Questions tagged [soc]

A system on a chip or system on chip (SoC) is an integrated circuit (also known as an "IC" or "chip") that integrates all components of a computer or other electronic systems. It may contain digital, analog, mixed-signal, and often radio-frequency functions—all on a single substrate. SoCs are very common in the mobile computing market because of their low power consumption. A typical application is in the area of embedded systems.

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soc clock domain questions

Those days there have so many different protocols in the soc which basically means different clock rate. In a Soc system, there have CPU which run at some clock speed, then there have memory(dram) to ...
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BlueNRG-2 from STMicroelectronics Range Problem

I have configured my Bluenrg2 with the help of a Bluenrgsdk module with Data Length Extension of 251 bytes and ATT_MTU as 247. I ...
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From Compiling Embedded Linux Kernel to Generating Image for Target Platform [migrated]

So I recently acquired Ingenic SoC based RS-97 game, which runs MIPS instruction set. The vendor vaguely provided instruction on how to compile the linux kernel for the target SoC. So based on vendor ...
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RF shield needed for BLE SoC in PCB design

I´m checking the implications of using BLE in a new design. This design will include in the same PCB a BLE SoC, the specific matching network and an anetnna (still checking if I´m going to use a ...
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Adding Ethernet ports to my SoC

I'd like to add multiple (>5) Ethernet ports to a board I am developing. Linux on the CPU has to see each port individually, be able to route the traffic among ports, and also add traffic on its own (...
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System on Chip (SoC) ARM + FPGA (ZynQ-7xxx) - code design methodology

So far I've only been working with either ARM processor or FPGA/CPLD device separately. I.e. either I used a dedicated toolchain to generate binaries for a processor system from a C code, or I used a ...
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46 views

Reason for power on sequence requirement in SoC

In the SoCs that I am working on, memory rail has to be powered up first and then the logic rail. And memory rail is expected to be higher in voltage than logic rail at any point in time. Could you ...
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Using an AXP22x PMIC on I2C instead of RSB

I've got a board with an AXP223 PMIC on it. According to the data sheet, it has an I2C (or TWI, or P2WI, or RSB...) host interface, so the chip is connected to the SoC's I2C bus. The problem I'm ...
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SA636 Local Oscillator — Which Pin?

This is about a very specific RF system on a chip -- NXP's SA636, "Low voltage, high-performance mixer FM/IF system...". Datasheet is here: https://www.nxp.com/docs/en/data-sheet/SA636.pdf. The ...
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How do I procure SoCs in small quantities? [closed]

I want to design an SBC but I am having difficulty with buying the SoC. I'm thinking of Snapdragon, Mediatek, Allwinner, Amlogic and Rockchip (These are the ones I know, if you know others I would ...
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From microcontrollers to microprocessors [Embedded Devices] [closed]

I was told by some developer that embedded controllers are task specific devices that requires low latency which processor based devices can't offer due to OS overhead. So I would like to first of ...
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Interconnect between different blocks of SoC from different vendors

So I am planning to do a learning project of installing embedded linux into to SoC. One from smartphone vendor Spreadtrum SC7731 and the other from generic smart devices vendor Ingenic JZ4725B. Since ...
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Unused pins on H6 Allwinner SoC

I am looking at a reference design for the allwinner H6 SoC. My question is pretty straightforward. Why does pin B3 need to be powered if the EPHY pins are unused. Additionally, pin B4 is being pulled ...
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Wishbone B4 rule 3.55: Is this for a special case?

Rule 3.55 of Wishbone B.4 states: "MASTER interfaces MUST be designed to operate normally when the SLAVE interface holds [ACK_I] in the asserted state." I read this rule together with permission 3.35,...
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How can Qsys component configuration be accessed in software?

I'm designing a Qsys component which I want to be user-configurable. It has config parameters which are defined in the TCL file. For example, for a GPIO bank component I would write: ...
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what triggers the PREADY signal in a slave of an APB?

I was trying to understand the state machine of an APB. I was curious on how the PREADY signal is triggered low so that it can exit from the ACCESS state? If anyone could help me with this basic ...
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How can I program an SOC without a hardware kit?

