MCP2120 datasheet(39/64 Pages) MICROCHIP

39 / 64 page

 2001 Microchip Technology Inc.

DS51246A-page 35

MCP2120 Tutorial

3.6 Transmitting/Receiving Data

Now both PCs should have their Hyperterminal program running in the

connected mode with the same COM port settings. See Figure 3.9.

Each MCP2120 Developer’s Board should be powered. Use the pair of 18”

(45 cm) power jumper cables to power MCP2120 Developer’s Board #2 from

MCP2120 Developer’s Board #1. Optionally, MCP2120 Developer’s Board #2

could be powered from a 9V battery. When the MCP2120 Developer’s Board

is powered, the green LED (labeled D3) will be on.

Each MCP2120 Developer’s Board should be connected to their respective

PC serial port, so that Hyperterminal can communicate to the board.

The MCP2120 Developer’s Board should be oriented so that the integrated

optical transceivers are aligned with each other (as shown in Figure 3.18). For

the initial communication between the two boards, the MCP2120 Developer’s

Boards should be approximately 6” (15 cm) apart.

Type a string of characters in the Hyperterminal window on PC #1. This same

character sting should appear in the Hyperterminal window of PC #2. Typing a

string of characters in the Hyperterminal window on PC #2 should have the

same character string appear in the Hyperterminal window of PC #1.

Congratulations! You may now start modifying the system to evaluate/test the

operation of the MCP2120 and MCP2120 Developer’s Board.

Figure 3.18: MCP2120 Tutorial System

C15

C12

C13

C14

MCP2120 Developer’s Board

02-01608 Rev. 1

R14

CR1

JP5

R2 C2

+5V

GND

R13

C16

JP3:JP1

000=Fosc/768

001=Fosc/384

010=Fosc/192

011=Fosc/128

100=Fosc/64

111=S/W Baud

Open=0

Integrated

Transceiver

JP4

(MCP2120)

Open=Enabled

D6 D2

C10

R11

R10

Component

Transceiver

R12

C18

R15

C11

To IrDA Developer’s Kit Power Supply (9V)

To PC #1

To PC #2

MCP2120 Developer’s Board #1

MCP2120 Developer’s

Pair of 18” Power Jumper Cables

Board #2

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