INITIAL OPERATIONAL MODE FOR INTEGRATED CIRCUIT

摘要

An integrated circuit (IC) and associated method support using a pre-use configuration for determining an initial/preferred operational mode for the IC from plural operational modes that may be entered following power-up cycles of the IC. The initial/preferred operational mode can be determined after the design phase of the IC so that, during IC operation, wasted power or delay are not incurred by first requiring that the IC power up in a default operational mode and subsequently run executive code to reprogram the IC to enter an operational mode that is preferred for the application for which the IC is being used by the IC integrator/user. The configurations determine clock frequencies and/or power levels for core processing and/or peripheral modules and allow the same IC design/die to be targeted to a spectrum of different power usage/performance applications by the integrator/user.

主权项

1. An integrated circuit (IC), comprising:
a controller module; and a plurality of component modules, each capable of operating in a plurality of different power modes, wherein the IC is designed to be selectively pre-use configured into any one of a plurality of different selectable power-on reset modes, the power-on reset modes including:
a first power-on reset mode corresponding to the plurality of component modules operating in a first set of power modes; anda second power-on reset mode corresponding to the plurality of component modules operating in a second set of power modes different from the first set of power modes, such that:
if the IC is pre-use configured with the first power-on reset mode, then, when the IC is powered up following the pre-use configuration, the controller module causes the component modules to operate directly in the first set of power modes; andif the IC is pre-use configured with the second power-on reset mode, then, when the IC is powered up following pre-use configuration, the controller module causes the component modules to operate directly in the second set of power modes.