SNVSC07A June   2021  – September 2022 LP876242-Q1

PRODUCTION DATA  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
    1. 5.1 Digital Signal Descriptions
  6. Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Internal Low Drop-Out Regulators (LDOVINT)
    6. 6.6  BUCK1, BUCK2, BUCK3, and BUCK4 Regulators
    7. 6.7  Reference Generator (REFOUT)
    8. 6.8  Monitoring Functions
    9. 6.9  Clocks, Oscillators, and DPLL
    10. 6.10 Thermal Monitoring and Shutdown
    11. 6.11 System Control Thresholds
    12. 6.12 Current Consumption
    13. 6.13 Digital Input Signal Parameters
    14. 6.14 Digital Output Signal Parameters
    15. 6.15 I/O Pullup and Pulldown Resistance
    16. 6.16 I2C Interface
    17. 6.17 Serial Peripheral Interface (SPI)
    18.     25
    19. 6.18 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Input Voltage Monitor
      2. 7.3.2 Power Resources
        1. 7.3.2.1 Buck Regulators
          1. 7.3.2.1.1 BUCK Regulator Overview
          2. 7.3.2.1.2 Spread-Spectrum Mode
          3. 7.3.2.1.3 Adaptive Voltage Scaling (AVS) and Dynamic Voltage Scaling (DVS) Support
          4. 7.3.2.1.4 BUCK Output Voltage Setting
          5. 7.3.2.1.5 Sync Clock Functionality
        2. 7.3.2.2 Internal Low Dropout Regulator (LDOVINT)
      3. 7.3.3 Residual Voltage Checking
      4. 7.3.4 Output Voltage Monitor and PGOOD Generation
      5. 7.3.5 General-Purpose I/Os (GPIO Pins)
      6. 7.3.6 Thermal Monitoring
        1. 7.3.6.1 Thermal Warning Function
        2. 7.3.6.2 Thermal Shutdown
      7. 7.3.7 Interrupts
      8. 7.3.8 Watchdog (WD)
        1. 7.3.8.1 Watchdog Fail Counter and Status
        2. 7.3.8.2 Watchdog Start-Up and Configuration
        3. 7.3.8.3 MCU to Watchdog Synchronization
        4. 7.3.8.4 Watchdog Disable Function
        5. 7.3.8.5 Watchdog Sequence
        6. 7.3.8.6 Watchdog Trigger Mode
        7. 7.3.8.7 WatchDog Flow Chart and Timing Diagrams in Trigger Mode
        8.       55
        9. 7.3.8.8 Watchdog Question-Answer Mode
          1. 7.3.8.8.1 Watchdog Q&A Related Definitions
          2. 7.3.8.8.2 Question Generation
          3. 7.3.8.8.3 Answer Comparison
            1. 7.3.8.8.3.1 Sequence of the 2-bit Watchdog Answer Counter
            2. 7.3.8.8.3.2 Watchdog Sequence Events and Status Updates
            3. 7.3.8.8.3.3 Watchdog Q&A Sequence Scenarios
      9. 7.3.9 Error Signal Monitor (ESM)
        1. 7.3.9.1 ESM Error-Handling Procedure
        2. 7.3.9.2 Level Mode
        3.       66
        4. 7.3.9.3 PWM Mode
          1. 7.3.9.3.1 Good-Events and Bad-Events
          2. 7.3.9.3.2 ESM Error-Counter
            1. 7.3.9.3.2.1 ESM Start-Up in PWM Mode
          3. 7.3.9.3.3 ESM Flow Chart and Timing Diagrams in PWM Mode
          4.        72
    4. 7.4 Device Functional Modes
      1. 7.4.1 Device State Machine
        1. 7.4.1.1 Fixed Device Power FSM
          1. 7.4.1.1.1 Register Resets and EEPROM read at INIT state
        2. 7.4.1.2 Pre-Configurable Mission States
          1. 7.4.1.2.1 PFSM Commands
            1. 7.4.1.2.1.1  REG_WRITE_IMM Command
            2. 7.4.1.2.1.2  REG_WRITE_MASK_IMM Command
            3. 7.4.1.2.1.3  REG_WRITE_MASK_PAGE0_IMM Command
            4. 7.4.1.2.1.4  REG_WRITE_BIT_PAGE0_IMM Command
            5. 7.4.1.2.1.5  REG_WRITE_WIN_PAGE0_IMM Command
            6. 7.4.1.2.1.6  REG_WRITE_VOUT_IMM Command
            7. 7.4.1.2.1.7  REG_WRITE_VCTRL_IMM Command
            8. 7.4.1.2.1.8  REG_WRITE_MASK_SREG Command
            9. 7.4.1.2.1.9  SREG_READ_REG Command
            10. 7.4.1.2.1.10 SREG_WRITE_IMM Command
            11. 7.4.1.2.1.11 WAIT Command
            12. 7.4.1.2.1.12 DELAY_IMM Command
            13. 7.4.1.2.1.13 DELAY_SREG Command
            14. 7.4.1.2.1.14 TRIG_SET Command
            15. 7.4.1.2.1.15 TRIG_MASK Command
            16. 7.4.1.2.1.16 END Command
          2. 7.4.1.2.2 Configuration Memory Organization and Sequence Execution
          3. 7.4.1.2.3 Mission State Configuration
          4. 7.4.1.2.4 Pre-Configured Hardware Transitions
            1. 7.4.1.2.4.1 ON Requests
            2. 7.4.1.2.4.2 OFF Requests
            3. 7.4.1.2.4.3 NSLEEP1 and NSLEEP2 Functions
            4. 7.4.1.2.4.4 WKUP1 and WKUP2 Functions
        3. 7.4.1.3 Error Handling Operations
          1. 7.4.1.3.1 Power Rail Output Error
          2. 7.4.1.3.2 Boot BIST Error
          3. 7.4.1.3.3 Runtime BIST Error
          4. 7.4.1.3.4 Catastrophic Error
          5. 7.4.1.3.5 Watchdog (WDOG) Error
          6. 7.4.1.3.6 Error Signal Monitor (ESM) Error
          7. 7.4.1.3.7 Warnings
        4. 7.4.1.4 Device Start-up Timing
        5. 7.4.1.5 Power Sequences
        6. 7.4.1.6 First Supply Detection
      2. 7.4.2 Multi-PMIC Synchronization
        1. 7.4.2.1 SPMI Interface System Setup
        2. 7.4.2.2 Transmission Protocol and CRC
          1. 7.4.2.2.1 Operation with Transmission Errors
          2. 7.4.2.2.2 Transmitted Information
        3. 7.4.2.3 SPMI Target Device Communication to SPMI Controller Device
          1. 7.4.2.3.1 Incomplete Communication from SPMI Target Device to SPMI Controller Device
        4. 7.4.2.4 SPMI-BIST Overview
          1. 7.4.2.4.1 SPMI Bus during Boot BIST and RUNTIME BIST
          2. 7.4.2.4.2 Periodic Checking of the SPMI
          3. 7.4.2.4.3 SPMI Message Priorities
    5. 7.5 Control Interfaces
      1. 7.5.1 CRC Calculation for I2C and SPI Interface Protocols
      2. 7.5.2 I2C-Compatible Interface
        1. 7.5.2.1 Data Validity
        2. 7.5.2.2 Start and Stop Conditions
        3. 7.5.2.3 Transferring Data
        4. 7.5.2.4 Auto-Increment Feature
      3. 7.5.3 Serial Peripheral Interface (SPI)
    6. 7.6 NVM Configurable Registers
      1. 7.6.1 Register Page Partitioning
      2. 7.6.2 CRC Protection for Configuration, Control, and Test Registers
      3. 7.6.3 CRC Protection for User Registers
      4. 7.6.4 Register Write Protection
        1. 7.6.4.1 ESM and Watchdog Configuration Registers
        2. 7.6.4.2 User Registers
    7. 7.7 Register Map
      1. 7.7.1 LP876242_map Registers
  8. Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Design Requirements
        1. 8.2.1.1 Buck Inductor Selection
        2. 8.2.1.2 Buck Input Capacitor Selection
        3. 8.2.1.3 Buck Output Capacitor Selection
        4. 8.2.1.4 LDO Output Capacitor Selection
        5. 8.2.1.5 VCCA Supply Filtering Components
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Voltage Scaling Precautions
      4. 8.2.4 Application Curves
    3. 8.3 Layout
      1. 8.3.1 Layout Guidelines
      2. 8.3.2 Layout Example
    4. 8.4 Power Supply Recommendations
  9. Device and Documentation Support
    1. 9.1 Receiving Notification of Documentation Updates
    2. 9.2 Support Resources
    3. 9.3 Trademarks
    4. 9.4 Electrostatic Discharge Caution
    5. 9.5 Glossary
  10. 10Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information
Configuration Memory Organization and Sequence Execution

