Non-technical knowledge of Single Chip Microcomputer

Generally, the microcomputer (PC) is composed of the Main Board, CPU, memory, hard disk, and other devices, the single-chip microcomputer means that these devices are integrated into one chip (or some of them are implemented through external chip Extension). The single-chip microcomputer is also called a microcontroller (MCU ), the Chinese name "single chip microprocessor" is literally translated by the English name "single chip microprocessor.

MCS-51 single chip microcomputer is the United States inte company in 1980 launched the product (before there is a 1978 launch of MCS-48 single chip microcomputer), typical products are 8031 (internal NoProgramMemory, which has been eliminated in actual use) and 8051 (HMOs for chips, with a power consumption of 630 MW, 5 times that of 89C51, which has been eliminated in actual use) and 8751 and other general products, until now, MCS-51 kernel series compatible single chip microcomputer is still the mainstream products of the application (such as the current popular 51, has been discontinued 89C51, etc ), the training materials of colleges and universities and professional schools are still based on the theory of MCS-51 single chip microcomputer as a representative.

Some documents even referred to the 8051 MCS-51 series SCM, 8051 is the most typical masterpiece of the early, because of the MCS-51 SCM has a far-reaching impact, many companies have launched a compatible series SCM, that is to say, the MCS-51 kernel has actually become an 8-Bit Microcontroller standard. After 8-bit single-chip microcomputer, Intel continues to launch 16-bit and 32-bit single-chip microcomputer, but it is still dominant in the market. The Single-Chip Microcomputer on the market mainly includes Intel's MCS51 series, Atmel's at89 series, and Philips's 87 and 80 Series. Obviously, these models all use the MCS51 kernel.

Differences between 31/51 and 32/52

The latter is known as the Enhanced type, that is, it has 8 k rom (if there is an in-disk ROM), 256 k ram, 3 counters, 6 interrupts, the corresponding former has only 4 k rom (if there is an in-disk ROM), 128 k ram, 2 counters, and 5 interruptions.

Differences between C and C

The difference between the two lies in the manufacturing process. HMOs are used without C, and chmos are used with C. The power consumption is much smaller than the former. There is also a popular s51 single-chip microcomputer. The main difference between it and the C51 is that the program memory writing mode is different. The C51 only supports parallel writing, and the VPP burning high pressure is also required. The s51 supports ISP online programmable write technology, which provides faster serial write speed and better stability. The burning voltage only needs 4 ~ 5 V.