What is 4-line SPI Clock?

[liuyying]

What is 4-line SPI Clock? Can anyone explain for me??

 

[SkyHigh]

Do you mean 4-wire SPI?
If so, 3-wire SPI (MISO, MOSI, SCLK) and 1 wire which can be Chip Select or Output Enable.
This I have seen for managing multiple SPI devices on the same bus.

 

[liuyying]

4-line SPI Clock that used in LCD, are this 4-line SPI Clock is 4-wire SPI??
can explain further??

 

[krishna1288]

File:SPI single slave.svg - Wikipedia, the free encyclopedia

If you see here it has four lines... guess 4 line SPI is the same.....

 

[umesh49]

These four lines are for datain, dataout, clock and chip select. If you data is unidirection like microcontroller to LCD, then you might need not to use Datain pin.

 

[SkyHigh]

I am quite sure the LCD you use will adopt standard 3-wire SPI and 1 select or enable, in the event this LCD shares the same SPI bus with other SPI devices.

4-line SPI Clock that used in LCD, are this 4-line SPI Clock is 4-wire SPI??
can explain further??

 

[upand_at_them]

SPI is 4 wire: SDO, SDI, SCK, and CS. But if you're interfacing to an LCD then you probably mean the 4 bit serial mode, which is not SPI.