Serial to parallel chip

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For the best experience, please visit the site using Chrome, Firefox, Safari, or Edge. This page requires frames in order to show content. Browse Services Foundry Services. Tools and Resources. The transmission may also include parity bits that facilitate error detection. This is a 3-wire bidirectional interface the ground lines have been omitted for clarity. Notice that the receive and transmit lines exchange roles at the other end of the line.

An asynchronous data link is useful in applications in which devices communicate only sporadically. Since start and stop bits are included in every transmission, a device can initiate communication at any time by simply outputting its data. The number of connections between devices is reduced because clocking and control signals are no longer necessary. The data sheet of an ADC I am considering recommends using non-continuous clock on the serial interface.

The specification probably requires that the clock be kept inactive while the conversion is in progress. Some ADCs require this because a continuous data clock can feed through to the analog section of the device and adversely affect the integrity of the conversion.

Most synchronous serial converters can be easily interfaced to these ports; but in some cases additional "glue" logic may be necessary. I decided to put prejudice aside and use a serial ADC in my current design. I have just wired it up as the data sheet specifies. What's happening? Perhaps you are having a communications problem. We need to look at the connections between the ADC and the processor-and at how the timing and control signals have been set up.

We also need to look at the Interrupt structure. The next installment will return to this issue, discussing the problems encountered when designing serial interfaces. He has worked at Analog Devices for 30 years in various field and factory roles covering mixed-signal, precision, and RF products.

Is there a way to translate between those? This can be done with a UART such as the Here's an example that converts serial to parallel Schematics of a Printer Adaptor. Unlike more modern UARTs the does not have any internal registers that need to be 'programmed' to set it up, so it can be used standalone - and it has separate parallel read and write ports which are easier to use in a 'dumb' hardwired circuit.

Serial to Parallel Printer Interface. The attached picture shows a Miracle Serial to parallel converter for the Sinclair QL, courtesy of The QL had no ex-factory Centronics printer interface, and solutions that blocked the expansion port for connecting a printer only were not really what customers wanted, so the Centronics Interface was a cash-cow for Miracle Systems for years.

Inside, there's a small PIC16C54 MCU ex-General Instruments, now Microchip that does the serial-to-parallel conversion and feeds off the signal lines so it doesn't need an extra power supply. Here is a picture that has a detail view of the innards of a slightly different version.

This is only barely Retrocomputing. But ports for PCs are still available and as noted below, the companies I dealt with years ago for converters still sell them. But there aren't so many printers these days with serial or parallel ports now that M or even 1G network ports for printers are dirt cheap, so we'll call it Retro.

For example, Okidata Microline printers would typically come standard with a parallel port but you could add a serial port card I probably still have one around here somewhere. In more recent years I think they even had a network card that used the same interface slot, though I never bothered with that myself.

With PC-compatibles this is trivial, but with other machines not always so easy. Plus there are situations e. Plus end-to-end serial has big advantages over parallel - feet without any problem at all.

Voltage is, I think, the least of the conversion issues. The big factor is handshaking. Over the years, I found that parallel handshaking was very reliable but serial Sign up to join this community. If you are curious, you might want to try the samples from the first example with this circuit set up just to see what happens. Code Sample 2. It sends out a second byte. This forces the first shift register, the one directly attached to the Arduino, to pass the first byte sent through to the second register, lighting the green LEDs.

The second byte will then show up on the red LEDs. Here they need to be moved back into the main loop to accommodate needing to run each subfunction twice in a row, once for the green LEDs and once for the red ones. This means that line. Turning it on 2. Connect to Arduino 3.

Add 8 LEDs. Add a second shift register. Connect the 2 registers. Add a second set of LEDs. Circuit Diagram The Code. The Circuit 1.