New answers tagged ttl
2
votes
How does USB serial firmware update over 3 wires work?
The OP link points to a device from Jetimodel site, which is used to program "Jeti RC models". A quick search for images on Internet {Jeti model update interface} gives the following home-...
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1
vote
Accepted
How does USB serial firmware update over 3 wires work?
It can work in many different ways.
It looks like the port on the module is an external input. But it does not matter.
Physically, it may be a single bidirectional data wire, with the USB interface ...
- 164k
3
votes
Accepted
Review this TTL to RS485 Adapter (SP3485)
Rt is a termination resistor. You terminate an RS-485 bus by putting one Rt at each end of the bus just like in the picture. The resistor should match the characteristic impedance of the cable, so in ...
- 164k
5
votes
Accepted
Do I need a level shifter in between if I want to connect 3.3 V output signals to TTL-compatible inputs?
The diff line driver accepts a minimum of 2 V as a Logic-Hi input, and a maximum of 0.8 V as a Logic-Low input. There are some characterisations in the datasheet for 2.7 V and 7 V input so it accepts ...
- 38.1k
5
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Do I need a level shifter in between if I want to connect 3.3 V output signals to TTL-compatible inputs?
The numbers match.
The typical high-level output voltage of a TTL output is near 3.3 V, so in general, you can connect the output of any 3.3 V CMOS device directly to a TTL input.
(The high-level ...
- 19.7k
7
votes
How is Hyperterminal Working, regardless of port settings?
It's not about how Hyperterminal works. It's how the virtual COM ports work.
Hyperterm or any other program just opens COM port and sets the baud rate you select and does what you want with it.
But ...
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