BU7839GVW_10 Datasheet, PDF (4/16 Pages) Rohm – Digital Input Class-D Headphone Amplifier

BU7839GVW
●Block diagram
Technical Note
MCLK
BCLK
LRCLK
SDI
DVDDIO
DVSSIO
SCL
SDA
NRST
Audio
I/F
Interpolator
ΔΣ
Modulator
Interpolator
ΔΣ
Modulator
2wire
CPU I/F
Register
Power
on/off
control
Level Shifter
Level Shifter
256fs
PLL
ADR
TEST
DVDD DVSS
REFCLK
12MHz in
Fig. 2 Block diagram
●Description of each block
●2wire CPU I/F
Interface with CPU, 2-wire control
Write/read possible
Device address is 2-address selectable (33h,36h) with ADR terminal
●Register
This LSI is controlled all by register
Write/read by 2wire CPU I/F
●Audio I/F
Compatible with three modes of full front, full back and IIS
Sampling frequency compatible with 8kHz～48kHz
●Interpolator,ΔΣModulator
Variable over sampling, Order-variable ΔΣ modulator
Optimum value is selected internally and automatically
●Level Shifter
Level conversion in 3V series of analogue output
Built-in mute transistor for start-up sound reduction
●PLL
REFCLK terminal is taken as reference clock and 256fs is created
It becomes the default setting when 12MHz is inputted to REFCLK
Please change each setting if any frequency other than 12MHz is inputted to REFCLK
MUTE_R
VDD_R
OUT_R
VSS_R
MUTE_L
VDD_L
OUT_L
VSS_L
PLLVDD
PLLCAP
DVSS
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2010.05 - Rev.A