HC08KL8GRSSLASHD datasheet(30/256 Pages) NXP

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General Description

General Release Specification

MC68HC08KL8 — Rev. 2.0

General Description

1.5.1 Power Supply Pins (VDDREG, VSSREG, VDD1, VSS1, VDD2, and VSS2)

VDDREG and VSSREG are the power supply and ground pins used by the

on-board regulator. In regulator bypass, these become the supply pins

for the USB transceiver.

VDD1,VSS1,VDD2, and VSS2 are the power supply and ground pins. The

MCU operates from a single power supply.

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 1-4

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

possible. Use high-frequency-response ceramic capacitors for CBypass.

CBulk are optional bulk current bypass capacitors for use in applications

that require the port pins to source high current levels.

Figure 1-4. Power Supply Bypassing

MCU

VDD

CBulk

CBypass

0.1

µF

VSSREG,VSS1, VSS2

NOTE: Component values shown represent typical applications.

VDDREG, VDD1, VDD2

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

HC08KL8GRS/D Datasheet(PDF) 30 Page - NXP Semiconductors