Renesas RX23T Series, User Manual

Page: 23 / 41

RSKRX23T 6. Configuration
R20UT3318EG0100
Rev.
1.00
Page 22 of 40
Aug 24, 2015
6. Configuration
6.1 Modifying the RSK
This section lists the option links that are used to modify the way RSK operates in order to access different
configurations. Configurations are made by modifying link resistors or headers with movable jumpers or by
configuration DIP switches
A link resistor is a 0Ω surface mount resistor, which is used to connect or isolate parts of a circuit. Option links
are listed in the following sections, detailing their function when fitted or removed.
Bold, blue text indicates
the default configuration that the RSK is supplied with. Refer to the component placement diagram (§3) to
locate the option links, jumpers and DIP switches.
When removing soldered components, always ensure that the RSK is not exposed to a soldering iron for intervals
greater than 5 seconds. This is to avoid damage to nearby components mounted on the board.
When modifying a link resistor, always check the related option links to ensure there is no possible signal contention or
short circuits. Because many of the MCU’s pins are multiplexed, some of the peripherals must be used exclusively.
Refer to the RX23T Group Hardware Manual and RSKRX23T schematics for further information.
6.2 MCU Operating Modes
Table 6-1 below details the option links associated with configuring the MCU operating modes.
Reference
Link Fitted Configuration Link Removed Configuration Related Ref.
J8
Boot Mode (SCI) Single Chip Mode
-
Table 6-1: MCU Option Links
6.3 Power Supply Configuration
Table 6-2 and Table 6-3 below details the function of the option links associated with power supply
configuration.
Reference Jumper Position Explanation Related Ref.
J6 *
1
Shorted Pin1-2 Connect Power rail via regulator. R139*
1
Shorted Pin2-3 Direct connect Power rail. R139*
1
All open In case of fitted R139*
1
, same as “Jumper J6 shorted Pin1-2”. R139*
1
J7 *
2
Shorted Connect Power rail. R140
Open Enable current probe for MCU current consumption. R140
Table 6-2: Power Supply Option Links (1)
*
1
: By default, jumper J6 is not fitted to the RSK. R139 is fitted by default and becomes the same setting as
‘Connect Power rail via regulator’.
*
2
: By default, jumper J7 is not fitted to the RSK. R140 is fitted by default and becomes the same setting as
‘Connect Power rail.
Items shown in
bold are the Fit / Do Not Fit (DNF) default configuration that the RSK is supplied with.