the Hi,
I wonder if general users can use VBUS_EN_TEST/ID_EN_TEST for controlling the impedance of USB signals.
From TPS_65950_swca0921.pdf, we can see following descriptions.
3 Programming Models
3.1 TPS65950, TPS65930, and TPS65920
Two registers control the eye tuning:
• VBUS_EN_TEST: Controls the driver output impedance ZHSTX
• ID_EN_TEST: Controls the driver strength and AC boost feature
3.1.1 Procedure to Access Registers
The VRUSB_3V1, VRUSB_1V8, and VRUSB_1V5 USB regulators must be set to on to start the
configuration. These registers are read/write protected. It is mandatory to:
1. Write: 0xB6 at address 0x97, I2C address 0x49
2. Update: VBUS_EN_TEST and/or ID_EN_TEST
3. Write: 0x00 at address 0x97, I2C address 0x49
Regards,
Devin