This document discusses interrupt handling and the effect of interrupts on the pipeline. If an interrupt is pending and is subsequently enabled by a CLRC instruction where would it be taken and what happens when it returns from the ISR?
With the introduction of the MPY634 multipliers wideband analog multiplication need no longer be a multicap affair or imply performance compromises. Along with its 10MHz small-signal bandwidth the four-quadrant chip has a laser-trimmed DC accuracy of 0.25% and adjustable scale factor and the ability to drive loads down to 2kΩ.
The Fast Fourier Transform (FFT) is an efficient means for computing the Discrete Fourier Transform (DFT). It is one of the most widely used computational elements in Digital Signal Processing (DSP) a
Viterbi Coprocessor (VCP) is a programmable peripheral for decoding of convolutional codes integrated into Texas Instruments' TMS320C6416 DSP device. The VCP is controlled via memory mapped control registers and data buffers. Control registers can be accessed directly by the CPU whereas data buffers are typically accessed using the EDMA controller. This application note describes the relationshi
Classical op amps such as the OPA627 have excellent performance in applications where the required gain bandwidth is low compared to the gain-bandwidth product of the op amp. However increasing closed-loop gain decreases the error-reducing loop gain. Furthermore starting at relatively low frequencies the loop gain rolls-off at 20dB/decade of signal frequency increase. In combination these effec
The low dropout (LDO) voltage regulator brings the advantage of power savings to system design byreducing the voltage required to maintain output regulation. However the traditional LDO has alwaysbrought with it the disadvantage of placing tight restrictions on the equivalent series resistance (ESR) ofthe output capacitor in order to keep the regulator stable. This requirement has been elim
Though low power consumption is a feature of CMOS devices sometimes this feature does not meet a designer?s system power supply constraints. Therefore a partial system power down or multiple Vcc supplies are used to meet the needs of the system. This document shows electrostatic discharge protection circuits. It also provides circuit and bus driver examples of partial system power down and curren
This application note describes the implementation of multichannel echo control on a TMS320C62xx processor core that can cancel echoes with a 4-32-ms delay. This software is based on the leaky normalized least mean square (LMS) filter with either 16- or 32-bit weighting coefficients.
Design of a power supply for a high-performance point-of-load processor requires special attention to manage core and input/output (I/O) voltage sequencing which is critical to device operation and long term reliability. The TPS54x80 devices of low input voltage synchronous-buck dc/dc converters are designed for easily implementing sequential ratio-metric or simultaneous sequencing schemes. F
In-field firmware update is a feature that is increasingly used in microcontroller-based applications today and important benefits include service and support to products that are already deployed in the field (for example being able to correct bugs or add new functionalities). As common as in-field firmware updates are in embedded systems this feature is also commonly exploited by attackers; if
Current-feedback amplifiers have nearly constant bandwidth for varying closed-loop gains. The reason is that the user can adjust the open-loop gain of the current-feedback amplifier by changing the feedback network without affecting the open-loop pole.