Nvidia Corporation

Nxp B.v.

Koninklijke Philips Corporation N.v.

Otto Steinbusch

Zahid Najam

Robert De Gruijl

Marino Strik

An automatic load detection system. A first reference signal that may be known apriori can be used for load detection. For example, the first reference signal may be used for invisible portion of a frame. The DAC receives the first reference signal and outputs a signal that is based on the first reference signal. The output of the DAC may have two known values depending on whether the load is coupled to the DAC, e.g., by having a different impedance. Thus, the output signal may be used for detecting whether the load is uncoupled from the DAC. If it is determined that the load is uncoupled from the DAC, the clocking signal to the DAC may be turned off. Thus, DAC no longer consumes power when the load is uncoupled, thereby saving power.

Power management using automatic load/unload detection of DAC

Transfer circuits () for monitoring in a monitor clock domain target events that occur in a target clock domain () are disclosed. Some embodiments () impose significant constraints on the domain clocks and include: an event detector (); a sending circuit () that changes the value of a request signal () with each event; and a receiving circuit () that detects changes in the request signal. Other embodiments work for a broader range of clocks and include: a counter () that generates an incremental count () of event occurrences while a transfer is taking place; sending and receiving registers () for the incremental count; the request sending and receiving circuits (), where the request signal changes value for each transfer of the incremental count; and sending and receiving circuits () for an acknowledgement signal.

Lossless transfer of events across clock domains

Embodiments of the present invention recite a method and system for allocating memory resources. In one embodiment, a control component coupled with a memory device determines that a data buffer adjacent to a boundary of a first FIFO queue does not contain current data. The control component also determines that a second data buffer of a second FIFO queue adjacent to the boundary does not contain current data. The control component then automatically shifts the boundary to include the second data buffer in the first FIFO queue.

Automatic resource sharing between FIFOs

Multiple test access port (TAP) controllers on a single chip are accessed, while maintaining the appearance to an outside observer of having only a single test access port controller. By adding a single bit to a data register () of each of a plurality of TAP controllers (), along with straightforward combinational logic, the plurality of TAP controllers can be accessed without the need for additional chip pins, and without the need for additional TAP controllers. Toggling the state of the added bits in the respective data registers of the plurality of TAP controllers provides the control information for either selecting one TAP controller or daisy-chaining of the plurality of TAP controllers.

Connecting multiple test access port controllers on a single test access port

An interpreter uses a symbol table containing information for resolving symbolic references in instructions. Memory is provided for storing symbolic reference-result associations, the result of the association having resulted from resolving the symbolic reference of the association for an instruction. The memory is organized in groups of locations, each for results for a different category of instructions. During execution of a particular instruction, that group is consulted which is assigned to the category to which the particular instruction belongs. If that group contains an association for the symbolic reference in the particular instruction. If there is such an association, the result from the association is used as operand data for executing the particular instruction. If there is no such association, the particular symbolic reference is resolved by means of the symbol table. The result from said resolving is used as the operand data for executing the particular instruction and an association between the symbolic reference and the result of said resolving is stored in the group assigned to the category of the particular instruction.

Growing community of inventors

Mountain View, CA, United States of America

Otto Steinbusch