MCP2502X datasheet(2/66 Pages) MICROCHIP

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MCP2502X/5X

DS21664D-page 2

Package Types

Definition of Terms

The

following

terms

are

used

throughout

this

document:

I/O Expander - refers to the integrated circuit (IC)

device being described (MCP2502X/5X).

Input Message - term given to messages that are

received by the MCP2502X/5X and cause the internal

registers to be modified. Once the register modification

has been performed, the MCP2502X/5X transmits a

Command Acknowledge message to indicate that the

command was received and processed.

Command Acknowledge Message - term given to the

message that is automatically transmitted by the

MCP2502X/5X after receiving and processing an input

message.

Information Request Message - term given to

Remote Request messages that are received by the

MCP2502X/5X that subsequently generate an output

message (data frame) in response.

Output Message - term given to the message that the

MCP2502X/5X sends in response to an Information

Request message.

On Bus Message - term given to the message that the

MCP2502X/5X transmits after completing the power-on/

self-configuration

sequence

timed

intervals,

enabled.

Self-Configuration - term used to describe the

process of transferring the contents of the EPROM

memory array to the SRAM memory array.

On Bus - term used to describe the condition when the

MCP2502X/5X

fully-configured

and

ready

transmit, or receive, on the bus. This is the only state in

which the MCP2502X/5X can transmit on the bus.

Edge Detection - refers to the MCP2502X/5X’s ability

to automatically transmit a message based upon the

occurance of a predefined edge on any digital input.

Threshold Detection - refers to the MCP2502X/5X’s

ability to automatically transmit a message when a

predefined analog threshold is reached.

GP0/AN0

GP1/AN1

VDD

TXCAN/TXRXCAN*

RXCAN/NC*

GP5/VREF+

GP4/VREF-

GP6/CLKOUT

GP3/AN3/PWM2

OSC1/CLKIN

GP2/AN2/PWM1

OSC2

VSS

GP7/RST/VPP

PDIP/SOIC

* One-wire option available on MCP250X5 devices.

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