MCP2120 datasheet(49/64 Pages) MICROCHIP

49 / 64 page

 2001 Microchip Technology Inc.

DS51246A-page 45

MCP2120/MCP2150

USER’S GUIDE

Appendix A. Hardware Detail

The MCP2120/MCP2150 Developer’s Board hardware is intended to illustrate

the ease of use of Microchip’s infrared data communication solutions. The

Developer’s Board features the following hardware elements:

A.1 Power Supply

There are three ways to supply power to the MCP2120/MCP2150

Developer’s Board:

• A 9V battery can be plugged into BT1.

• A 9V, 750 mA unregulated AC or DC supply can be plugged into J5.

• A +5V, 750 mA regulated DC supply can be connected to the two pins

provided, labled +5V and GND. A pair of 18” (45 cm) cables are pro-

vided to allow one board to power another.

A.2 Power Indicator

One green LED indicates whether there is power applied to the MCP2120 and

MCP2150 Developer Boards (LED lit) or not (LED off).

A.3 RS-232 Serial Port

A.3.1

MCP2120 Developer’s Board

A MAX232 compatible level shifting IC has been provided with all necessary

hardware to support connection of an RS-232 host through the DB-9

connector. The port can be connected to a PC using a straight through cable.

Refer to the MCP2120 Data Sheet for more information.

A.3.2

MCP2150 Developer’s Board

A MAX3238E compatible level shifting IC has been provided with all

necessary hardware to support connection of a RS-232 host through the

DB-9 connector. The port can be connected to a PC using a straight through

cable. Refer to the MCP2120 Data Sheet (DS21618) for more information.

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