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123
BTM8630 Product User Guide
BTM8630
is
a
Bluetooth
stereo
module
which
can
be
used
to
design
Bluetooth
stereo speakers
.
Besides,
BTM8630
can
be
as
a
direct
connection
to
any
Bluetooth mobile
phone
when
designed
into
stereo
speakers device.
Interface
-
PIO
BTM8630
has
a total 8
programmable
I/O
terminals and 3 LEDs.
These
are
controlled
by
firmware
running
on the
device.
Microcontroller
The
microcontroller
(MCU),
interrupt
controller
and
event
timer
run
the
Bluetooth
software
stack
and
control
the
radio
and
host
interfaces.
A
16-
bit reduced
instruction
set
computer
(RISC)
microcontroller
is
used
for
low power
consumption
and
efficient
use
of
memory.
Audio
Interface
The
audio
interface
circuit
consists
of
a
audio
CODEC,
dual
audio inputs
and
outputs.
The CODEC
supports
playback
and
recording
of
audio
signals
at
multiple sample
rates
with
a
resolution
of
16-bit.
The
ADC
and
the
DAC
of
the CODEC
each
contain
two
independent
channels.
Any
ADC
or
DAC
channel can
be
run
at
its
own
independent
sample
rate.
The
audio
input
circuitry
consists
of
a
dual
audio
input
that
can
be configured
to
be
either
single
ended
or
fully
differential
and
programmed for
line
input.
The
audio
output
circuitry
consists
of
a
dual
differential
class
A-B
output stage.
Clock
Input
and
Generation
The
reference
clock
for
the
system
is
generated
from
a
TCXO
or
crystal input
26MHz.
All
internal
reference
clocks
are
generated using
a
phase
locked
loop,
which
is
locked
to
the
external
reference
frequency.

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