US 12,176,906 B2
PWM-based continuous clock serial interface
Huihuang Chen, Shenzhen (CN); and Yan Zou, Suzhou (CN)
Assigned to Texas Instruments Incorporated, Dallas, TX (US)
Filed by TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed on Apr. 27, 2023, as Appl. No. 18/308,005.
Prior Publication US 2024/0364321 A1, Oct. 31, 2024
Int. Cl. H03K 7/08 (2006.01); G06F 13/42 (2006.01); H03K 3/011 (2006.01)
CPC H03K 7/08 (2013.01) [G06F 13/4291 (2013.01); H03K 3/011 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A circuit comprising:
a microcontroller having a clock output and a data output, the microcontroller comprising:
a serial-peripheral interface (SPI) circuit configured to provide an SPI clock signal and an SPI data signal to the data output;
a pulse-width modulation (PWM) generator configured to provide a continuous PWM signal to the clock output; and
a central processing unit (CPU) coupled to the SPI circuit and the PWM generator, the CPU having executable instructions configured to synchronize the PWM signal to the SPI clock signal.