Bluetooth Audio Module
Ehong Technology Co., Ltd
8.
Mechanical and PCB Footprint Characteristics
...................................................................................... 27
9.
RF Layout Guidelines
.................................................................................................................................... 28
10.
Reflow Profile
............................................................................................................................................... 29
11.
Contact Information
................................................................................................................................... 30
2. Table of Tables
T
ABLE
1:
R
ECOMMENDED
O
PERATING
C
ONDITIONS
.................................................................................................... 5
T
ABLE
2:
A
BSOLUTE
M
AXIMUM
R
ATING
R
ECOMMENDED
O
PERATING
C
ONDITIONS
................................................... 5
T
ABLE
3:
P
OWER CONSUMPTIONS
................................................................................................................................ 7
T
ABLE
4:
D
IGITAL
T
ERMINAL
......................................................................................................................................... 8
T
ABLE
5:
USB
T
ERMINAL
.............................................................................................................................................. 8
T
ABLE
6:
A
NALOGUE TO
D
IGITAL
C
ONVERTER
............................................................................................................. 9
T
ABLE
7:
D
IGITAL TO
A
NALOGUE
C
ONVERTER
........................................................................................................... 10
T
ABLE
8
:
PIN
T
ERMINAL
D
ESCRIPTION
..................................................................................................................... 13
T
ABLE
9:
P
IN
S
TATUS ON
R
ESET
................................................................................................................................ 14
T
ABLE
10:
P
OSSIBLE
UART
S
ETTINGS
...................................................................................................................... 15
T
ABLE
11:
A
LTERNATIVE
F
UNCTIONS OF THE
D
IGITAL
A
UDIO
B
US
I
NTERFACE ON THE
PCM
I
NTERFACE
............... 18
T
ABLE
12
:
D
IGITAL
A
UDIO
I
NTERFACE
S
LAVE
T
IMING
............................................................................................... 21
T
ABLE
13
:
D
IGITAL
A
UDIO
I
NTERFACE
M
ASTER
T
IMING
............................................................................................ 21
T
ABLE
14:
USB
I
NTERFACE
C
OMPONENT
V
ALUES
.................................................................................................... 25
3. Table of Figures
F
IGURE
1
:
P
INOUT OF
EH-MB18
.............................................................................................................................. 10
F
IGURE
2
:
P
OWER
S
UPPLY
PCB
D
ESIGN
................................................................................................................ 13
F
IGURE
3
:
C
ONNECTION
T
O
H
OST DEVICE
............................................................................................................... 15
F
IGURE
4
:
E
XAMPLE
EEPROM
C
ONNECTION WITH
I
2
C
I
NTERFACE
........................................................................ 16
F
IGURE
5
:
A
PPLE
C
O
-
PROCESSOR
2.0C
................................................................................................................... 16
F
IGURE
6
:
A
PPLE
C
O
-
PROCESSOR
2.0B
................................................................................................................... 17
F
IGURE
7
:
A
UDIO
I
NTERFACE
..................................................................................................................................... 18
F
IGURE
8
:
D
IGITAL
A
UDIO
I
NTERFACE
M
ODES
.......................................................................................................... 20
F
IGURE
9
:
D
IGITAL
A
UDIO
I
NTERFACE
S
LAVE
T
IMING
............................................................................................... 21
F
IGURE
10
:
D
IGITAL
A
UDIO
I
NTERFACE
M
ASTER
T
IMING
.......................................................................................... 21
F
IGURE
11:
E
XAMPLE
C
IRCUIT FOR
SPDIF
I
NTERFACE
(C
O
-A
XIAL
)
........................................................................ 22
F
IGURE
12:
E
XAMPLE
C
IRCUIT FOR
SPDIF
I
NTERFACE
(O
PTICAL
)
........................................................................... 22
F
IGURE
13:
M
ICROPHONE
B
IASING
(S
INGLE
C
HANNEL
S
HOWN
)
............................................................................... 23
F
IGURE
14:
S
PEAKER OUTPUT
.................................................................................................................................... 24
F
IGURE
15:
USB
C
ONNECTIONS
................................................................................................................................ 25
F
IGURE
16:
R
EFERENCE
D
ESIGN
............................................................................................................................... 26
F
IGURE
17:
R
ECOMMENDED
PCB
M
OUNTING
P
ATTERN
(U
NIT
:
MM
,
D
EVIATION
:0.02
MM
)TOP
V
IEW
..................... 27
F
IGURE
18:
C
LEARANCE
A
REA OF
A
NTENNA
............................................................................................................. 28
F
IGURE
19:
R
ECOMMENDED
R
EFLOW
P
ROFILE
......................................................................................................... 29