Engineering Scope
Multi-power domain and peripheral power-down control was developed to solve specific engineering problems in low-power projects. The work starts from the customer's existing design and business requirements, splits the power domain, designs switches, signal isolation and recovery timing; delivers the power tree, timing diagram, switching circuit, drive and shutdown test records according to the agreed modules.
Check input with baseline
Check the main controller and peripheral power trees, interface levels, power-on constraints and loads, and clarify the measurement and modification scope.
Implementation and adaptation
Split the power domain, design switches, signal isolation and recovery timing, and record solution trade-offs and dependencies.
Target environment joint debugging
Test single domain shutdown, power sequence changes and reverse power supply of signal connections to confirm business behavior after parameter changes.
Document and record delivery
Provide power tree, timing diagram, switching circuit, drive and shutdown test records, describing version, construction or usage method.
Project Workflow
- Input validation: master and peripheral power trees, interface levels, power-up constraints and loads.
- Implementation method: Split the power domain, design switches, signal isolation and recovery timing.
- Phase review: Test single domain shutdown, power sequence changes and reverse power supply of signal connections.
- Project delivery: power tree, timing diagram, switching circuit, drive and shutdown test records.
Design Conditions and Functional Limits
Paths may be formed by signal pins, protection, or other power paths. It is necessary to measure and isolate item by item on the premise of clear circuit connections.
Special services take the agreed module as the implementation boundary. When hardware modifications, third-party agreements, overall platforms or external tests are involved, the interfaces, workload and responsibilities are confirmed separately, and local modifications are not directly used as conclusions on the performance of the complete device.
Project Inputs
- Master and peripheral power trees, interface levels, power-on constraints and loads.
- Existing prototypes and reproducible problems, or new project functionality and power consumption targets.
- Modified design, source code and third-party dependencies are allowed; functionality and compatibility need to be maintained.
- Delivery list, target environment, sample scope, project milestones and acceptance methods.
Delivery and Acceptance
| Delivery content | Check method |
|---|---|
| Power tree, timing diagram, switching circuit, drive and shutdown test records | Check the editability, version, usage instructions and dependencies by file list. |
| Implementation verification | Test single domain shutdown, power sequence changes and reverse power supply of signal connections, and retain the corresponding working conditions and results. |
| Comparison of functions and power consumption | Fixed applicable hardware, software, battery, temperature and business cycles, accounting for changes in conditions and their impact. |
| Reproduction and follow-up maintenance | Provide build or run steps, known limitations, parameter ranges, and uncovered cases. |
Frequently Asked Questions
Why do peripherals still consume power after they are powered off?+
Paths may be formed by signal pins, protection, or other power paths. It is necessary to measure and isolate item by item on the premise of clear circuit connections.
What information do I need to prepare before starting the project?+
This work focuses on the main controller and peripheral power trees, interface levels, power-on constraints and loads. When the data is incomplete, first determine the scope that needs supplementary testing or sorting out, and then proceed to implementation.
Can it be implemented together with the complete device development project?+
It can be used as a work package in the overall project, or it can be implemented separately for existing products. It is necessary to explain the interfaces with other modules, versions and final machine verification responsibilities.
Engineering References
The configuration of GPIO should be checked together with the external circuit, sleep mode and wake-up status; the actual parameters are subject to the target chip data and the whole board test. GPIO and power state design reference
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