Device Module Local Control for Faster Imager Settings
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Solution Overview
Problem
Conventional device modules in network devices require a significant amount of time for various settings due to separate communication timing between device modules and a central processing circuit, leading to prolonged setup times.
Innovation Solution
The device module includes a non-volatile memory and a PMIC that can communicate with an imager and an interface, allowing simultaneous setting of imagers without waiting for communication timing with the processor, reducing the need for additional communication paths and circuit area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate communication timing is used between device modules and central processing circuit, then communication between multiple targets and processor can be established, but setting time for device modules is prolonged
Solution Approach 1:
The control function is segmented between the second control unit (local controller) and the first control unit (central processor). The second control unit handles time-critical setting operations locally, while the first control unit manages overall system coordination, allowing parallel operation and reducing communication bottlenecks.
Solution Approach 2:
The second control unit performs setting operations in advance by directly controlling the semiconductor device without waiting for processor communication cycles. This preliminary local control reduces the time required for device module configuration.
2Productivity
If additional communication paths are added for faster settings, then setting speed is improved, but circuit area increases
Solution Approach 1:
The existing communication path is made multi-functional by enabling the second control unit to operate in two states: communicating with the semiconductor device as a controller, and communicating with the first control unit via the interface as a target. This eliminates the need for separate dedicated setting communication paths.
Solution Approach 2:
The second control unit dynamically switches between two operational states depending on the communication mode required. This dynamic adaptability allows a single communication path to serve multiple purposes, avoiding the need for additional fixed communication channels.
3Reliability
If second control unit operates as target via interface, then communication with first control unit is established, but setting operation speed is reduced
Solution Approach 1:
The control hierarchy is segmented into two levels: the second control unit operates as a controller at the local level for fast setting operations, and as a target at the system level for coordination with the first control unit. This segmentation allows simultaneous operation at both levels without speed compromise.
Solution Approach 2:
The second control unit periodically switches between operating modes (controller mode for fast local settings, target mode for system coordination). This periodic alternation ensures both fast local response and proper system integration without permanent speed reduction.
Data Source
AI summary
A device module is provided, which includes a communication path, a semiconductor device, an interface connected to the communication path, and a second control unit. The second control unit, in a first state, generates a setting signal including setting information and inputs the setting signal to the semiconductor device.