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The device provides two power saving modes of operation for applications where power consumption is critical for Dump MCU P89LPC952 Flash Data Out. The two modes are idle and Power-down, see below Table.

Idle mode is entered setting the IDL bit in the PCON register. In idle mode, the program counter (PC) is stopped. The system clock continues to run and all interrupts and peripherals remain active. The on-chip RAM and the special function registers hold their data during this mode in order to ease the process of Reading Philip P89C54 MCU Protected Program.

The device exits idle mode through either a system interrupt or a hardware reset. Exiting idle mode via system interrupt, the start of the interrupt clears the IDL bit and exits idle mode.

After exit the Interrupt Service Routine, the interrupted program resumes execution beginning at the instruction immediately following the instruction which invoked the idle mode. A hardware reset starts the device similar to a power-on reset.

Dump MCU P89LPC952 Flash Data out

The Power-down mode is entered by setting the PD bit in the PCON register. In the Power-down mode, the clock is stopped and external interrupts are active for level sensitive interrupts only. SRAM contents are retained during Power-down, the minimum V_DD level is 2.0 V.

The device exits Power-down mode through either an enabled external level sensitive interrupt or a hardware reset. The start of the interrupt clears the PD bit and exits Power-down from Dump MCU P89LPC952 Flash Data Out . Holding the external interrupt pin low restarts the oscillator, the signal must hold low at least 1024 clock cycles before bringing back high to complete the exit of NXP Microprocessor P87C557 Protected Flash Cloning.

Upon interrupt signal restored to logic V_IH, the interrupt service routine program execution resumes beginning at the instruction immediately following the instruction which invoked Power-down mode. A hardware reset starts the device similar to power-on reset.