SLVUCG6 November 2022 TPS650350-Q1
An onboard MCU acts as a USB adapter to the PMIC. This adapter allows I2C communication to the host PC as well as GPIO assertion and monitoring. By default, the onboard adapter is powered by through an onboard dedicated 3.3 V LDO (U5). Additional configurations are allowed by reconfiguring jumpers J24 and J25, shown in Table 3-1 and Table 3-2. The onboard adapter must have power applied through a valid configuration.
| Selection Jumper Pin | Adapter Supply Bus |
|---|---|
| Pin 1 (PMIC Buck 1 Output) | Pin 2 (Adapter Input Supply Rail) |
| Pin 3 (PMIC LDO Output) | Pin 4 (Adapter Input Supply Rail) |
| Pin 5 (Dedicated 3.3 V LDO Output - Default) | Pin 6 (Adapter Input Supply Rail) |
| Selection Jumper Pin | Dedicated 3.3V LDO Supply Bus |
|---|---|
| Pin 1 (PMIC Buck 1 Output) | Pin 2 (Dedicated 3.3 V LDO Input Rail) |
| Pin 3 (EVM VIN- Default) | Pin 4 (Dedicated 3.3 V LDO Input Rail) |
| Pin 5 (VBUS Rail) | Pin 6 (Dedicated 3.3 V LDO Input Rail) |
The following Jumpers in Table 3-3 connect the USB adapter to PMIC functional pins. These can be disconnected for flexibility.
| Jumper | PMIC Pin |
|---|---|
J20 | nINT |
| J21 | nRST |
| J22 | GPIO |
J23 | SEQ |