MCP2120/MCP2150 USER鈥橲 GUIDE
A.4 Jumpers
Jumpers are used to allow the Developer鈥檚 Board to be configured into the
different modes that are possible. These modes include:
鈥?Selection of Baud Rate
鈥?Source of Host signals
鈥?Source of Optical Transceiver signals
鈥?Device Enable signal for power down operation
A.4.1
MCP2120 Developer鈥檚 Board
The MCP2120 Developer鈥檚 Board has the following jumpers:
1. Two jumpers to select source of UART signals. Either RS-232C socket
or the four-pin header.
2. Three jumpers to select desired baud rate.
3. Two jumpers to select IR Transceiver options.
4. Jumper to disable device operation.
5. Jumper for Software Baud control when using RS-232C interface.
Figure A.1: MCP2120 Developer鈥檚 Board Hardware
4
R9
D3
D6 D2
C17
C11
U2
C18
C6
R3
Y1
J5
CR1
D4
C15
C4
C7
C12
C13
C14
JP5 R1
Q1
U3
C9
C5
C1
R14
R2
C2
JP3:JP1
000=F
OSC
/768
001=F
OSC
/384
010=F
OSC
/192
011=F
OSC
/128
100=F
OSC
/64
111=S/W
Baud
Open=0
MODE
RTS
Integrated
Transceiver
R13
C16
U6
C8
C10
R4
JP4
R10
U4
R5
R11
D1
D5
R12
R15
U5
(MCP2120)
Open=Enabled
R8
R7
R6
Component
Transceiver
J7
J6
3
C3
DB9
RX
J2
MCP2120
Developer鈥檚 Board
02-01608 Rev. 1
TX
J4
J1
Header
U1
J3
+5V
GND
5
1
2
DS51246A-page 46
錚?/div>
2001 Microchip Technology Inc.
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