BH3857 Rohm, BH3857 Datasheet - Page 6

• Manufacturer Part Number: BH3857
• Description: Audio sound controller
• Manufacturer: Rohm

FCircuit operation
(1)
As shown in Fig. 2, there are 32 bits of data. When the
power is applied, a reset is applied to switch ports 1 to 4
off, but the reset is not applied to the other ports, so they
are unstable. For this reason, it is necessary to input the
data at least once while the set mute circuit is on.
S Surround is on when the bit data is 0, and off when it
S With regard to the port 1 to 4 outputs, when the power
Audio ICs
Apply the following data for chip select and parity.
is 1.
is on, if no data is input the transistors for each output
are set to off. The outputs are on when the bit data is
1, and off when it is 0.
About the data format
D18 : Surround matrix 1 control
D19 : Surround matrix 2 control
BH3857AFV
669