C161U View Datasheet(PDF) - Infineon Technologies

Part Name

Description

Manufacturer

C161U

Embedded C166 with USB,USART and SSC

Infineon Technologies 

C161U

Overview

Power Management

Besides the basic power-save (power-reduction) modes Idle mode and Power down

mode, the C161U offers a number of additional power management features, which can

be selectively used for effective power reduction. Refer to Table 1.

Table 1

Overview of Power Management Modes

Mode Description

CPU Wake-up

Running The system is fully operational. All clocks and ----

mode peripherals are set and enabled, as determined

by software. Full power consumption.

Slow

down

mode

The CPU runs slower. The oscillator runs at a

lower frequency; the clock is divided by a

programmable factor (1...32). Peripherals

management is possible; incl. PLL On/Off.

Refer to register SYSCON 2.

Controlled by software.

Idle

mode

When the processor has no active tasks to • Any interrupt

perform, it enters Idle mode by the IDLE

• Reset

command. All peripherals remain powered and

clocked, however, peripherals management is

possible. For detailed description see

Chapter 19.1, "Idle Mode".

Sleep

mode

The program stops execution and turns off the

clocks for:

• almost the entire chip, but RTC, or

• the entire chip.

The whole clock system is stopped.

Refer to register SYSCON 1.

• All enabled external

interrupts

• NMI

• RTC

timer

(in

asynchronous mode)

• PEC requests

• ASC interface

• SSC interface

Power

down

mode

The program stops execution (instruction

• Reset

PWRDN) and turns off the clocks for the CPU

and for all peripherals; ports optionally.

Note: Peripherals Management enables the user to control (via software) the clock of

selected peripherals. Refer to register SYSCON 3.

C161U power requirement in individual modes is described in DC Characteristics,

Table 94

Data Sheet

13

2001-04-19

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