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UM0843 Datasheet(PDF) 17 Page - STMicroelectronics

Part # UM0843
Description  EVALSPEAr310 - evaluation board for the SPEAr310
PDF  48 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

UM0843 Datasheet(HTML) 17 Page - STMicroelectronics

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UM0843
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Doc ID16543 Rev 2
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The other option is to use the external clock signals, it is necessary to remove jumpers on
J65,J66,J62,J63, and then plug the related clock signals cables to connectors: JP65,JP66,
JP67, JP62,JP63,JP64.
By default the external clock configuration of HDLC-RS485-1 is selected as shown in
Table 11.
By default the external clock configuration of HDLC-RS485-2 is selected as shown in
Table 12.
Table 10.
HDLC-RS485-2 on-board clock jumpers
Jumper
Description
Configuration
JP62
Supply on-board clocks or
external clocks to CPU for
HDLC-RS485-2 TCLK.
(Default - fitted) to use on board
clocks (PIN-1)
JP63
Supply on-board clocks or
external clocks to CPU for
HDLC-RS485-2 RCLK.
(Default - fitted) to use on board
clocks (PIN-1)
Table 11.
HDLC-RS485-1 external clock jumper settings
Jumper
Description
Configuration
JP65
Supply on-board clocks or
external clocks to CPU for
HDLC-RS485-1 TCLK.
Setting: to use external clocks
(PIN-2)
JP66
Supply on-board clocks or
external clocks to CPU for
HDLC-RS485-1 RCLK.
Setting: to use external clocks
(PIN-2)
JP67
Signal Ground
12
12
TCLK
RCLK
GND
12



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