GD3162 Daisy Chain

xingyun — Tue, 24 Mar 2026 05:49:09 GMT

Using the serial mode with the MCU to access 6 GD3162 devices, could you please explain how to configure the EB? Also, do I need to first set the working parameters using the registers, and then send and receive data? How should I send and receive data? I have read the official GD3162 sample code, but I don't understand how to use the daisy chain method to enable the MCU to communicate with the 6 driving peripherals.

Re: GD3162 Daisy Chain

JozefKozon — Tue, 24 Mar 2026 08:03:57 GMT

Dear Qian,

all six GD3162 devices share the same MOSI / MISO / SCLK / CSB. The devices are connected in series, forming one long shift register. Each GD3162 requires a 24‑bit frame. Please refer to the section 12. in the GD3162 full datasheet for the SPI interface description.

Please download the full GD3162 datasheet from the GD3162 product page, under the Secure section.

In the Figure 43. is shown SPI timing, from which required SPI mode can be deduced.

SPI mode	Clock polarity (CPOL)	Clock phase (CPHA)	Data is shifted out on	Data is sampled on
0	0	0	falling SCLK, and when SS activates	rising SCLK
1	0	1	rising SCLK	falling SCLK
2	1	0	rising SCLK, and when SS activates	falling SCLK
3	1	1	falling SCLK	rising SCLK

Figure 47. shows Daisy chain data transmission.

In the Table 34. are listed SPI registers.

Do I need to configure registers first?

[A] Yes. All GD3162 devices must receive their configuration via SPI before entering normal PWM operation.
If some devices need different settings, write to all first, then overwrite the ones that differ. Add 100us delay after each register write.

With Best Regards,

Jozef

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