Questions tagged [bus]
is a subsystem that transfers a plurality of digital bits grouped together to achieve or represent a common function or variable.
402 questions
0 votes
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40 views
Altium Designer 24x how to use bus port in sheet symbol to correctly connect in parent schematic
On one page I have: Parent schematic: First block is connecting OK Second does not connect correctly: What am I doing wrong? Sorry if the question is naive - I am doing it infrequently (electronics ...
- 2,712
1 vote
2 answers
128 views
Why does the 2‑wire asynchronous handshake use this exact edge sequence?
1. Control Models Master / Slave The master controls the communication line (decides when to transmit or receive). The slave transmits or receives under the master’s command. Peer‑to‑Peer (symmetric) ...
- 193
0 votes
1 answer
79 views
Cannot locate busses mentioned in the datasheet of this MCU
This STM32 MCU has the following block diagram which shows the busses, core, peripherals ect: The datasheet mentions busses called AHB, AHB1 and AHB2. But I can only see AHB2 is marked in the bus ...
- 483
0 votes
0 answers
82 views
ETAP: How to Remove Unnecessary Bus Between MV Switch and Transformer
I have a configuration where a medium-voltage switch connects directly to a transformer via a cable. There is no bus at the transformer side in the actual installation, as the cable terminates ...
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1 vote
2 answers
148 views
Is a Dedicated CAN Cable Essential for Reliable Long-Distance Communication?
When extending a CAN bus network that has the speed of 500 kbit/s with additional 15m length with 120-ohm terminators: Is using a dedicated 120-ohm CAN bus cable essential for minimizing ...
- 416
1 vote
1 answer
164 views
CAN Bus loop back mode. Is there need a connection of a transceiver and a termination resistor?
In a number of MCU families there are built in CAN bus controllers, which include self testing function of loop back. Loop Back mode can be configured as External Loop Back and Internal Loop Back. ...
2 votes
1 answer
120 views
Latch bus with FPGA issues
I have an FPGA that send data from a shared bus(the bus called COM(0:15)), which is connected to three buffers. Each buffer is connected to the same bus, and the FPGA controls which buffer will drive ...
- 553
0 votes
2 answers
124 views
Open drain inverter
I've got a chip with an active high open drain (i.e. high X normally, +Vcc when active) status pin that I'd like to feed to a bus with active low open collector. Both are running at the same voltage (...
- 125
5 votes
3 answers
444 views
16 RS485 sensor connectors
I am designing a PCB with 16 RS485 connectors. My idea is to create a "short" RS485 bus on PCB using PCB traces with 120 Ohm resistors on both ends. And then connect the 16 RS485 sensors to ...
- 497
8 votes
3 answers
813 views
In ARM AMBA buses, are the metal paths bidirectional or unidirectional?
I'm trying to figure out if on-chip busses (for e.g., ARM AMBA) have dedicated metal paths for each direction between the components the bus connects. Or does the bus use the same metal path to make ...
- 95
0 votes
1 answer
80 views
Injecting bits to a parallel communication bus possible?
Antennas can recieve data (bits) because RF signals induce an analog signal into it in a serial format, essentially a voltage that varies over time. My question is can we have an antenna that can ...
- 25
1 vote
1 answer
172 views
Hot pluggable CAN collections of devices
I'm trying to create a network of hot pluggable collections of iot devices into a bus (Containing Device 'A') that will always be present. There could be up to 50 collections with each collection ...
- 11
2 votes
1 answer
343 views
Bus contention - possible momentary short circuit with 74HC
I have a tristate bus where both input and output are controlled via 74HC573 latches, with only one latch OE (output enabled) active at any time. My concern is that the signal update from the control ...
- 123
0 votes
2 answers
1k views
Powering LED from a CAN bus signal
I am looking for a can it be done and, if someone is willing, a how to. I am building an OBD2 breakout box for easily scoping automotive computer data lines and want to add LEDs as a quick visual of ...
- 3
1 vote
2 answers
430 views
Memory clock and Bus clock
The bus clock rate is how many times per second data is transferred from one component to another. If we consider DRAM DDR4-3200, the clock frequency of the RAM bus today can be 1600 MHz at the same ...
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