参数资料
型号: DM163008
厂商: Microchip Technology
文件页数: 37/54页
文件大小: 0K
描述: KIT MCP2120/2150 FOR IRDA COMM
标准包装: 1
MCP2120 Tutorial
FIGURE 2-19:
DEBUG FLOWCHART – MCP2120 DEVELOPER ’S BOARD
#1 SIDE
Debug Board #1
Set up digital oscilloscope to
capture waveform on first
falling edge (Start bit)
Type character in PC #1
Hyperterminal ? window
Data
appear on
No
MCP2120
TX pin?
Data
Yes
Data
appear on
MAX232
R1IN pin?
No
No
appear on
MCP2120
TXIR pin?
Verify that the connection from
PC #1 to Board #1 is good.
Yes
Goto
Debug Board #2
Problem with MCP2120
Verify device has power/ground
Ensure jumper JP4 is open
Ensure crystal oscillator is correct
frequency and operating
Ensure Baud Rate is correct
(jumpers JP1, JP2 and JP3)
Try replacing with new MCP2120
Yes
Data
appear on
MAX232
R1OUT
pin?
Yes
Try communication with
another serial device
(such as PICSTART ? Plus).
No
? 2005 Microchip Technology Inc.
Verify 3 pin header J4
is jumpered correctly
It appears that the
MAX232 device
is damaged
DS51246C-page 33
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