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MCP2120/MCP2150 Developer’s Kit User’s Guide
1.3.7
Selecting UART Source and Optical Transceiver Interface
Figure 1-8 shows two sets of jumpers used to route signals to and from the MCP2150.
Jumpers J2, J3 and J4 are used to determine the source of the signals used by the
UART interface. When the header has the pins closest to the “DB9” label jumpered to
the center pin, the DB9 is the source of the UART signal. When the header has the pins
closest to the “Header” label jumpered to the center pin, the four-pin header is the
source of the UART signal.
Jumpers J7 and J8 are used to determine the source and destination of the IrDA sig-
nals used by the interface between the MCP2150 and Optical Transceiver. When the
header has the pins closest to the “Integrated Transceiver” label jumpered to the center
pin, the integrated transceiver is used. When the header has the pins closest to the
“Component Transceiver” label jumpered to the center pin, the component transceiver
logic is used.
FIGURE 1-8:
MCP2150 SELECTING SOURCES
BT1
C8
Power
D3
R7
C5
R8
R9
D2 D5
R1
U5
C17
C7
C11
U3
D4
U2
Y1
R2 JP3
U4
R5 R6 C13
D1
J6
CR1
(MCP2150)
Open=Enabled Component
R14
C15
C16
C12
R4 R3
Transceiver
J7 J8
R10
D6
JP2 JP1
C1
C4 C2
CD
Integrated
U6
C3
C10
U1
D7
JP2 JP1
0 0
0 1
1 0
1 1
BAUD
9600
19200
57600
115200
Transceiver
R11 R13 C16
J5
J4
J3
MCP2150 Dev Board
02-01609 Rev. 1
J2
J1
+5VGND
These three jumpers select the
source of the Host signals.
J2, J3 and J4
These two jumpers select the
optical transceiver logic. Both jumpers
should connect the same pin positions
J7 and J8
Header is source.
Component Transceiver
DS51246C-page 14
DB9 is source.
Integrated Transceiver
? 2005 Microchip Technology Inc.
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