Atmel AT91SAM7A3-EK, User Manual

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