Microchip SPI query

Question

This is only a minor issue ref the Microchip implementation of Master mode SPI in the MSSP module. But I would appreciate any assistance here.

On a typical connection from a PIC18F45K20-I/MLPIC18F45K20-I/ML to a 25LC320 EEPROM, a read command can be sent followed by two address bytes,

the module then provides 8 'clocks' to read out the data. According to the EEPROM data sheet, all the data from the initial start address may

then be sequentially read out of the EEPROM without resending a read command ( followed by two address bytes etc)

question - how can the PIC MSSP module be used to sequentially read the all the data out of the EEPROM without resending read commands

in between each byte received?

Is there a command to continue sending clock cycles within the module?

Thanks

Carl

firatkocak · Answer

Hi,

AFAIK, when you send a read command then EEPROM is in the read mode till it receives a LOW CS signal. After reading a byte internal read address counter is incremented by one and then next and then it goes on. For this reason you can read the entire EEPROM data in one process. This is also true for I2C EEPROM devices where you need to send aSTOP command to interrupt reading process.

I hope it helps.

Firat

KennyMillar · Answer

Hopefully this App Note An1000 and this video will help. Both are from Microchip :-)