LC79451KB Datasheet, PDF (3/38 Pages) ON Semiconductor – Controller and Driver

4. Pin Functions
4-1. Pin List
Power Supply Pin
Symbol
Connection
VDD
Power supply
VDD2
Power supply
VSS
Power supply
Interface Setting Pin
Symbol
Connection
IFSEL
VDD/VSS
I²C Interface ID Setting Pin
Symbol
Connection
ID1
VDD/VSS
ID2
External Interface Pin
Symbol
Connection
RESET
External circuit
External circuit
CS
/VSS
SCL
External circuit
SDA
SPIDRW
DAOUT
BUSY
External circuit
External circuit
/VSS
External circuit
/Open
External circuit
/Open
LC79451KB
I/O
Range
-
+1.6V to +3.6V
-
+1.8V to +3.6V
-
0V
Logic power supply
Analog power supply
Ground
Function
I/O
Function
Interface selection
I
IFSEL = L : 2-wire serial interface (I²C)
IFSEL = H : 3-wire serial interface (SPI)
I/O
I²C interface ID
I
Connected to VDD : ID = 1
Connected to VSS : ID = 0
Function
I/O
Function
Reset signal
I
RESET = L : Initialization
RESET = H : Normal operation
LSI selection signal of 3-wire serial interface
CS = L : LSI operates
I
CS = H : LSI does not operate
(When you select 2-wire serial interface, please connect VSS.)
Serial clock of 2-wire serial interface
Pull-up to VDD.
I
Connect other device of open-drain output to Wired-OR.
Serial clock of 3-wire serial interface
Input and output data signal of 2-wire serial interface
Input : Pull-up to VDD.
I/O
Connect other device of open-drain output to Wired-OR.
Output : Nch open-drain.
Input data of 3-wire serial interface
Read / Write mode selection signal of 3-wire serial interface
SPIDRW = L : Write Mode
I
SPIDRW = H : Read Mode
(When you select 2-wire serial interface, please connect VSS.)
RESET detection signal of 2-wire serial interface
RESET detection signal or internal data of 3-wire serial interface
SPIDRW = L : RESET detection signal
O
SPIDRW = H : Internal data
(With selecting 2-wire serial interface, DAOUT outputs STERR of control register 4. It shows
RESET detection signal.)
The signal which shows prohibition of the update of “waveform parameter” and “control
register”
O
(With selecting 2-wire serial interface, BUSY output START of control register 4. It shows
prohibition of the update signal.)
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