Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [renesas]

Anything related to Renesas components or technology. Renesas are a major manufacturer of micro-controllers and flash memory parts, as well as analogue and mixed signal components.

Renesas is a Japanese semiconductor manufacturer head-quartered in Tokyo. It is one of the world's largest makers of semiconductor systems for mobile phones and automotive applications, including micro-controllers. It also makes LCD drivers, RF ICs, mixed-signal integrated circuits and system on a chip semiconductors.

It is a spin off from Hitachi and Mitsubushi component divisions and it merged with NEC in 2010 and the product portfolio includes components that were originally manufactured by all three companies.

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Confusion about USA export restriction regarding electronics

I am an electronic hobbyist based in Canada. Recently I bought different Microcontroller development boards from Mouser.ca This is mostly to satisfy my curiosity and to try out the different features offered by different companies and/or different…
Lexx32117
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8GB SD cards intermittently overwriting data

I have inherited a custom embedded device which uses an Renesas H8S MCU to store data on an SD card. It does this directly with no filesystem implementing SPI at a low level in firmware written in assembler. The original (MMC, pre SPI) version…
scipilot
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What is the purpose of this circuit that is part of a Renesas RX231 programming interface?

I traced a IO-Link USB master PCB to understand how it works. The ciruit I found makes sense to me except for a part of the programming interface. It's marked red in the following schematic. (TXDA is connected to a different IC, a CCE4510 IO-Link…
nanash1
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Why is the time lagging behind on the Renesas ISL1208 real time clock (RTC) in battery mode?

For a project I am using the ST M41T81 RTC but because of the parts shortage, I updated the firmware to support both the M41T81 and LS1208 RTC chips. The reason I am using the LS1208 is because the pins on the IC line up and do the tasks I need it…
ChassakAPT
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Is eXecute In Place dependent on the flash chip?

We are looking at implementing an architecture that makes use of eXecute In Place (XIP) over QSPI in order to overcome storage constraints; our firmware has grown too large to live in the on-chip storage. There is some belief that being able to use…
asafreedman
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Renesas CS+ for CC vs for CA, CX vs e2 studio

I just get started with renesas MCU: RL78 - D1A – R5F10DPJJFB. I went to Renesas website and saw different IDEs: CS+ for CC, CS+ for CA, CX, e2 studio so I would like to ask what is the differences between them? Pros and cons of each IDE and which…
mihota
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Detecting a disconnected analog input

I am working with ADC on MCU SH7147 (Renesas). I have a problem with a sensor as outlined below. How do I detect a disconnect of the sensor cable on the analog input pin on the MCU? I tried to check it by cutting the the wire and seeing the analog…
Nguyen van sy
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Renesas RL78 SPI Baudrate Change

I am using an Renesas RL78 and SPI to communicated with an SD card. I have the driver working using the single command Baudrate of 400kBaud when sending both commands and data. Of course, this is very slow for data transfer, so I have implemented a…
Ed King
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Using a Renesas evaluation board as a Programmer

I am new to using renesas microcontrollers, and could use some advice from someone with experience using them. I found this rl78 evaluation board and a quick reading of the product description on the renesas website mentions that "It has a built-in…
Aditya Rajendran
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Renesas Compiler: KPIT vs GCC-Renesas (CyberThor)

When looking around at Renesas (RL78) compilers, I noticed GCC mentioned a decent amount, but the links are different. Many of the older (<= 2015) URLs point to an India company, KPIT, and is mentioned in a Renesas press release. That website…
ahogen
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How to handle moving time window event in an embedded software

Edit3: As requested I'm going to be more specific about my issue, previous description is still below A motor must not be activate more than MAX_TIME hours (20hours - consecutive or not) during a sliding time window of WINDOW_TIME hours…
Asmature
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How to generate .ruc file?

I am using RA2A1 MCU for my product and want to use UNIQUE ID code for security purpose and restrict the debugging without ID code. While flashing from Renesas Flash Programmer (RFP-3.09.01) we required to provide security key which should be store…
shadab
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Minimal Connections to Program Renesas RE01

I'm trying to program a R7F0E01182DNG#AA0 MCU, using the serial programming feature. It's not working, so as part of troubleshooting I'm paring my design down to the minimum functional circuit. This is what I have: Can someone familiar with these…
Drew
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Adjusting Shunt Resistor Value

I am designing a DC-DC Buck converter using the ISL81806 I would like to use a sub-milliohm current sense resistor (0.2 milliohm) to set the current limit although it seems that the feedback voltage is a set value of 82 mV which would require a 4…
Sebastian Pelletier
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UART - Logic Analyser

So I've been working on getting UART access to the head unit in my car; I've got the schematics of the unit and found that TX3/RX3 on the Renesas SH7750 are presented externally - along with 3 "test bit" pins. Pulling the test bits low in certain…
Whiterat
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