TC1115 Datasheet, PDF (64/103 Pages) Infineon Technologies AG – 32-Bit Single-Chip Microcontroller Advance Information

TC1115
Advance Information
Functional Description
3.20
Power Management System
The TC1115 power management system allows software to configure the various
processing units to adjust automatically in order 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 3-4 describes the features of the power management modes.
Table 3-4 Power Management Mode Summary
Mode
Run
Idle
Sleep
Deep Sleep
Description
The system is fully operational. All clocks and peripherals are enabled,
as determined by software.
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.
The system clock continues to be distributed only to those peripherals
programmed to operate in sleep mode. The other peripheral modules will
be shut down by the suspend signal. 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.
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).
Besides these explicit software-controlled power-saving modes, special attention has
been paid in the TC1115 to automatic power-saving in operating units that are currently
not required or idle. In this case, they are shut off automatically until their operation is
required again.
Data Sheet
58
V1.0, 2005-02