Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [enable]

19 questions
4
votes
6 answers

What does "Driven low/high" mean in terms of electronics?

I keep seeing in specs/manuals to drive a pin high or low, what does that really mean? For example I'm working with a voltage regulator that has an ENABLE pin that says will switch the board to a low power state when "Driven Low".
Derek Cheng
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3
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2 answers

First time designing an SR latch; I'm using it to control the enable pin on my eFuse IC. Just want to know if I'm overlooking anything

I just finished designing my rectifier module that has a built-in voltage monitor IC and an eFuse IC. Its purpose is to convert the 3-phase AC output from my wind turbine and use it to power my USB type-C charger. My biggest hurdle with the type-C…
soconnoriv
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2
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3 answers

Do you need a current limiting resistor on an enable pin?

I am using MCP16312-E/MS buck regulator and need the component to always be on. I am therefore connecting the enable pin to the Vin supply. Do you need a current limiting resistor? Whilst the resistor I have in series with the enable pin will limit…
MRB
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2
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1 answer

Is this Arduino regulator power switch circuit okay?

(Okay so I've been informed that you're supposed to edit your existing post and not make a new one even if you want to change the question, so just FYI for anyone reading the comments, this is slightly different than what was originally here.) This…
Pecacheu
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2
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3 answers

Best way to implement a global FAULT input

I've got several microcontrollers multiple feet away from each other in a network that must be able to be put into a shutdown state all at once, ideally before power loss. I want to trigger a shutdown from a button, like an e-stop. A pair of "FAULT"…
Schuyler Horky
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1
vote
0 answers

How can I add an enable signal to a 3-Phase H-Bridge?

How can I add a signal to turn off or disable a 3-Phase H-Bridge? I have thought about adding a P-channel MOSFET controlled by a signal called Enable to open the voltage source of the bridge or a N-Channel one to open the circuit in the ground part.…
Developing Electronics
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1
vote
2 answers

Is there a proper way to enable a digital counter?

I'm asking this because, while learning about how counters work, I read that one can add an input that enables or disables the counter depending on its logical value. Now, my first instinct would have been to AND the enable input with the clock…
Thomas.M
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0
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1 answer

Voltage Supervisor (TPS3840DL) with Step-Down Converter (TPS54202)

I am trying to find the error in my schematic. I want to use the TPS3840DL supervisor to reset (turn off and on again) the TPS54202 step-down converter either when the voltage drops below the threshold or a manual reset is present (either button or…
pitchbent
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0
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0 answers

MCP2221A and ESP32-S3 Auto Program circuit?

I am currently trying to make my own development board but have run into a bit of a pickle. I want to be able to Auto Program the ESP32 since pressing a button each time is not something that I would like to do. I do know how to make an Auto Program…
Ask
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0 answers

Disabling Two Step-Down Converters Together

I have a circuit using two step-down converters (RT8299) which take in 24V and output 12V to power a 12V, up to 6A resistive load. Each converter is rated for 3A, testing has shown the current circuit can supply up to 2.5A before thermal issues. I…
InBedded16
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1 answer

Controlling ADC (on/off) with microcontroller

I'm designing a PCB. I want to turn the ADS1120 ADC off/on using the SAMD21G microcontroller. The ADC has two power inputs, 3.3V analog and 3.3V digital. The 3.3V analog is connected to an LDO that has an enable pin which is connected to one of…
Mostafa Ibrahim
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0
votes
2 answers

How enable for latch converts to clock in flip flop

Latch has enable signal and we cascade latches to make flip flops. How enable for latch converts to clock in flip flop. I mean how and why enable driven latches form edge triggered flip flops. Why Flip flops are not enable driven, but are edge…
Snoke
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1 answer

Is it ok to connect mux !E directly to GND?

I'm using a 74HC4067 mux, which I want always enabled. Is it ok for me to simply connect the !E ("not E" or "inverted E") to GND? To make the question more generic, is it ok to connect this "type" of input on the 74xxx components directly to GND or…
user1532080
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1 answer

How I can enable and disanable a verilog module

I have two modules. I want to run these modules in order. This is first module: module SinusLut(clk, aci ,reset,sonuc); input reset; input [7:0]aci; output reg [15:0]sonuc; input clk; always@(posedge clk) begin if (reset) sonuc<=…
Abdulkadir Arslan
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0
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0 answers

TPS63060 enable pin driver

because I want to have PWM dimming LED, I have connected PWM signal to EN pin of TPS63060. I wonder is this correct? According to datasheet chip have soft-start so it shouldn't destroy LED. PWM signal have 180Hz frequency, LED is white 1W…
athosikish
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