SLVSAN9C April   2011  – March  2019 UCD90120A

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Simplified Schematic
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 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 Electrical Characteristics
    6. 6.6 I2C/SMBus/PMBus Timing Requirements
    7. 6.7 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 TI Fusion GUI
      2. 7.3.2 PMBus Interface
      3. 7.3.3 Rail Configuration
    4. 7.4 Device Functional Modes
      1. 7.4.1  Power-Supply Sequencing
        1. 7.4.1.1 Turn-On Sequencing
        2. 7.4.1.2 Turn-Off Sequencing
        3. 7.4.1.3 Sequencing Configuration Options
      2. 7.4.2  Pin-Selected Rail States
      3. 7.4.3  Monitoring
        1. 7.4.3.1 Voltage Monitoring
        2. 7.4.3.2 Current Monitoring
        3. 7.4.3.3 Remote Temperature Monitoring and Internal Temperature Sensor
        4. 7.4.3.4 Temperature by Host Input
      4. 7.4.4  Fault Responses and Alert Processing
      5. 7.4.5  Shut Down All Rails and Sequence On (Resequence)
      6. 7.4.6  GPIOs
      7. 7.4.7  GPO Control
      8. 7.4.8  GPO Dependencies
      9. 7.4.9  GPO Delays
      10. 7.4.10 State Machine Mode Enable
      11. 7.4.11 GPI Special Functions
      12. 7.4.12 Power-Supply Enables
      13. 7.4.13 Cascading Multiple Devices
      14. 7.4.14 PWM Outputs
        1. 7.4.14.1 FPWM1-8
        2. 7.4.14.2 PWM1-4
      15. 7.4.15 Programmable Multiphase PWMs
      16. 7.4.16 Margining
        1. 7.4.16.1 Open-Loop Margining
        2. 7.4.16.2 Closed-Loop Margining
      17. 7.4.17 System Reset Signal
      18. 7.4.18 Watch Dog Timer
      19. 7.4.19 Run Time Clock
      20. 7.4.20 Data and Error Logging to Flash Memory
      21. 7.4.21 Brownout Function
      22. 7.4.22 PMBus Address Selection
    5. 7.5 Programming
      1. 7.5.1 Device Configuration and Programming
        1. 7.5.1.1 Full Configuration Update While in Normal Mode
      2. 7.5.2 JTAG Interface
      3. 7.5.3 Internal Fault Management and Memory Error Correction (ECC)
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Estimating ADC Reporting Accuracy
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Documentation Support
      1. 11.1.1 Related Documentation
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

7.4.6 GPIOs

The UCD90120A has 22 GPIO pins that can function as either inputs or outputs. Each GPIO has configurable output mode options including open-drain or push-pull outputs that can be actively driven to 3.3 V or ground. There are an additional four pins that can be used as either inputs or PWM outputs but not as GPOs. Table 3 lists possible uses for the GPIO pins and the maximum number of each type for each use. GPIO pins can be dependents in sequencing and alarm processing. They can also be used for system-level functions such as external interrupts, power-goods, resets, or for the cascading of multiple devices. GPOs can be sequenced up or down by configuring a rail without a MON pin but with a GPIO set as an enable.

Table 3. GPIO Pin Configuration Options

PIN NAME PIN RAIL EN
(12 MAX)		 GPI
(8 MAX)		 GPO
(12 MAX)		 PWM OUT
(12 MAX)		 MARGIN PWM
(10 MAX)
FPWM1/GPIO5 17 X X X X X
FPWM2/GPIO6 18 X X X X X
FPWM3/GPIO7 19 X X X X X
FPWM4/GPIO8 20 X X X X X
FPWM5/GPIO9 21 X X X X X
FPWM6/GPIO10 22 X X X X X
FPWM7/GPIO11 23 X X X X X
FPWM8/GPIO12 24 X X X X X
GPI1/PWM1 31 X X
GPI2/PWM2 32 X X
GPI3/PWM3 42 X X X
GPI4/PWM4 41 X X X
GPIO1 11 X X X
GPIO2 12 X X X
GPIO3 13 X X X
GPIO4 14 X X X
GPIO13 25 X X X
GPIO14 29 X X X
GPIO15 30 X X X
GPIO16 33 X X X
GPIO17 34 X X X
GPIO18 35 X X X
TCK/GPIO19 36 X X X
TDO/GPIO20 37 X X X
TDI/GPIO21 38 X X X
TMS/GPIO22 39 X X X