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MCP2120/MCP2150 Developer’s Kit User’s Guide
A.5
JUMPERS
Jumpers are used to allow the Developer ’s Board to be configured into the different
modes that are possible. These modes include:
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Selection of baud rate
Source of host signals
Source of optical transceiver signals
Device enable signal for power down operation
A.5.1
MCP2120 Developer ’s Board
The MCP2120 Developer ’s 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 ’S BOARD HARDWARE
4
R9
D3
D6 D2
U2
C11
R15
C18
C6
R3
J5
C10
U4
R4
D4
C15
CR1
C4
C7
JP4
( MCP2120 )
Open=Enabled
R5
R10 R11
Component
D1
C12
C13
C14
C8
R8
R7
R6
Transceiver
J6 J7
R12
D5
JP5 R1
3
C9
R14
Q1
R2
U3
C2
JP3:JP1
000 =F OSC /768
001 =F OSC /384
Integrated
Transceiver
U6
J2
C5
C1
U1
C3
010 =F OSC /192
011 =F OSC /128
100 =F OSC /64
111 =S/W Baud
Open=0
R13
C16
J4
5
MCP2120 Developer’s Board
02-01608 Rev. 1
1
J1
J3
+5V
2
GND
DS51246C-page 42
? 2005 Microchip Technology Inc.
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