I am new to the production side of electronics. I was wondering if I can directly use a DA14683 to implement a size-constrained project. I have a few queries in mind Is interfacing a SOC similar to ...
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Battery SOC, SOH and depth of discharge (DOD) calculation

Here I studied the concepts of SOC and DOD, practically by seeing with a constant load we can calculate the SOC of battery (car battery). So is there any algorithm to calculate the SOC by practical ...
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148 views

PLDs, DSPs, MCUs, MPUs and SoCs Typical Application [closed]

PLDs, DSPs, MCUs, MPUs and SoCs are all embedded devices, they can be programmed / configured to achieve a specific application. I've worked with MCUs and FPGAs in the past and realized that they are ...
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137 views

Can SoC Processors be used as more powerful microcontrollers? [closed]

I'm starting with microcontrollers (still avr), and once I finish, I'll be moving on to ARM based microcontrollers. However, as I've been reading, the ARM Cortex M is basically the best you can get, ...
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What is the difference Verilog race condition, X's propagation and Metastability?

I'm trying to understand Verilog Race Condition X's propagation and Metastability with http:/...
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1answer
79 views

Can Cortex-A series ARM processors remap the physical address of DRAM via the Memory Controller?

Many ARM SoCs have memory as MMIO. However, I have seen other ARM processors that support (like x86, et. al.) the ability to program the memory controller and move this mapping. Is this a SoC-...
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Is it possible to use EL3 on an AllWinner SoC (R18)?

I have been looking for a cheap development board to play around with ARMv8 EL3 mode in the interest of writing a monitor. I stumbled across the PINE64 recently and it seemed like a great fit. It used ...
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141 views

APB PENABLE stays only for one PCLK regardless of PREADY signal

I followed the AMBA 3 APB specification to design my APB slave. Reading from slave requires several clock cycles to make the data ready for the bus, so I set my PREADY signal for one clock cycle ...
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187 views

How to program SoC chips like CC2541F128RHAT [closed]

I am working on a BLE project. As per initial research, decided to use the cc2541 chip as BLE module. I have found one here. As per the datasheet, it shows it contains BLE and MCU. I need to program ...
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Can I2S tdm interface send more channels with less sampling frequency?

We have a arm SoC(system on chip) connected with I2S to a DSP (digital signal processor). SoC and DSP both support 48khz, 8 channel and 16bits in TDM mode. Is it possible to use this interface to ...
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Is there any single-board computer/system-on-a-chip with good documentation for developing bare metal? [closed]

I always wanted to develop my own crappy operating system, but the many weird legacy quirks of the x86/PC platform kept me from doing so (e.g. real vs protected mode, only low resolutions available in ...
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616 views

What's the best internal SoC bus?

As far as I know there are two major buses - AMBA/AXI and Wishbone. While AMBA/AXI has proven itself in almost every ARM chip, I didn't find some numbers for Wishbone. Are there any benchmarks or real ...
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71 views

Change memory content of FPGA SoC (DE1-SoC) using software while .sof (EPCQ) is running on FPGA

I am new to FPGA and FPGA-SoC world. I have a DE1-SoC board. I am doing a project. Hardware design of the project contains a memory block which is initialized using .mif file. I know that we can use ...
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ARM SoC UART interaction with peripheral UART

I am sorry that I couldn't find this answer in this site or web. I have an ARM SoC(Host) which needs to communicate with the peripheral having ARM Micro controller using UART. Linux runs on top of ARM ...
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Why are accelerometers (and other MEMS devices) so rarely integrated into components?

