The device implements two kinds of transmission formats, which are called broadcast and non-broadcast. With broadcast way, the devices which are cascaded in a data chain receive the same data from the controller as Data Write Command with Broadcast shows. With non-broadcast way, each device will receive its own data sent from controller. The order of the data is the reverse of the order in which the device cascades as shown in Data Write Command with Non-Broadcast.

For 48-bits RGB data, the Blue data is the first to be transmitted, then are the Green and the Red. Also, for all bits in one frame, it is always the MSB transmitted first and the LSB transmitted last.

Here is the data write command with broadcast way. The devices copy to the internal registers after receiving the data. Generally, it is used to write FC0-FC11 command and read LOD/LSD command.

Figure 8-17 Data Write Command With Broadcast

Figure 8-18 shows the timing diagram of the data write command with broadcast.

Figure 8-18 Data Write Command With Broadcast (Timing Diagram)

Here is the data write command with non-broadcast way. When the first device recognizes End_bytes, it cuts off the last 51-bit (3×17-bit) data before End_bytes, and the left are shifted out from SOUT to the second device; likewise, when the last device recognizes End_bytes from the former device, it cuts off the last 51-bit (3 × 17-bit) data before End_bytes and the left are shifted out from SOUT. Generally, it is used for write SRAM command (WRTGS), details about how to write a frame data into memory bank can be found in Write a Frame Data into Memory Book.

Figure 8-19 Data Write Command With Non-Broadcast

Figure 8-20 shows the timing diagram of the Data Write Command with Non-Broadcast.

Figure 8-20 Data Write Command with Non-Broadcast (Timing Diagram)