Seeking MS12232 12832 LCD screen 51 single chip microcomputer serial port driver There are many para

Say, pay attention to what you say! Arino won't give it to you!!

Serial hard drives are better.

1. Parallel port hard disk.

That is, PATA, also known as parallel ATA hard disk, uses a four-core power cable and an 80-core data cable to connect with the motherboard to transmit data in parallel and in series (series). Due to the limitation of parallel transmission, the transfer rate is low, and the PATA hard disk does not need to be driven.

Second, the serial port hard disk.

Hard disks that use the SATA (Serial ATA) interface are also called serial hard disks. Serial hard drives are a new type of hard drive interface that is completely different from parallel ATA and is well-known for its serial data transfer.

3. The advantages of serial port to parallel port.

Compared with parallel ATA, it has many advantages.

1. Serial ATA transmits data in a continuous serial manner, and only 1 bit of data is transmitted at a time. This reduces the number of pins in the SATA connector, resulting in fewer connection cables and higher efficiency. In fact, Serial ATA does all the work with just four pins, connecting cables, connecting ground, sending and receiving data, while reducing system energy consumption and complexity.

2. Serial ATA has a higher starting point and greater development potential, the data transfer rate defined by Serial ATA can reach 150MB S, which is higher than the highest parallel ATA (i.e. ATA 133) can achieve the highest data transfer rate of 133MB S, while the data transfer rate of Serial ATA will reach 300MB S, and finally SATA3 achieves the highest data transfer rate of 600MB S.

What is a serial hard disk and what is a parallel hard disk.

The parallel port hard disk is configured before 06 years, it is a row of 80-pin interfaces, the socket is relatively large, the serial port is configured after the second half of 06 years, and the data line is a seven-needle line. The socket is comparatively smaller. The serial port transmits data faster than the parallel port.

Upstairs is an old article.,Now it's all with sta2.,SATA's technology is relatively mature.,The price is the same as IDE.,You can use it with confidence.,And the motherboard of Intel 915 or more has only one IDE port.,You don't want to use SATA!

What is the difference between serial port hard disk and parallel port hard disk?

The transmission speed is different, and the serial port (SATA interface) can reach 600 s

The data cable is also different. The serial port power supply is plugged on the data interface and supports hot swapping, but it should be noted that there is.

Microcontrollers are integrated circuit chips, which use ultra-large-scale integrated circuit technology to put the best processor CPU and RAM RAM with data processing capabilities

Read-only memory ROM, a variety of I-O ports and interrupt systems, timers, counters and other functions (may also include display drive circuits, pulse width modulation circuits, analog multiplexers, AD converters and other circuits) integrated into a silicon wafer to form a small but complete microcomputer system, widely used in the field of industrial control.

Here's how:

Look at the end of the adapter wire, there are four Dupont wires of different colors. They are:

Red—> VCC

White—> rx receiver.

Green—> tx sender.

Black — > ground.

1. The serial port on the single-chip microcomputer is generally two ports, one is the TX transmitter and the other is the RX receiver.

2. Write a good serial port program, there are many tutorials on this Internet, and different single-chip microcomputer programs are different, so I will not repeat them here. The following is the part written by the author**, set the baud rate to 9600, and burn the program to the microcontroller.

It should be the difference between 52 and 51, both are based on the 51 kernel, the pin function is basically the same, but 52 is a strengthening of 51, there is an extra timer 2, etc., the operation of the two is basically the same.

52 has one more timer than 51 2 and twice as much internal RAM, so if you don't use timer 2, it's the same as using 51.

Remember to adopt it.

52 has 3 timers, 51 has only 2 timers.

The 52 internal RAM is 256 bytes, and the 51 is 128 bytes.

52 multiple DU timers, RAM 51 is 128 and 52 is 256.

The last number zhi

The word indicates the size of the daoe2prom, e2prom = the last digit * 4k, c51 is 4k, c52 is 8k.

In addition, the return RAM is also different, 52 has an extra timing.

Device 2, a higher baud rate can be set in serial communication, and the function of timer 2 is not the same as the other two timers.

52 is an enhanced version of 51, S52 is more than C51, timer is one more T2 (this Dongdong is very tough), RAM more than 128B, ROM more 4K, 2 more interrupts, one more watchdog, and some improvements in power failure, data pointers, etc.

The highest external crystal oscillator of the S52 can reach 33MHz, and the C51 is only about 24MHz.

Now on the market, C51 is almost eliminated,**The two are close (may be the same), if you want to buy, the stall owner will generally recommend you to buy S52.