The configuration memory is loaded from NVM into an SRAM. Figure 7-37 shows an example configuration memory with only two configured sequences.

GUID-B0F11E19-21EE-4FEB-84B5-5DDEDCBC6B53-low.gif Figure 7-37 Configuration Memory Script Example

As soon as the PMIC state reaches the mission states, it starts reading from the configuration memory until it hits the first END command. Setting up the triggers (1-28) must be the first section of the configuration memory, as well as the first set of trigger configurations. The trigger configurations are read and mapped to an internal lookup table that contains the starting address associated with each trigger in the configuration memory. If the trigger destination is an FFSM state then the address contains the fixed state value. After the trigger configurations are read and mapped into the SRAM, these triggers control the execution flow of the state transitions. The signal source of each trigger is listed under Table 7-11.

When a trigger or multiple triggers are activated, the PFSM execution engine looks up the starting address associated with the highest priority unmasked trigger, and starts executing commands until it hits an END command. The last commands before END statement is generally the TRIG_MASK command, which directs the PFSM to a new set of unmasked trigger configurations, and the trigger with the highest priority in the new set is serviced next. Trigger priority is determined by the Trigger ID associated with each trigger. The priority of the trigger decreases as the associated trigger ID increases. As a result, the critical error triggers are usually located at the lowest trigger IDs.

