Datasheet

RSKRX210 6. Configuration
R20UT0302EG0200 Rev. 2.00 Page 26 of 41
Jul 09, 2012
6.9 Power Supply Configuration
Table 6-8 below details the function of the option links associated with power supply configuration.
Reference Link Fitted Configuration Link Removed Configuration Related Ref.
R68
Bypasses current measurement
jumper J14.
Allows the current consumption of the
MCU to be measured across J14.
J14
R76 Connects CON_5V
to the power
socket, via R102.
Disconnects CON_5V from the power
socket (PWR pin).
R83, R102
R83 Connects 5V to the power socket, via
R102.
Disconnects 5V from the power
socket (PWR pin).
R76, R102
R102 Connects the power socket (PWR pin)
to the voltage regulator (U11, pin 3).
Connects the Power socket (PWR
pin) from the voltage regulator (U11,
pin 3).
-
R302 Connects CON_3V3 to J17, pin 2. Disconnects CON_3V3 from J17,
pin 2.
R359
R359 Connects the voltage regulator output
(U11, pin 2) to Board_VCC (bypassing
J17).
Disconnects the voltage regulator
output (U11, pin
2) from
Board_VCC (still connectable via
J17).
J17
Table 6-8: Power Supply Option Links
Table 6-9 below details the function of the jumpers associated with power supply configuration.
Reference
Position One
Position Two
Position Three
Related Ref.
J15* All pins open. The
voltage regulator U11 is
set to supply
Board_VCC with 3.3V.
All pins closed. The voltage
regulator U11 is set to
supply Board_VCC with
1.62V.**
n/a -
J17
All pins open. Disconnects
Board_VCC from the
voltage regulator U11.
(bypassed by R359 when
fitted, unfitted by default)
Pins 1 and 2 connected.
The voltage regulator U11
is bypassed, and
B
oard_VCC is supplied
directly from the power
socket (5V).
Pins 2 and 3
connected.
Board_VCC is
connected to the
voltage regulator U11,
supplying either 3.3V
or 1.62V.
-
Table 6-9: Power Supply Jumpers
* By default, this jumper is not fitted to the RSK. The default position is therefore all pins open.
** This option will disable the debug LCD. Refer to the power supply section, §2, for further information.