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MCP2120 Datasheet(PDF) 26 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) 26 Page - Microchip Technology

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MCP2120/MCP2150 USER’S GUIDE
DS51246A-page 22
 2001 Microchip Technology Inc.
3.4 Hardware Setup
3.4.1.
Oscillator
The crystal oscillator has pin receptacles to allow the changing of the
MCP2120 oscillator frequency. For the tutorial, we will be using a crystal
frequency of 7.3728 MHz. This crystal frequency is shipped in the kit.
3.4.2.
Board Jumpers
The MCP2120 and MCP2150 Developer’s Boards may use one of two host
interfaces, the DB-9 interface to connect to a PC, or the header to connect to
a controller board.
For the tutorial, the host signal will come from the DB-9 connector and the
infrared data signals will interface to the Integrated Optical Transceiver.
Figure 3.2 shows how the two 3-pin jumpers need to be connected for this
configuration.
Figure 3.2: MCP2120 Developer’s Board Component Layout
J5
D4
C15
C12
C13
C14
C9
C5
C1
J2
MCP2120 Developer’s Board
02-01608 Rev. 1
U1
J1
J4
R14
CR1
C4
C7
C8
R1
Q1
JP5
U3
R2
C2
C3
J3
+5V
GND
R13
C16
JP3:JP1
000
=FOSC/768
001
=FOSC/384
010
=FOSC/192
011
=FOSC/128
100
=FOSC/64
111
=S/W Baud
Open=0
Integrated
Transceiver
U6
R8
R7
R6
R4
JP4
(MCP2120)
Open=Enabled
R9
D3
D6 D2
U2
C6
R3
C10
U4
R5
R11
R10
Component
Transceiver
J7
J6
R12
D1
D5
C18
R15
C11
These two jumpers select the
source of the Host signals.
DB9 is source.
J1 and J4
These two jumpers select the
optical transceiver logic. Both jumpers
Integrated Transceiver
J6 and J7
should connect the same pin positions



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