MCP2140-IP datasheet(20/58 Pages) MICROCHIP

Part #	MCP2140-IP

Description	IrDA짰 Standard Protocol Stack Controller With Fixed 9600 Baud Communication Rate

PDF	58 Pages

Scroll/Zoom	100%

Manufacturer	MICROCHIP [Microchip Technology]

Direct Link	http://www.microchip.com

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20 / 58 page

MCP2140

DS21790A-page 20

Preliminary

 2003 Microchip Technology Inc.

FIGURE 2-13:

HIGH LEVEL MCP2140 CONNECTION SEQUENCE

Normal Disconnect Mode (NDM)

Send XID Commands

(timeslots n, n+1, ...)

No Response

XID Response in timeslot y,

Finish sending XIDs

(max timeslots - y frames)

Broadcast ID

No Response to these XIDs

claiming this timeslot, (MCP214X

No Response to Broadcast ID

Primary Device

MCP2140

Discovery

Normal Response Mode (NRM)

Send SNRM Command

(w/ parameters and

connection address)

Open channel for IAS Queries

Send IAS Queries

Open channel for data

Send Data or Status

Shutdown link

UA response with parameters

using connect address

Confirm channel open for IAS

Provide IAS responses

Confirm channel open for data

Send Data or Status

Confirm shutdown

(back to NDM state)

(approximately 70 ms

between XID commands)

Send Data or Status

(MCP2140 DSR pin driven low)

(Secondary Device)

always claims timeslot 0)

No IR Activity

(for 10 seconds)

PHACT pin driven Low

PHACT pin driven High

No IR Activity

(for 10 seconds)

PHACT pin driven Low

MCP2140-IP Datasheet(PDF) 20 Page - Microchip Technology

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