LV23411V Datasheet, PDF (10/23 Pages) Sanyo Semicon Device – For Home Stereo Systems FM/AM Tuner IC

LV23411V
LV23411 latches ACK at the rising edge.
The sequence to write data D into the register A of LV23411 is shown below.
• Start condition
• write the device address (C0h)
• write the register address, A
• write the target data, D
• stop condition
start
write device address
SCL
SDA
DA7
DA6...1
Ack
write register address
write data byte
stop
A7
A6...1
Ack
D7
D6...0
Ack
Fig. 4 Register write through I²C
When one or more data has been provided for writing, only the first data is allowed to be written.
Read sequence
• start condition
• write the device address (C0h)
• write the register address, A
• repeated start condition (or stop + start in a single master network)
• write the device address + 1 (C1h)
• read the register contents D, transmit NACK (no more data to be read)
• stop condition
start
write device address
SCL
SDA
DA7
DA6...1
Ack
start
write device address + 1
write register address
rep.
A7
A6...0
Ack
read data byte with NACK
stop
DA7
DA6...1
Ack
D7
D6...0
Fig. 5 Register read through I²C
Interrupt Pin INT
LV23411 has the dedicated interrupt output pin. For the active level to the host, either LOW or HIGH can be selected.
The INT output pin is kept floating while the PWRAD bit is cleared during initialization.
Therefore, to avoid influence on the CPU side during initialization, it is recommended to secure the non-active state by
means of the pull-up or pull-down resistor.
This enables direct INT output connection to non-masking interruption of the host CPU.
No.A1990-10/23