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MCP2120 Datasheet(PDF) 15 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) 15 Page - Microchip Technology

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 2001 Microchip Technology Inc.
DS51246A-page 11
Getting Started
2.3.1.4
Disabling the MCP2120
Figure 2.5 shows the jumper, JP4, which will enable or disable the MCP2120
device. When the MCP2120 is disabled, the device will consume less current.
Figure 2.5: MCP2120 Enable/Disable
In most cases, this jumper will be open. It may be closed to test system
operation when the MCP2120 is disabled. The Host Controller board may
control the operation of the MCP2120 by connecting a signal to the JP4
header as shown in Figure 2.6.
Figure 2.6: Host Controller Disabling the MCP2120
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
MCP2120 Enable/Disable
Disabled
Enabled
JP4
MCP2120
EN
I/O Pin
MCP2120 Developer’s Board
Host Controller
(High or Hi Impedance = Enabled
Low = Disabled)



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