Power-Down Mode and Its Impact on Energy Savings
* Question
What power saving modes are supported by LPC2114/2124/2210/2220/2212/2214 microcontrollers?
* Answer
The LPC2114/2124/2210/2220/2212/2214 microcontrollers, based on the ARM7TDMI-S core, support a power-down mode to minimize energy consumption during periods of inactivity.
1. Idle Mode
In this mode, the CPU clock is stopped while peripheral functions and interrupt logic remain active.
Advantage: allows peripherals (timers, UARTs, etc.) to continue operating while reducing core power usage.
Typical use: when the processor is waiting for external events or peripheral activity.
2. Power-Down Mode
In this deeper sleep mode, both the CPU and peripheral clocks are stopped.
The on-chip oscillator is disabled, dramatically lowering power consumption.
Wake-up is possible via external interrupts or reset.
Typical use: when the system can remain inactive for extended periods.
Summary
The LPC2114/2124/2210/2220/2212/2214 microcontrollers support Idle Mode and Power-Down Mode as their two main power-saving states. Together, they provide flexibility between maintaining peripheral activity and achieving maximum energy reduction.