External Power Supply Select Jumper (Jp2, Jp3, Jp4, Jp5) - Renesas M3A-HS85 User Manual

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3.2.2 External Power Supply Select Jumper (JP2, JP3, JP4, JP5)

By setting JP2 to JP5, the source of power voltage supplying to A/D reference power supply (AVREF), analog
power supply (AVCC), USB power supply (DrVCC), and system power supply of SH7285 can be switched.
Figure 3.2.3 shows the external power supply select jumper assignments. Table 3.2.2 lists the external power
supply select jumper setting.
Figure 3.2.3 External Power Supply Select Jumper Assignments (JP2,JP3,JP4,JP5)
Table 3.2.2 External Power Supply Select Jumper Setting (JP2,JP3,JP4,JP5)
Jumper
JP2
CPU-VCC SEL
JP3
DrVCC SEL
JP4
AVCCSEL
JP5
AVREFSEL
: Initial Setting
Note: Do not change jumper settings during the operation of M3A-HS85.
Ensure to turn off the power for the M3A-HS85 before changing jumper settings.
Rev.1.04 2008.7.10
REJ10J1564-0104
Top view of the
component side
DrVCC SEL
2 1
JP3
FIX INT
AVCC SEL
AVREF SEL
JP4 JP5
Setting
1-2
SH7285 power supply voltage (VCC) is supplied from J4 or J7
Open External power supply voltage (supplied from J5 or H13)
1-2
SH7285 USB power supply (DrVCC) is supplied from J4 or J7 (via regulator)
Open External power supply voltage (supplied from J6 or H14)
1-2
SH7285 AVCC is connected to 5V fixed power supply voltage.
Open External power supply voltage (supplied from J8 or H8)
1-2
SH7285 AVREF is connected to 5V fixed power supply voltage.
Open External power supply voltage (supplied from J8 or H9)
3.2.2 External Power Supply Select Jumper (JP2, JP3, JP4, JP5)
CPU-VCC SEL
2
JP2
FIX INT
Function
Operational Specifications
1
3-20