stop bits 4  s  2 bits High-level
C.2 Communication Data Specification
 The frame data bits are LSB first.
 The start code is fixed to 0x00. Packets with a start code other than 0x00 are invalid.
 Brightness data corresponding to channels 1 to 4 on the board are set to each frame (0  brightness data  255).
 If the DMX status is assigned to a channel in the
 PD78F8024 that has a constant-current driver IC or an evaluation
board that uses a constant-current driver IC (EV-K0-HCD or EZ-0006), the following operations are performed
depending on the channel data.
If 0x80 is received when DMX communication is enabled, DMX communication is shut down.
If 0x00 is received when DMX communication is shut down, DMX communication is enabled.
Example of communication data (when the DMX status is assigned to channel 5)
BREAK MAB
MTBP
Channel 5
(Enable/
Shutdown:
0x00H/0x80H)
Channel 512
Channel 2
(brightness
level of CH2:
0x00H to 0xFFH)
Channel 1
(brightness
level of CH1:
0x00H to 0xFFH)
Start code
(fixed to 0x00H)
MTBP MTBP MTBP