PEDL2841DIGEST-01
OKI Semiconductor
ML2841
BLOCK DIAGRAM
IOCVDD
D7/SDI
D6/SDO
D5/SCLK
D4/DIPH
D3-D0
CSB
WRB
RDB
ILE
IRQ
IFSEL
LRCLK
BCLK
SAIIN
MCLK
SAIOUT
HPVDD
HPGND
SG
FIFO
64poly
Sound generator
VOL
CPU I/F
(8bit parallel, Serial I/F)
SAI
(Master)
Class D
Headphone
amp
HPOUTL
HPOUTR
HPOUTC
MIX
Audio
FIFO
MP3
SEL2
SEL1
SRC
VOL
ADPCM
Audio DAC
SRS3D
5-band
EQ
Analog output
amp
AOUTL
AOUTR
IOSVDD
Logic
PLL
RESETB
SYSCLK
Audio
PLL
AVDD
AGND
BIAS
VREF
PLLVDDH
PLLVDDC
PLLGNDH
PLLC
Explanation of block diagram
SAI (Master): Serial Audio Interface for external audio. The block supports master mode.
Audio FIFO:
FIFO for ADPCM and MP3. Either of ADPCM or MP3 can be in use.
SG FIFO:
FIFO for sound generator
SRC:
Sampling Rate Converter for mixing between sound generator and other audio source.
SRS3D:
3D surround by SRS Labs
VOL:
Volume
MIX:
Mixing block
SEL1:
Selector of MP3, ADPCM or External Audio input from SAIR.
SEL2:
Select bypass or mixed sound
TMODE1
TMODE2
DVDD1
DVDD2
DVDD3
DGND1
DGND2
3/15
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