PXD20 datasheet(8/130 Pages) FREESCALE

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Overview

PXD20 Microcontroller Data Sheet, Rev. 2

Preliminary—Subject to Change Without Notice

Freescale Semiconductor

Additional notes on low power operation:

•

Fast wake-up using the on-chip 16 MHz internal RC oscillator allows rapid execution from RAM on exit from low

power modes

•

The 16 MHz internal RC oscillator supports low speed code execution and clocking of peripherals when it is selected

as the system clock and can also be used as the PLL input clock source to provide fast start-up without the external

oscillator delay

•

The device includes an internal voltage regulator that includes the following features:

Table 2. Operating mode summary1

Table Key:

On—Powered and clocked

OP—Optionally configurable to be enabled or disabled (clock gated)

CG—Clock Gated, Powered but clock stopped

Off-—Powered off and clock gated

FP—VREG Full Performance mode

LP—VREG Low Power mode, reduced output capability of VREG but lower power consumption

Var—Variable duration, based on the required reconfiguration and execution clock speed

BAM—Boot Assist Module Software and Hardware used for device start-up and configuration

SoC features

Clock sources

Wake-up time2

A high level summary of some key durations that need to be considered when recovering from low power modes. This

does not account for all durations at wake up. Other delays will be necessary to consider including, but not limited to the

external supply start-up time.

IRC Wake-up time must not be added to the overall wake-up time as it starts in parallel with the VREG.

All other wake-up times must be added to determine the total start-up time.

RUN

Either 64 KB or 8 KB available.

—

HALT

—

TBD

STOP

CG CG

LP 350 µs 4 µs 20 µs 1 ms 200 µs

—

24 µs

STANDBY

Off

64 KB of the RAM contents is retained, but not accessible in STANDBY mode.

Off

LP 350 µs 8 µs 100 µs 1 ms 200 µs Var 28 µs

Off

8 KB of the RAM contents is retained, but not accessible in STANDBY mode.

Off

LP 200 µs 8 µs 100 µs 1 ms 200 µs Var 28 µs

POR

500 µs 8 µs 100 µs 1 ms 200 µs

BAM

Dependent on boot option after reset.

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