If your design is based on 89C51, you don't have to worry if it's changed later with 89C No changes are to be performed, neither software nor hardware some minor settings in the hardware programmer device. But if your software relies on 89C52 then simple looking at the features provided by both microcontroller will tell you in what aspect will changes affect your design if a replacement with 89C51 has to be done.
ElecThai Member level 2. Silvio you answer true. One major difference though. Philips uses a Flash process, no byte addressability.
Otherwise a switch if needed should be pretty smooth. Code Warrior Full Member level 4. As you can notice, it's only english. And it's not stated by me. It's Atmel's statement. I'm confident you know what a bootloader means. In this one you won't be seen by the peoples who really can help you. This thread regarding difference between 89C51 and 89C52 it's not opened by smart peoples just because can't find any news or it's useless answering to a question for which you can find the answer just reading the datasheets.
And use a suggestive title for the thread. Please type the full complains of compiler. When you say "removing the iSR" are you completelly remove the code from your program?. Or just keep the function code and declare it as not using interrupts. There are another few questions : 2. What kind of memory model do you use? No I2C interface. No SPI interface. One I2C interface. One SPI interface.
Support — Ad ons Some development kits are available in market, but the support is poor. Lesser development community. Very few sensors kits available in market.
Many development kits are available in market, with strong support. Huge development community and forums. Many sensors. Shields are available in market which can be mounted on the arduino board and can be used instantly. Some arduino stack-able shields. Arduino Dev-Board Projects. Almost all prefer to use arduino in their projects. Before arduino electronics, electrical and embedded systems engineers use to work with microcontrollers, pic microcontrollers, nxp, avr, arm and atmega etc microcontrollers.
Lets find it out. In this post i will list down the key differences between the microcontrollers and arduino particularly 89c51,89c52 and arduino which makes arduino popular among newbies. What is Arduino? Arduino is a development board that houses a microcontroller on it. It has its own dedicated ide Integrated Development environment. The ide is named as Arduino ide.
These two registers TH and TL are timer high byte and timer low byte registers. These are bit registers. Recall timer counter can count up to and 16 bits cover in binary.
Since 89c51,89c52 is an 8-bit microcontroller, so to load we need two registers one representing the high byte and other the low byte. TH0 and TL0 are byte addressable only. The most important bits of the timers TRx and TFx are also in it. TRx timer run and TFx timer overflow bits which we use in almost all our timer applications are in it. If you want to access the individual bits of the registers, you can access them by their names. You can also access whole register it self by its name.
At the bottom of the page their is a small example explaining it. TCON timer Control register with its individual bits and sfr. TMOD is an eight bit register, it is bit addressable. Higher four bits 4 to 7 are related to Timer 1 where as the lower four bits 0 to 3 perform the exact same functions, but for timer 0.
You can see their functions in the figure above. We can use timer as bit counter or bit counter by setting the above TMOD register bits.
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