The TRIG_SET commands specify if a trigger is immediate or non-immediate. Immediate triggers are serviced immediately, which involves branching from the current sequence of commands to reach a new target destination. The non-immediate triggers are accumulated and serviced in the order of priority through the execution of each given sequence until the END command in reached. Therefore, the trigger ID assignment for each trigger can be arranged to produce the desired PFSM behavior.

The TRIG_MASK command determines which triggers are active at the end of each sequence, and is usually placed just before the END instruction. The TRIG_MASK takes a 28-bit input to allow any combination of triggers to be enabled with a single command. Through the definition of the active triggers after each sequence execution the TRIG_MASK command can be conceptualized as establishing a power state.

The above sequence of waiting for triggers and executing the sequence associated with an activated trigger is the normal operating condition of the PFSM execution engine when the PMIC is in the MISSION state. The FFSM state machine takes over control from the execution engine each time an event occurs that requires a transition from the MISSION state of the PMIC to a fixed device state.

Table 7-11 PFSM Trigger Selections
Trigger Name Trigger Source
IMMEDIATE_SHUTDOWN An error event causes one of the triggers defined in the FSM_TRIG_SEL_1/2 register to activate, and the intended action for the activated trigger is to immediate shutdown the device
MCU_POWER_ERROR Output failure detection from a regulator which is assigned to the MCU rail group (x_GRP_SEL = '01')
ORDERLY_SHUTDOWN An event which causes MODERATE_ERR_INT = '1'
FORCE_STANDBY nPWRON long-press event when NPOWRON_SEL = '01', or ENABLE = '0' when NPOWERON_SEL = '00'
SPMI_WD_BIST_DONE Completion of SPMI WatchDog BIST
ESM_MCU_ERROR An event that causes ESM_MCU_RST_INT
WD_ERROR An event that causes WD_RST_INT
SOC_POWER_ERROR Output failure detection from a regulator which is assigned to the SOC rail group (x_GRP_SEL = '10')
A NSLEEP2 and NSLEEP1 = '11'. More information regarding the NSLEEP1 and NSLEEP2 functions can be found under Section 7.4.1.2.4.3
WKUP1 A rising or falling edge detection on a GPIO pin that is configured as WKUP1
SU_ACTIVE A valid On-Request detection when STARTUP_DEST = '11'
B NSLEEP2 and NSLEEP1 = '10'. More information regarding the NSLEEP1 and NSLEEP2 functions can be found under Section 7.4.1.2.4.3
WKUP2 A rising or falling edge detection on a GPIO pin that is configured as WKUP2
SU_MCU_ONLY A valid On-Request detection when STARTUP_DEST = '10'
C NSLEEP2 and NSLEEP1 = '01', More information regarding the NSLEEP1 and NSLEEP2 functions can be found under Section 7.4.1.2.4.3
D NSLEEP2 and NSLEEP1 = '00'. More information regarding the NSLEEP1 and NSLEEP2 functions can be found under Section 7.4.1.2.4.3
SU_STANDBY A valid On-Request detection when STARTUP_DEST = '00'
SU_X A valid On-Request detection when STARTUP_DEST = '01'
WAIT_TIMEOUT PFSM WAIT command condition timed out. More information regarding the WAIT command can be found under Section 7.4.1.2.1.11
GPIO1 Input detection at GPIO1 pin
GPIO2 Input detection at GPIO2 pin
GPIO3 Input detection at GPIO3 pin
GPIO4 Input detection at GPIO4 pin
GPIO5 Input detection at GPIO5 pin
GPIO6 Input detection at GPIO6 pin
GPIO7 Input detection at GPIO7 pin
GPIO8 Input detection at GPIO8 pin
GPIO9 Input detection at GPIO9 pin
GPIO10 Input detection at GPIO10 pin
I2C_0 Input detection of TRIGGER_I2C_0 bit
I2C_1 Input detection of TRIGGER_I2C_1 bit
I2C_2 Input detection of TRIGGER_I2C_2 bit
I2C_3 Input detection of TRIGGER_I2C_3 bit
I2C_4 Input detection of TRIGGER_I2C_4 bit
I2C_5 Input detection of TRIGGER_I2C_5 bit
I2C_6 Input detection of TRIGGER_I2C_6 bit
I2C_7 Input detection of TRIGGER_I2C_7 bit
SREG0_0 Input detection of SCRATCH_PAD_REG_0 bit 0
SREG0_1 Input detection of SCRATCH_PAD_REG_0 bit 1
SREG0_2 Input detection of SCRATCH_PAD_REG_0 bit 2
SREG0_3 Input detection of SCRATCH_PAD_REG_0 bit 3
SREG0_4 Input detection of SCRATCH_PAD_REG_0 bit 4
SREG0_5 Input detection of SCRATCH_PAD_REG_0 bit 5
SREG0_6 Input detection of SCRATCH_PAD_REG_0 bit 6
SREG0_7 Input detection of SCRATCH_PAD_REG_0 bit 7
0 Always '0'
1 Always '1'