Overview
Description
The RX631 microcontrollers come in a comprehensive memory vs. package lineup to suit your system scale. In addition to standard functions such as 12-bit A/D converter, motor control timers, SCI, RSPI, I²C, CAN, and safety features, connectivity functions such as Ethernet and USB host have been enhanced. The lineup also includes products possessing specialized functions, such as sensing/image display using a CMOS camera, or security (hardware AES encryption). Products that support high-temperature (105 °C) operation are also available.
Comparison
Applications
Design & Development
Software & Tools
Software Downloads
Sample Code
Boards & Kits
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.

Support
Support Communities
Support Communities
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RX631 SCI Async Max BR
Hi guys! I use an RX631 and I need to know what's the max usable bitrate on SCI in Async mode. In the manual I found that information:Table 35.13 Maximum Bit Rate for Each Operating Frequency (Asynchronous Mode) PCLK (MHz) Maximum Bit Rate (bps) n N ... 50 ...
Jul 23, 2014 -
Where/When can we order RX631R5F5631ADDFC (LQFP-176 package)?
We have been using your RX series for years and now we simply can't find it anywhere. I tried your CA sale offices but no one will take my call Are you still making these micros? because if not, I will have no choice but bite the bullet and ...
Dec 21, 2022 -
RX631 Flashing using flash programmer corrupts data flash
Hello, I am trying to use the Renesas Flash Programmer V3.05.01 to program the user boot area. I have the Code flash1 and the Data flash1 area unchecked in the block setting tab for Erase. The Erase option in Operation setting is set to 'Erase Selected Blocks'. However ...
Mar 12, 2019
FAQs
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(RX630, RX63N, RX631, RX210, RX220, X110, RX111) What types of resonator can be connected and what can you recommend?
ceramic resonator or a crystal resonator can be used for the main clock oscillator. Please use a crystal resonator for the sub-clock oscillator. There are no particular resonators that we recommend.
Aug 10, 2012 -
(RX630,RX63N, RX631) What is "On-chip ROM (program ROM) (write only)" in the manual?
When programming or erasing ROM, a different address from the address for executing software is specified. "On-chip ROM (program ROM) (write only)" is the virtual area of the address specified at this time. For erasing on-chip ROM, or reading after programming, specify the "on-chip ROM (program ROM ...
Jan 23, 2014 -
(RX630, RX63N, RX631, RX63T, RX210, RX220) I can't enter all-module stop mode.
To enter all-module stop more, execute a WAIT instruction after setting the related registers or bits as follows. - MSTPCRA.ACSE bit = 1 (all-module clock stop mode is enabled) - SBYCR.SSBY bit = 0 (shifts to sleep mode or all-module clock stop mode after the WAIT instruction is executed ...
Jun 20, 2013