LC79451KB

No.A2223-36/38

The following shows a connection example of SPI interface and charge-pump pin, when you use these two devices

and share the charge-pump voltage.

The figure omits the capacitor connection of the power supply.

Please set CP_F12: 11 = (0, 1) (control register 1) to the slave side.

Please input START command of control register 4 to slave device at the same time input to master device.

Fig.18. SPI interface connection example (Joint charge-pump voltage)

Notice : The use example using the plural IC is out of a guarantee.

TEST

LC79451KB

ZVDD

ZVSS

TESTLOUT

RESET

VSS

ID1

ID2

VDD

IFSEL

VSS

SPIDRW

CS

SDA

SCL

TESTAOUT

BUSY

DAOUT

VDD2

Controller

VDD

VDD2

VSS

TEST

LC79451KB

ZVDD

ZVSS

TESTLOUT

RESET

VSS

ID1

ID2

VDD

IFSEL

VSS

SPIDRW

CS

SDA

SCL

TESTAOUT

BUSY

DAOUT

VDD2

VOUT0

C01A

C01B

C11A

C11B

VOUT1

C21A

C21B

C22A

C22B

VOUT2

C31A

C31B

VOUT3

VOUT0

C01A

C01B

C11A

C11B

VOUT1

C21A

C21B

C22A

C22B

VOUT2

C31A

C31B

VOUT3