摘要:
Methods and apparatuses are provided for increasing processor performance and energy saving via eliminating physical data movement to accomplish a move instruction. The apparatus comprises a first plurality of available physical registers mapped to a second plurality of logical registers, including a source logical register and a destination logical register. A renaming unit remaps the destination logical register to the same physical register mapping as the source logical register in response to a move instruction. In this way, the move instruction is effectively executed without moving data between physical registers. A method is provided for increasing processor performance and energy saving via eliminating physical data movement to accomplish a move instruction. The method comprises determining a mapping of a logical source register and a logical destination register to physical registers of a processor and then remapping the logical destination register to the same physical register mapping as the logical source register to affect an equivalent of the move instruction with actual data movement between physical registers.
摘要:
A data clock recovery system is provided. A phase detector is configured to sample an input data stream by way of a data clock and a second clock to generate a first signal indicating whether a data clock lags or leads a preferred phase of the data clock in relation to an input data stream. A phase controller is configured to process the first signal to shift a phase of the second clock toward a second preferred phase, and to shift a phase of the data clock toward the first preferred phase after the shifting of the phase of the second clock.
摘要:
One disclosed method comprises drawing current from a termination voltage supply and through a termination voltage delivery network by termination circuitry in response to a first signal on one or more lines terminated by the termination circuitry, shunting current from the termination voltage supply and through the termination voltage delivery network in response to a second signal on one or more terminated lines, and helping to reduce the shunted current for extended shunting.
摘要:
An embodiment of this invention provides a circuit and method for improving the testability of I/O driver/receivers. First, two separate I/O driver/receiver pads are electrically connected. A bit pattern generator in one of the I/O driver/receivers drives a bit pattern through a driver to the connected pads. The bit pattern is then driven through the receiver of a second I/O driver/receiver to a first clocked register. An identical bit pattern generator in the second I/O driver/receiver then drives an identical bit pattern into a second clocked register. A comparator compares the outputs of these two registers. If the two bit patterns don't match, the comparator signals there is a functional problem with one of the I/O driver/receivers.
摘要:
A modified pseudo-nMOS logic gate for use in systems in which quiescent current testing is desired. The load transistor of each pseudo-nMOS gate is controlled by a two-input load control gate. One input of the load control gate is connected to a global test signal and the second input of the load control gate is connected to the output of the pseudo-nMOS gate. In normal operation, the global test signal is logically true, and the load control gate has no effect on the pseudo-nMOS gate. During quiescent current testing, the global test signal is logically false and the output of the load control gate is determined by the logical output of the pseudo-nMOS gate. If the output of the pseudo-nMOS gate is logically true, the load control gate has no effect on the pseudo-nMOS gate. If the output of the pseudo-nMOS gate is logically false, the load control gate turns off the load transistor so that no static current flows through the load transistor. As a result, the logical state of the pseudo-nMOS gate is preserved, but the modified gate draws negligible static current during quiescent current testing.
摘要:
An integrated circuit is configured as a selected one of a terminated and a non-terminated bus agent for terminating a bus signal line. Reference level selection logic selects one of a first and a distinct second reference level as a selected level. The integrated circuit compares the bus signal line with the selected level to determine the state of the bus signal line.
摘要:
Termination circuitry is to terminate one or more lines and is to draw current from a termination voltage supply and through a termination voltage delivery network. Partial termination voltage current shunting may be used to help define a range of current variation through the termination voltage delivery network.
摘要:
An apparatus includes termination circuitry to terminate one or more lines. The termination circuitry draws a first current from a termination voltage supply through a termination voltage delivery network for each terminated line carrying a first signal. Partial current shunt circuitry draws a second current from the termination voltage supply through the termination voltage delivery network for each terminated line carrying a second signal. The first and second currents are distinct.
摘要:
One or more characteristics of circuitry for an output buffer are identified relative to a reference a plurality of times to produce a sequence of results. One or more compensation signals for one or more output buffers are generated based on results satisfying one or more conditions.
摘要:
A signal generated by circuitry for an output buffer is identified relative to a clock signal to control a slew rate of the circuitry for an output buffer.