LC79451KB datasheet(3/38 Pages) ONSEMI

No de pièce	LC79451KB

Description	Controller and Driver

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Fabricant	ONSEMI [ON Semiconductor]

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LC79451KB

No.A2223-3/38

4. Pin Functions

4-1. Pin List

Power Supply Pin

Symbol

Connection

I/O

Range

Function

VDD

Power supply

-

+1.6V to +3.6V

Logic power supply

VDD2

Power supply

-

+1.8V to +3.6V

Analog power supply

VSS

Power supply

-

0V

Ground

Interface Setting Pin

Symbol

Connection

I/O

Function

IFSEL

VDD/VSS

I

Interface selection

IFSEL = L : 2-wire serial interface (I

2C)

IFSEL = H : 3-wire serial interface (SPI)

I

2C Interface ID Setting Pin

Symbol

Connection

I/O

Function

ID1

ID2

VDD/VSS

I

2C interface ID

Connected to VDD : ID = 1

Connected to VSS : ID = 0

External Interface Pin

Symbol

Connection

I/O

Function

RESET

External circuit

I

Reset signal

RESET = L : Initialization

RESET = H : Normal operation

CS

External circuit

/VSS

I

LSI selection signal of 3-wire serial interface

CS = L : LSI operates

CS = H : LSI does not operate

(When you select 2-wire serial interface, please connect VSS.)

SCL

External circuit

I

Serial clock of 2-wire serial interface

Pull-up to VDD.

Connect other device of open-drain output to Wired-OR.

Serial clock of 3-wire serial interface

SDA

External circuit

I/O

Input and output data signal of 2-wire serial interface

Input : Pull-up to VDD.

Connect other device of open-drain output to Wired-OR.

Output : Nch open-drain.

Input data of 3-wire serial interface

SPIDRW

External circuit

/VSS

I

Read / Write mode selection signal of 3-wire serial interface

SPIDRW = L : Write Mode

SPIDRW = H : Read Mode

(When you select 2-wire serial interface, please connect VSS.)

DAOUT

External circuit

/Open

O

RESET detection signal of 2-wire serial interface

RESET detection signal or internal data of 3-wire serial interface

SPIDRW = L : RESET detection signal

SPIDRW = H : Internal data

(With selecting 2-wire serial interface, DAOUT outputs STERR of control register 4. It shows

RESET detection signal.)

BUSY

External circuit

/Open

O

The signal which shows prohibition of the update of “waveform parameter” and “control

register”

(With selecting 2-wire serial interface, BUSY output START of control register 4. It shows

prohibition of the update signal.)

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