With the way things are headed, more and more functionality moves into a single chip each year. However, one thing that seems to remain completely untouched by this is MEMS devices like accelerometers ...
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SOC vs ARM Core

I am trying to understand the difference between SoC ( System on Chip ) and ARM Core. In the following post, I have read "The typical ARM processor in use today is integrated with peripherals on a ...
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161 views

ETSI[Europe] Regulations for 2.4Ghz ISM Bandwidth Limit and RF Power

I am trying to interface my STM32 with NRF24[2.4 Ghz ] or TI CC2500[2.4 Ghz] models. I am finding issue regarding maximum allowable Bandwidth and RF power set by ETSI[Europe] EN 300 328 and EN 300 440(...
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using smartphones SOC or other components as microcontroller like arduino [closed]

i have a smartphone which has stuck in boot loop,i was just wondering if i could use it's internal components like SOC to use it as microcontroller like "arduino".have anyone ever tried it?or possess ...
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How far away can DDR3 memory be placed from the SoC?

I thought of an idea where i have a pcb with a soc on it, and a seperate one with the DDR3 memory that can snap into each other. This way i can replace or debug specefic parts of the system and have e....
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Below which voltage should an AGM deep cycle battery cease to supply charge to devices

I am using an AGM deep cycle battery 130Ah 12V connected to 200W solar panels and a 500W inverter to power electrical devices such as fans, laptops and lamps. The inverter has an automatic cutoff ...
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255 views

Circuit to Toggle Ultrasonic Sensor

To preface I am a software developer, not an electrical engineer so please go easy on me as there are likely gaps in my knowledge here. I am utilizing an nrf52832 SoC (specs: https://github.com/...
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265 views

How to select the model selector for TI IBIS model of DRA725?

Following is the IBIS model selector section for the DRA725 SoC in IBIS file. Currently, I do SI analysis of DRA725 with Mentor HyperLynx SI, Intention is to select the right model selector. What to ...
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Difference between SOC and MCU [duplicate]

What i know is that system on chip(SOC) is like microcontroller alongside with other component like bluetooth module etc. So what is the difference between the mcu in soc and the normal one ? and ...
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964 views

Wiring on-off switch with resistor to SoC

Please note: although this question involves a Raspberry Pi (hereafter RPi), it is really a pure electronics question at heart! I am trying to connect my RPi 1 Model A to a breadboard with a single, ...
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Finding RAM product/solution for tiny embedded linux system (<1GB)

I'm finding it quite difficult to navigate among the copious memory solutions available when selecting a RAM solution for a tiny embedded system I'm developing. I will run an OS such as PetaLinux on ...
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How to calculate battery's energy?

To calculate battery's energy, one should use the nominal voltage or 100% SOC voltage?
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130 views

How to use a reference design in datasheet?

I'm trying to gain a better understanding on what this is and how to use it. I know this is a datasheet for SAMB11 SoC, more specifically the reference design on page 50 is what I'm inquiring about. ...
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90 views

Building a board game, not sure what to use for the “computer” [closed]

My brothers and I are building an interactive board game that will require a central device to keep track of the number of players, player resources, turns, location, etc. I have an idea of how I'm ...
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What thing should be consider while choosing BLE uC [closed]

I'm newbie in BLE segment need micro-controller with bluetooth (SOC). Please help me what thing should be consider while choosing SOC.
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643 views

How to use an USB port with 3.3v power output?

I am trying to use an USB port on a development board that doesn't provide a standard A socket. Instead, it provides 4 pins: 3.3V, two data pins and ground. Looking at the datasheet of the SoC, there ...
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490 views

Standard Interface Between LCD and GPU

Almost all smartphones on the market seem to use a distinct LCD as their display, though most use an ARM processor with a GPU from one of a relatively (compared to the screens) small number of ...
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If a SoC is given more memory then it is able to use, how does it deal with that?

Say it can only use 2GB's, and is provided 4, does it only use half, or not use any of the ram?
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AXI master bus functional model in vhdl

I am a Verilog user trying to make sense of VHDL code of AXI4 Master bus functional model (BFM) AXI bus master VHDL code I have a few questions from the above code What would block diagram of the ...
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Altera equivalent of the Xilinx Zynq UltraScale+ MPSoC [closed]

I'm new the the FPGA world. I was wondering if anybody could tell me the Altera equivalent of the Xilinx Zynq UltraScale+ MPSoC? I'm looking to buy a development board but it needs to be from Altera....