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Section 4
Configuration Straps
4.1
Configuration
Straps
Table 4-1. Configuration Jumpers and Straps
Default
Designation
Setting
Feature
J13
Closed
VDD3V3 Jumper
(1)
J14
J15
J16
J17
J18
J19
J20
J21
J22
J23
J24
J25
J26
AT91SAM7A3-EK Evaluation Board User Guide
Closed
Closed
2-3
1-2
Closed
Closed
Open
Closed
Closed
Opened
Opened
Opened
Opened
VDDPLL Jumper (1)
VDDANA Jumper (1)
VDDBU Jumper select (1)
1-2 : Optional Lithium Thionyl Chloride 3.6V Backup
Battery
2-3 : 3.3V power
ADVREFP Jumper select (1)
1-2 : 3.00V Voltage reference
2-3 : VDDANA
Enables 120 ohms CAN bus resistance termination
(CAN0)
Enables 5V power supply for TJA1050 Transceiver. It is
closed by wire on solder side. J19 and J20 should not be
closed at the same time.
Disables 3.3V power supply for TJA1050 Transceiver. J20
and J19 should not be closed at the same time.
Enables 120 ohms CAN bus resistance termination
(CAN1)
Enables 5V power supply for TJA1050 Transceiver. It is
closed by wire on solder side. J22 and J23 should not be
closed at the same time.
Disables 3.3V power supply for TJA1050 Transceiver. J23
and J22 should not be closed at the same time.
Do not use: Factory test mode
Select ICE mode or JTAG mode (Closed)
External XIN clock input. S8 and S9 must be open.
4-1
6165C–ATARM–26-Jun-06
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