LC79451KB Datasheet, PDF (12/38 Pages) ON Semiconductor – Controller and Driver

6. Function Explanation
6-1. I²C/SPI Interface Selection Function
LC79451KB
The interface supports 2-wire serial interface (I²C) and 3-wire serial interface (SPI).
The interface is selected by connecting IFSEL pin to VDD or VSS.
I²C ⇒ Connect IFSEL to VSS
SPI ⇒ Connect IFSEL to VDD
(1) I²C Interface Signal
1) RESET (In)
2) SCL
(In)
3) SDA
(In/Out)
4) IFSEL (In)
5) ID1
(In)
6) ID2
(In)
7) BUSY (Out)
8) DAOUT (Out)
---- Reset signal.
---- Serial clock.
---- Serial data.
---- Serial interface selection.
---- I²C interface ID.
---- I²C interface ID.
---- Prohibition signal of the update of specific register.
---- Reset detection signal.
(2) SPI Interface Signal
1) RESET (In)
2) CS
(In)
3) SCL
(In)
4) SDA
(In)
5) IFSEL (In)
6) BUSY (Out)
7) SPIDRW (In)
8) DAOUT (Out)
---- Reset signal.
---- Device selection.
---- Serial clock.
---- Serial data.
---- Serial interface selection.
---- Prohibition signal of the update of specific register.
---- Read/Write mode selection signal.
---- Reset detection signal. Internal data.
No.A2223-12/38