Texas Instruments Corporation

Venkateswar Reddy Kowkutla

Chunhua Hu

Rejitha Nair

Erkan Bilhan

John Chrysostom Apostol

Sumant Dinkar Kale

Kazunobu Shin

Siva Srinivas Kothamasu

Raghavendra Santhanagopal

Lars Risbo

Denis R Beaudoin

Charles Lance Fuoco

Thomas Anton Leyrer

Varun Singh

Venkateswara Reddy Pothireddy

Eric Robert Hansen

Anthony Frederick Seely

Ramakrishnan Venkatasubramanian

Jason Lynn Peck

Jose Luis Flores

Josey George Angilivelil

Nishanth Menon

Rajesh Kumar Vanga

Douglas Allen Roberson

Charles Gerlach

Thomas Holm Hansen

Kenneth M Bell

Ritesh Dhirajlal Sojitra

Luis Eduardo Ossa

Michael Joseph Tsecouras

Anker Bjørn-Josefsen

Sai Karthik Rajaraman

Shifeng Zhao

Anker Josefsen

David Edward Zaucha

Ravi Teja Reddy

Rajagopal Kollengode Ananthanarayanan

Stephan H Lin

Santhanagopal Raghavendra

Shigeng Zhao

A circuit device is provided and includes a first power domain comprising a universal serial bus (USB) subsystem and/or a memory controller subsystem. The first power domain is configured to isolate the USB subsystem and/or the memory controller subsystem from a power-on-reset signal asserted during a low power mode.

Power-on-reset signal isolation during lower power mode

A system, e.g., a system on a chip (SoC) includes a first domain including a first processor configured to boot the system; a second domain including a processing subsystem having a second processor; and isolation circuitry between the first domain and the second domain During boot-up of the system, the first processor provides code to the second domain. When the code is executed by the second processor, it configures the processing subsystem as either a safety domain or as a general-purpose processing domain. The safety domain may an external safety domain or an internal safety domain.

System on a chip with an integrated configurable safety master microcontroller unit

An integrated circuit includes a processor core configured to perform boot operations; and a microcontroller coupled to a processor core. The microcontroller includes: a set of microcontroller components; and a state machine coupled to the set of microcontroller components. The state machine is configured to perform self-test operations on the set of microcontroller components before the boot operations.

Integrated circuit with state machine for pre-boot self-tests

In described examples, an integrated circuit (IC) includes an isolation, an input/output (IO), and a low power mode (LPM) control logic. The isolation includes a level shift with pull-down configured to weakly pull down the voltage of signals that travel through the isolation. The IO includes an input and a physical connector for coupling to a power management IC. The IO provides an asserted-low LPM enable signal to the physical connector in response to the IO input. An output of the LPM control logic is coupled via the isolation to the input of the IO. The LPM control logic provides a high voltage signal to the input of the IO as a default during power on reset (POR) of the IC. The pull-down pulls the LPM enable signal voltage to the asserted low voltage in response to a voltage of the LPM enable signal falling below a threshold.

Integrated circuit with low power mode management

A system on a chip (SOC) is configured to support multiple time domains within a time-sensitive networking (TSN) environment. TSN extends Ethernet networks to support a deterministic and high-availability communication on Layer 2 (data link layer of open system interconnect 'OSI' model) for time coordinated capabilities such as industrial automation and control applications. Processors in a system may have an application time domain separate from the communication time domain. In addition, each type time domain may also have multiple potential time masters to drive synchronization for fault tolerance. The SoC supports multiple time domains driven by different time masters and graceful time master switching. Timing masters may be switched at run-time in case of a failure in the system. Software drives the SoC to establish communication paths through a sync router to facilitate communication between time providers and time consumers. Multiple time sources are supported.

Apparatus and mechanism to support multiple time domains in a single SoC for time sensitive network

An electronic device comprising one or more subcircuits configured to receive a clock signal, the clock signal configured to switch from a reference clock signal to a second clock signal based on a clock bypass signal, a timer configured to receive the reference clock signal and output an alignment signal based on the reference clock signal, wherein a frequency of the alignment signal is determined based on clock frequencies of the one or more subcircuits; a clock alignment module coupled to the timer and the one or more subcircuits and configured to receive the clock bypass signal, determine that the clock bypass signal has changed to switch the one or more subcircuits to the reference clock signal from the second clock signal, block the clock signal from being received by the one or more subcircuits, receive the alignment signal, and unblock the clock signal based on the alignment signal.

Technique for clock alignment supporting reset isolation

An example includes a circuit including a first AND gate including a first input terminal, a second input terminal, and an output terminal, a second AND gate including a first input terminal, a second input terminal, and an output terminal, and a third AND gate including a first input terminal, a second input terminal, and an output terminal. The circuit also includes an OR gate including a first input terminal coupled to the output terminal of the first AND gate, a second input terminal coupled to the output terminal of the second AND gate, a third input terminal coupled to the output terminal of the third AND gate, and an output terminal.

Adaptive voltage scaling system for out of context functional safety SoC

A system on a chip (SoC) includes a first domain comprising a first processor configured to boot the SoC, and a first debug subsystem, a second domain comprising a second processor, the second domain configurable as either a safety domain or a general-purpose processing domain, and isolation circuitry between the first domain and the second domain. During boot-up of the SoC, the first processor provides code to the second domain which, when executed by the second processor, configures the second domain as either a safety domain or as a general-purpose processing domain.

An integrated circuit includes: a clock domain having a clock domain input; and clock management logic coupled to the clock domain. The clock management logic includes: a PLL having a reference clock input and a PLL clock output; a divider having a divider input and a divider output, the divider input coupled to the PLL clock output; and bypass logic having a first clock input, a second clock input, a bypass control input, and a bypass logic output, the first clock input coupled to divider output, the second clock input coupled to the reference clock input, and the bypass logic output coupled to the clock domain input. The bypass logic selectively bypasses the PLL and divider responsive to a bypass control signal triggered by a reset signal. The reset signal also triggers a reset control signal delayed relative to the bypass control signal.

Integrated circuit with high-speed clock bypass before reset

Disclosed embodiments include an electronic system with a power on reset (POR) circuit. The POR circuit includes first voltage detection circuitry to perform a first detection on a supply voltage and to output a first control signal in response to the first detection, second voltage detection circuitry to perform a second detection on the supply voltage and to output a second control signal in response to the second detection, and third voltage detection circuitry to perform a third detection on the supply voltage and to output at least one third control signal in response to the third detection. The POR circuit further has sequencing circuitry with a first input to receive the at least one third control signal and to output a reset signal in response to the at least one third control signal.

Reset isolation for an embedded safety island in a system on a chip

A functional safety POR system requires implementing voltage detectors and supervisory functions in a complex SOC. These features are implemented within the SOC without external components. Three stages of voltage monitoring are implemented to ensure redundancy.

On chip power on reset with integrated supervisory functions for a functional safety system

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Allen, TX, United States of America

Venkateswar Reddy Kowkutla