Updating atmega tiers
Is it possible, in a single instruction cycle, to set all 19 bits to a specific address?
I understand I can set the high bits, then the middle bits, then the low bits and increment the low end port to step through the RAM however the mapping may not be sequential.
For interfacing ATmega8535, you have following components.1)LCD2)Keyboard3)ATmega8535 microcontroller4) 10K resistor (4)5)2.2K, 4.7K resistor6)30pf capacitor (2)7) 8MHz Crystal Oscillator8) BC547 Transistor Now interface circuit as shown in bellow figure on multipurpose PCB.
Before implementing components on PCB check the whole circuit on breadboard so that you can remove errors if any.
For example, I have a 512k B RAM chip which requires 19 address lines.
This requires multiple 8bit ports to adequately address.
Can I, again to take a random example, have the RAM place the 1st byte, then the 510th byte then the 294th byte on the data bus in three sequential CPU clock cycles? Trying to hang a large external SRAM off of these chips is basically starting off with a poorly conceived design.
Pick something with an external memory space and a sufficient linear address space - 32 bit cores are not expensive these days.
You can also email or comment if you have problems and can't get it to work.
Figure bellow shows overall block diagram and architecture of ATmega8535 microcontroller.
Architecture of ATmega8535 consist of several blocks in which some blocks are important such as, ALU (Arithmetic Logic Unit), EEPROM, General purpose register, Program counter, Flash Memory, Instruction Register and Decoder, Input Module, Interrupt Unit, Comparator, Status and Control.#include#include"delay.h"int main(void)Interfacing LCD and key board with ATmega8535 microcontroller is as shown in figure bellow.
I’ve made a small program that can be used to upload your own *files to arduino boards using the bootloader. I made it for my own use and found it pretty useful. To use it compile you’re code in something like Avr Studio.
Then simply start XLoader.exe, pick a hex file and press upload.