TC1765T datasheet(52/88 Pages) INFINEON

52 / 88 page

TC1765

Data Sheet

V1.2, 2002-12

Preliminary

Power Management System

The TC1765 power management system allows software to configure the various

processing units so that they automatically adjust to draw the minimum necessary power

for the application.

There are four power management modes:

•Run Mode

• Idle Mode

• Sleep Mode

• Deep Sleep Mode

Table 5 describes the features of the power management modes.

Table 5

Power Management Mode Summary

Mode

Description

Run

The system is fully operational. All clocks and peripherals are enabled,

as determined by software.

Idle

The CPU clock is disabled, waiting for a condition to return it to Run

Mode. Idle Mode can be entered by software when the processor has no

active tasks to perform. All peripherals remain powered and clocked.

Processor memory is accessible to peripherals. A reset, Watchdog Timer

event, a falling edge on the NMI pin, or any enabled interrupt event will

return the system to Run Mode.

Sleep

The system clock continues to be distributed only to those peripherals

programmed to operate in Sleep Mode. Interrupts from operating

peripherals, the Watchdog Timer, a falling edge on the NMI pin, or a reset

event will return the system to Run Mode. Entering this state requires an

orderly shut-down controlled by the Power Management State Machine.

Deep Sleep

The system clock is shut off; only an external signal will restart the

system. Entering this state requires an orderly shut-down controlled by

the Power Management State Machine (PMSM).

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