TLC6C5748-Q1: TLC6C5748-Q1

有点不明白这个MC数据是怎样改变的？是指在改变电流时要写入两次吗？

Hi Chao,

YES.

BR, Gracie

你好，可以具体一点嘛，是在写入MC数据后，在这个后面再写入一次7bit的MC数据吗？

还有第一个问题请回答

Hi Chao,

Do you need Iout(max) to be 4.8mA? If so, you can set GS to be FFFF for each channel. MC ,DC value could be set as the MC, DC table.

Pls refer to Figure 8-3. Control Data Write Timing Diagram for DC, MC, BC, and FC:

MC data are updated when the same data are written twice with the write command data (96h). MCB2B to MCR0B data must be the same as MCB2A to MCR0A. You need to latch it twice.

BR, Gracie

是在第336bit后再写一次MC数据（9bit）吗？

Could you pls refer to this figure?

No. latch twice means another 769bit.

BR, Gracie

谢谢，我理解了。还有一点我不太明白，我们的灯板上有17个IC，GS数据和控制数据仅仅各发送了一次，大部分的LED都亮了起来，只有少数几个LED不亮，这是正常的现象吗？如果我想指定某个IC工作，让它控制的区域亮起来可以实现吗？

Of course only certain IC can work with your correct control and GS data.

BR, Gracie

不好意思，我不是很明白这是什么意思？是IC没有很好的接收到数据吗？

You need to set MC twice, doesn't it?

是要发送两次控制数据（769bit），一次GS数据（768bit）吗？也就是说灯板上IC的数量不管有多少，都是以这样的次数发送？

Hi Chao,

Usually control data is sent at the beginning for initialization. GS data is sent to change brightness. Yes. No matter the device number.

BR, Gracie

那如果我只想让第一个IC所控制的区域亮，该如何操作？

You can send target GS data to 1st device and send GS data =0 to other devices. 

BR, Gracie

为什么我调整PWM（GS)数据，改变的是LED的通断时间而不是亮度？

Of course changing the on-time during a duty cycle will change the brightness... That's how PWM dimming works...

GS数据就是PWM信号吗，PWM的频率设置为20KHZ为什么会闪的很快？

Hi Chao,

I hope you have read this AN which I recommend long time ago:https://www.ti.com/lit/pdf/slvafi8

GSCLK needs to be at least 10M and enable ESPWM to get PWM>=20kHz.

BR, Gracie

可以给个python的代码吗，我还是不太懂如何指定某个IC发送数据

Sorry. No. We don't have this support.

BR, Gracie