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MCP2120 Datasheet(PDF) 41 Page - Microchip Technology

Part # MCP2120
Description  DEVELOPER?셎 KIT USER?셎 GUIDE
PDF  64 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP2120 Datasheet(HTML) 41 Page - Microchip Technology

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 2001 Microchip Technology Inc.
DS51246A-page 37
MCP2120 Tutorial
Figure 3.19: Debug Flowchart - MCP2120 Developer’s Board #1 Side
Set up digital oscilloscope to
capture waveform on first
falling edge (Start bit)
Debug Board #1
Type character in PC #1
Hyperterminal window
Data
appear on
Yes
No
MCP2120
TX pin?
Data
appear on
Yes
No
MCP2120
TXIR pin?
Goto
Debug Board #2
Problem with MCP2120
Verify device has power/ground
Try replacing with new MCP2120
Data
appear on
Yes
No
MAX232
R1IN pin?
Data
appear on
Yes
No
MAX232
R1OUT
Verify 3 pin header J4
is jumpered correctly
Verify that the connection from
PC #1 to Board #1 is good.
Try communication with
another serial device
(such as PICSTART Plus).
Ensure jumper JP4 is open
Ensure crystal oscillator is correct
frequency and operating
Ensure Baud Rate is correct
(jumpers JP1, JP2, and JP3)
MAX232 device
It appears that the
is damaged
pin?



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