ZHCSJE0 September 2018 UCD90320U
PRODUCTION DATA.
- 1 特性
- 2 应用
- 3 说明
- 4 修订历史记录
- 5 说明 （续）
- 6 Pin Configuration and Functions
- 7 Specifications
-
8 Detailed Description
- 8.1 Overview
- 8.2 Functional Block Diagram
- 8.3 Feature Description
- 8.4
Device Functional Modes
- 8.4.1 Rail Monitoring Configuration
- 8.4.2 GPI Configuration
- 8.4.3 Rail Sequence Configuration
- 8.4.4 Fault Responses Configuration
- 8.4.5 GPO Configuration
- 8.4.6 Margining Configuration
- 8.4.7 Pin Selected Rail States Configuration
- 8.4.8 Watchdog Timer
- 8.4.9 System Reset Function
- 8.4.10 Cascading Multiple Devices
- 8.4.11 Rail Monitoring
- 8.4.12 Status Monitoring
- 8.4.13 Data and Error Logging to EEPROM Memory
- 8.4.14 Black Box First Fault Logging
- 8.4.15 PMBus Address Selection
- 8.4.16 ADC Reference
- 8.4.17 Device Reset
- 8.4.18 Brownout
- 8.4.19 Internal Fault Management
- 8.4.20 Single Event Upset
- 8.5 Device Configuration and Programming
- 9 Application and Implementation
- 10Power Supply Recommendations
- 11Layout
- 12器件和文档支持
- 13机械、封装和可订购信息
8.4.11 Rail Monitoring
UCD90320U monitors up to 24 analog inputs including voltages, current, and temperature and eight digital inputs for POWER_GOOD. Use either the Fusion GUI or a PMBus interface host to poll data from UCD90320U. The Fusion GUI displays monitored rail voltage, current, and temperature information on the Monitor page, as shown in Figure 31. Use polling to debug system-level issues.
Figure 31. Fusion Digital Power Designer software Monitor Page Table 4. Rail State Value Descriptions
| RAIL STATE | VALUE | CONDITION FOR ENTERING RAIL STATE |
|---|---|---|
| IDLE | 1 | When a turn-ON condition is not met, or when rail is shut down due to a fault, or when the rail is waiting for the turn-ON period to resequence |
| SEQ_ON | 2 | Waits for the dependency to be met to assert the enable signal |
| START_DELAY | 3 | TON_DELAY to assert the enable signal |
| RAMP_UP | 4 | Enable signal is asserted and rail is approaching the power good threshold. If the power good threshold is set to 0 V, the rail stays at this state even if the monitored voltage is higher than 0 V. |
| REGULATION | 5 | When the monitoring voltage is higher than the power good threshold when the enable signal is asserted, rails stay at this state even if the voltage is below the power good threshold and continues as long as there is no fault action taken. |
| SEQ_OFF | 6 | Wait for the dependency to be met to de-assert the enable signal |
| STOP_DELAY | 7 | TOFF_DELAY to de-assert the enable signal |
| RAMP_DOWN | 8 | The enable signal is de-asserted and rail is ramping down. This state is available only if TOFF_MAX_WARN_LIMIT is not set to unlimited, or if the turn-off sequence is triggered by a fault action. The rail must not be under fault retry sequence to show this RAMP_DOWN state. Otherwise, the IDLE state is present. |