SLVUD30A December   2024  – December 2025 TPS65214

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2PDN and Sequence Diagrams
    1. 2.1 TPS6521401 Power Sequence and Example Block Diagram
  6. 3NVM Device Settings
    1. 3.1  Device ID
    2. 3.2  Enable Settings
    3. 3.3  Regulator Voltage Settings
    4. 3.4  Sequence Settings
      1. 3.4.1 Power-Up Sequence
      2. 3.4.2 Power-Down Sequence
    5. 3.5  EN / PB / VSENSE Settings
    6. 3.6  Multi-Function Pin Settings
    7. 3.7  Over-Current Deglitch
    8. 3.8  Mask Settings
    9. 3.9  Discharge Check
    10. 3.10 Low Power Mode
  7. 4Revision History

3.6 Multi-Function Pin Settings

The TPS6521401 has three multi-function pins: GPIO/VSEL, MODE/STBY, and GPO/nWAKEUP. This section describes how each of the multi-function pins are configured.

Table 3-11 Multi-Function Pin Settings
Pin NameSettingRegister AddressField NameValueDescription
GPIO / VSELFunction selection0x1EGPIO_VSEL_CONFIG0x0Configured as GPIO
I/O selection0x1FGPIO_CONFIG0x1

Configured as an output

(only applicable if GPIO_VSEL_CONFIG=0x0)

Pin polarity 0x13 GPIO_SEQUENCE_POLARITY 0x0

LOW - off / HIGH - on

(only applicable if GPIO_VSEL_CONFIG=0x0 and GPIO_CONFIG=0x1)
Rail selection0x1FVSEL_RAIL0x0BUCK1

(only applicable if GPIO_VSEL_CONFIG=0x1)

MODE / STBYFunction selection0x20MODE_STBY_CONFIG0x2MODE and STBY
Pin polarity0x1FMODE_STBY_POLARITY0x0 [if configured as MODE] LOW - auto-PFM / HIGH - forced PWM. [if configured as a STBY] LOW - STBY state / HIGH - ACTIVE state.
GPO / nWAKEUPFunction selection0x20GPO_nWAKEUP_CONFIG0x0GPO

  • Operation of the buck converters in auto-PFM and forced-PWM can be changed by I2C (register field: MODE_I2C_CTRL).

    Table 3-12 Default register setting for MODE_I2C_CTRL
    Register Address Field Name Value Description
    0x1F MODE_I2C_CTRL 0x0 0x0 = Auto PFM

    0x1 = Forced PWM