Hi, I am using AT89S8252 microcontroller in order to implement a Telescope GOTO system. This system needs a lot of star data and the AT89S8252 has only 8K of code and 2K of EEPROM. I also don't have much available IO. I am thinking to use a serial 1 MB FLASH memory to store the star database. Can anyone tell me which model I can use ? How many IO pins do I use ? 2 ? Best regards, Andre
I2C devices use 2 I/O pins, SPI devices (e.g., Atmel's DataFlash) use 4 I/O pins.