ard_newbie:
As per datasheet, I can see that Max6675 communicates via SPI as a Slave (not I2C !!) with a microcontroller as an SPI Master.Or you can read it like it is done in this thread:
MAX6675 Thermocouple Interface - Interfacing - Arduino Forum
cant we use the sda and scl for spi? Sorry to ask if its wrong. SPI also uses clock and data signal for communication, can we use normal digital pins for spi communication. If so then sda and spi pins are particularly for i2c communication. Is there any special pins for spi communication?I see six pins in centre of due as SPI what does it is used for?