MC68HC908AP16CFB datasheet(32/440 Pages) MOTOROLA

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General Description

Data Sheet

MC68HC908AP Family — Rev. 2.5

MOTOROLA

1.6 Power Supply Bypassing (VDD, VDDA, VSS, VSSA)

VDD and VSS are the power supply and ground pins, the MCU operates

from a single power supply together with an on chip voltage regulator.

Fast signal transitions on MCU pins place high. short-duration current

demands on the power supply. To prevent noise problems, take special

care to provide power supply bypassing at the MCU as Figure 1-5

shows. Place the bypass capacitors as close to the MCU power pins as

possible. Use high-frequency-response ceramic capacitor for CBYPASS,

CBULK are optional bulk current bypass capacitors for use in applications

that require the port pins to source high current level.

VDDA and VSSA are the power supply and ground pins for the analog

circuits of the MCU. These pins should be decoupled as per the digital

power supply pins.

Figure 1-5. Power Supply Bypassing

MCU

VDD

C2(a)

C1(a)

0.1

µF

VSS

VDD

NOTE: Component values shown represent typical applications.

VDD

C2(b)

C1(b)

0.1

µF

VSSA

VDDA

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

MC68HC908AP16CFB Datasheet(PDF) 32 Page - Motorola, Inc