User Manual

BTM-240/250 Pin Functions
PIN NAME TYPE FUNCTION
1 GND GND Ground
2 PIO
(
0
)
Bi-directional Pro
g
rammable In
p
ut / Out
p
ut Line
3
AUDIO
_
IN_LP
Analo
g
ue Micro
p
hone & Audio Si
g
nal in
p
ut
p
ositive
(
Left channel
)
4 AUDIO
_
IN
_
LN Analo
g
ue Micro
p
hone & Audio Si
g
nal in
p
ut ne
g
ative
(
Left channel
)
5 AUDIO
_
IN
_
RP Analo
g
ue Micro
p
hone & Audio Si
g
nal in
p
ut
p
ositive
(
Ri
g
ht channel
)
6 AUDIO
_
IN
_
RN Analo
g
ue Micro
p
hone & Audio Si
g
nal in
p
utne
g
ative
(
Ri
g
ht channel
)
7 AUDIO
_
OUT
_
RN Analo
g
ue S
p
eaker & Audio Si
g
nal out
p
ut ne
g
ative
(
Ri
g
ht channel
)
8 AUDIO
_
OUT
_
RP Analo
g
ue S
p
eaker & Audio Si
g
nal out
p
ut
p
ositive
(
Ri
g
ht channel
)
9 AUDIO
_
OUT
_
LN Analo
g
ue S
p
eaker & Audio Si
g
nal out
p
ut ne
g
ative
(
Left channel
)
10 AUDIO
_
OUT
_
LP Analo
g
ue S
p
eaker & Audio Si
g
nal out
p
ut
p
ositive
(
Left channel
)
11 GND GND Ground
12 GND GND Ground
13 +V
_
P
A
Powe
r
Power su
pp
l
y
for P
A
(
recommend 3.3V
)
14 +1V8 Power Leave open, when VDD_IN 1.8V operate, please wire with VDD_IN
15
V
DD
_
IN Powe
r
Power In
p
ut
(
normal 3.3V
)
16 NC Reserved
17 AIO0 Bi-directional
A
DC/DAC In
p
ut/Out
p
ut Line
18 AIO1 Bi-directional
A
DC/D
A
CIn
p
ut/Out
p
ut Line
,
Batter
y
Monitor In
p
ut
19 AIO3 Bi-directional
A
DC/DAC In
p
ut/Out
p
ut Line
20 PCM
_
SYNC
/
WS Bi-directional S
y
nchronous Data S
y
nc
/
I2S ws
(
t
yp
icall
y
SCK=64*WS
)
21 PCM
_
IN
/
SD
_
IN CMOS In
p
ut S
y
nchronous Data In
p
ut
/
I2S serial data in
22 PCM
_
OUT
/
SD
_
OUT CMOS Out
p
ut S
y
nchronous Data Out
p
ut
/
I2S serial data out
23 PCM
_
CL
K
/
SC
K
Bi-directional S
y
nchronous Data Clock
/
I2S serial data clock
24 UART
_
CTS CMOS In
p
ut UART Clear To Send
(
Active Low
)
25 UART
_
RTS CMOS Out
p
ut UART Re
q
uest To Send
(
Active Low
)
26 UART
_
RX CMOS In
p
ut UART Data In
p
ut
27 UART
_
TX CMOS Out
p
ut UART Data Out
p
ut
28 PIO
(
4
)
Bi-directional Pro
g
rammable In
p
ut / Out
p
ut Line
29 PIO
(
5
)
Bi-directional Pro
g
rammable In
p
ut/Out
p
ut line
30 PIO
(
6
)
Bi-directional Pro
g
rammable In
p
ut/Out
p
ut line
31 PIO
(
7
)
Bi-directional Pro
g
rammable In
p
ut/Out
p
ut line
32 USB
_
DP Bi-directional USB Data Plus
33 USB
_
DN Bi-directional USB Data Minus
34 SPI
_
MOSI CMOS In
p
ut Serial Peri
p
heral Interface Data In
p
ut
35 SPI
_
CSB CMOS In
p
ut Chi
p
Select For S
y
nchronous Serial Interface active low
36 GND GND Ground
37 GND GND Ground
38 SPI
_
CL
K
CMOS In
p
ut Serial Peri
p
heral Interface Clock
39 SPI
_
MISO CMOS Out
p
ut Serial Peri
p
heral Interface Data Out
p
ut
40 RESET CMOS In
p
ut Reset if hi
g
h. must be hi
g
h for >5ms to cause a reset
41 PIO
(
8
)
Bi-directional Pro
g
rammable In
p
ut/Out
p
ut Line
42 PIO
(
9
)
Bi-directional Pro
g
rammable In
p
ut/Out
p
ut Line
43 PIO
(
10
)
Bi-directional Pro
g
rammable In
p
ut/Out
p
ut Line
44 PIO
(
11
)
Bi-directional Pro
g
rammable In
p
ut/Out
p
ut Line
45 PIO
(
3
)
Bi-directional Pro
g
rammable In
p
ut/Out
p
ut Line
46 PIO
(
2
)
Bi-directional Pro
g
rammable In
p
ut / Out
p
ut Line
47 PIO
(
1
)
Bi-directional Pro
g
rammable In
p
ut/Out
p
ut Line
48 GND GND Ground
49 RF
_
IO Analo
g
ue
A
ntenna Interface
50 GND GND Ground