AN754 datasheet(10/13 Pages) MICROCHIP

Part #	AN754

Description	Understanding Microchip?셲 CAN Module Bit Timing

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Manufacturer	MICROCHIP [Microchip Technology]

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AN754

DS00754A-page 10

 2001 Microchip Technology Inc.

DEFINITION OF TERMS

Dominant bit - Logic 0, overrides a recessive bit during

arbitration.

Recessive bit - Logic 1.

CAN Node - A point in the network where CAN commu-

nications is connected.

Nominal Bit Time (NBT) - The length of a transmitted bit

by an ideal transmitter with no resynchronization.

CAN - Controller Area Network.

Nominal Bit Rate (NBR) - The number of bits per sec-

ond transmitted by an ideal transmitter.

Propagation Delay - Signals round trip time on the

physical bus.

Hard Synchronization - Resets the receiving nodes bit

timers. Occurs only at Start Of Frame (SOF).

Resynchronization - Maintains synchronization by

adjusting the bits as needed.

Information Processing Time (IPT) - The time required

to determine the bit level. Begins at the sample point.

Start Of Frame (SOF) - The first dominate bit during

bus idle. Indicates a start of frame.

Sample Point - Position within the bit where the logic

level is sampled.

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