V850E2/Fx4 Application Board User's Manual
supply voltages required for the integrated circuits. If desired, connector CN7 and/or connector
CN8 can be used to supply the IC voltage rails directly.
In order to achieve LIN or FlexRay bus communication it is necessary to supply VBAT. This
supply is used directly by the LIN and FlexRay transceivers, and can be used to generate the 5
volt supply voltage required by the FlexRay transceiver.
In order to achieve CAN bus communication, the 5 volt supply voltage required by the CAN
transceiver can either be directly supplied to the board using connectors CN7 or CN8, or it can be
generated from VBAT, which is supplied to the board using connectors CN5 or CN6.
Caution: The voltage rails provided by connectors CN7 and CN8 are not regulated and can
be directly supplied to the integrated circuits. Damage may occur if a voltage
greater than that described in Table 2 is supplied.
Connector Description
Rail
Input Voltage
Range
CN5
DC Power Jack ID=2.1mm, center positive
+9v to +15v
CN6 Red
Banana
Jack
Ext_VBAT
+9v to +15v
CN7
Red Banana Jack
Ext_VDD1
+3v to +5.5v
CN8 Red
Banana
Jack
Ext_VDD2
+3v to +5.5v or
+1.0v to +1.3v
CN9
Black Banana Jack
GND
0v
Table 2.
Power Supply Connectors
4.2 Voltage Regulators
Three on board voltage regulators are provided to regulate the external DC input voltage
(Ext_VBAT) to the levels required for the integrated circuits. The voltage level of regulator outputs
1 and 2 are selectable. These regulators can be used to supply the I/O and core voltages to the
microcontroller. The output of the third regulator is fixed at 5 volts, and is used to supply the
necessary 5 volt rail to the CAN and FlexRay transceivers in the functional areas.
Component
Regulator Output
Jumper
Setting
Output Level
open 5
volts
VReg output 1 (Reg_VDD1)
J1
closed 3.3
volts
open 5
volts
1 – 2
3.3 volts
IC1
VReg output 2 (Reg_VDD2)
J9
1 – 2 and 3 – 4
1.2 volts
IC2, IC3
VReg 5 volt output (Reg_VDD5V)
–
–
5 volts
Table 3.
Voltage Regulators
R20UT0009EU0103 Rev.1.03
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May 21, 2012