Sensor TDM Frame Slotting for Raw and Processed Data
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Solution Overview
Problem
Current TDM interfaces in audio devices are unidirectional and limited to transmitting raw, unprocessed data, unable to handle advanced data from sensors like accelerometers, gyroscopes, and magnetometers, such as state information and device status.
Innovation Solution
A sensor with a TDM interface that reserves slots for processed data transmission within a TDM frame, allowing both raw and processed data to be transmitted in a single signal, using repurposed raw data values for additional information and enabling/disabling based on frame synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If current TDM interfaces are used to transmit data, then raw unprocessed data can be transmitted, but processed data such as state information and device status cannot be transmitted
Solution Approach 1:
The TDM frame is segmented into multiple slots, with specific slots reserved for processed data transmission while other slots transmit raw data. This segmentation allows the interface to handle both raw and processed data simultaneously without conflict, resolving the limitation of traditional single-function TDM interfaces.
Solution Approach 2:
The TDM interface is enhanced to perform multiple functions: transmitting both raw unprocessed data and processed data (state information, device status, sensor readings) through the same interface using different slots within the TDM frame structure, making it a universal data transmission interface.
2Adaptability or versatility
If additional interfaces are added to transmit processed data, then both raw and processed data can be transmitted, but device complexity and power consumption increase
Solution Approach 1:
Multiple data transmission functions (raw data transmission and processed data transmission) are merged into a single TDM interface by utilizing different slots within the same TDM frame structure, eliminating the need for separate interfaces and reducing overall device complexity.
Solution Approach 2:
The single TDM interface is designed to be universal, handling both raw data and processed data transmission through slot allocation, thereby eliminating the need for additional dedicated interfaces and simplifying the device architecture.
3Adaptability or versatility
If additional interfaces are added to transmit processed data, then both raw and processed data can be transmitted, but power consumption increases
Solution Approach 1:
Multiple data transmission functions are combined into one active TDM interface using slot-based multiplexing, so only one interface needs to be powered on regardless of whether raw data, processed data, or both are being transmitted, thereby reducing power consumption compared to having multiple separately powered interfaces.
Solution Approach 2:
The universal TDM interface handles all data transmission needs (raw and processed) through a single powered interface with configurable slot allocation, eliminating the need to power multiple separate interfaces and thus reducing overall power consumption.
4Adaptability or versatility
If TDM interfaces are made bidirectional with addressing capability, then processed data and register reading can be transmitted, but interface complexity increases
Solution Approach 1:
The TDM frame is segmented into slots with specific roles: some slots carry bidirectional data including addressing information for register operations, while other slots carry unidirectional processed data. This segmentation enables complex functionality while maintaining a relatively simple interface structure.
Solution Approach 2:
The TDM interface implements dynamic slot allocation where certain slots can be configured for bidirectional communication (including addressing and register access) while others remain unidirectional, allowing the interface to adapt its complexity based on specific operational requirements.
Data Source
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AI summary
The present disclosure is directed to a device (10) and method for generating and transmitting a TDM signal including both raw data and processed data. The device includes a sensor (18) having a time division multiplexing (TDM) interface (24). The TDM interface (24) transmits both raw data and processed data in a single TDM signal by reserving one or more slots inside a TDM frame for transmission of the processed data. The sensor (18) also embeds additional information inside a data stream of raw data by repurposing one or more of values of the raw data as an exception code, flag, or another type of notification. The device (10) is also enabled to transmit data, and disabled when not in use in order to conserve power.