DM164130-3【PDF 5/12 页】BOARD DEMO FOR PIC16F/PIC18F

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Driving nanoWatt XLP into Tomorrow’s Vehicles

PIC MCUs with nanoWatt Technology also support up to

nine oscillator modes, which include:

■ ? Ultra Low Power Wake-up (ULPW) mode

– Reduces current draw during wake-up.

■ ? Con?gurable Idle, Sleep and Deep Sleep modes

– Let designers tailor current consumption levels

and clocking options to ?t any power budget.

■ ? Advantageous two-speed start-up feature

– Allows seamless transition by running from either

of the internal oscillators while an external clock

source stabilizes on start-up. After the external

source has stabilized, the MCU automatically

makes a clock switch, saving precious “up” time.

■ ? Clock frequency can be switched on the ?y

With increased electronics penetration across the

broad spectrum of applications within the vehicle, the

number of ECMs continues to expand – taxing the

vehicle's power budget. Some higher end vehicles can

have over 80 ECMs, which means that current loads

are increasing. An increase in battery size to support

the growing power requirements is an alternative to

overcoming this challenge. However, larger batteries do

not always provide a good tradeoff in an environment

where space is limited and weight is critical, due to the

negative impact on fuel consumption.

A better alternative is to use nanoWatt XLP, Microchip's

innovative solution to address the operational power

consumption of the ECMs. Through a unique blend of

design techniques, ?exible power management features

and process technology, nanoWatt XLP technology

allows engineers to manage static, active and average

power consumption.

In those ECMs which consume power when the ignition

is off, using nanoWatt XLP-based PIC microcontrollers,

with industry leading low sleep currents, gives the

system designer the abilty to tackle the power budget

challenges.

– Allowing no delay in code execution on transitions

between external clocks and the internal

oscillators.

Low Power Safety

In addition to peripherals, products with nanoWatt XLP

have system supervisory circuits specially designed for

battery powered products.

■ The Deep Sleep Brown-out Reset protects

applications when batteries are depleted and

changed, yet consumes a tiny 45 nA of current

■ The Real-time Clock Calendar module on products

with Deep Sleep can continue to run provide precise

time for less than 500 nA

■ Using a dedicated on-chip oscillator, the standard

WDT and Deep Sleep WDT provide protection against

system failure for less than 500 nA.

Bene?ts of nanoWatt XLP Technology:

■ Sleep currents down to 20 nA

■ Brown-out Reset down to 45 nA

■ Watch-dog Timer down to 400 nA

■ ? Real-time Clock/Calendar down to 500 nA

www.microchip.com/XLP

5

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