Product Info

LM746 Bluetooth® Dual Mode Audio Module
Standalone (With Embedded Bluetooth® 5 Compliant Stack)
Pin Assignments
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Name
GND
AIO1
AIO0
CAP_SENSE_0
CAP_SENSE_1
CAP_SENSE_2
CAP_SENSE_3
CAP_SENSE_4
CAP_SENSE_5
SD_IN & SPDIF_IN
SD_OUT & SPDIF_OUT
WS
SCK
SPI_CLK
Type
Ground
Bi-directional
Bi-directional
Analogue
Analogue
Analogue
Analogue
Analogue
Analogue
Bi-directional with weak pull-down
Bi-directional with weak pull-down
Bi-directional with weak pull-down
Bi-directional with weak pull-down
Input with strong pull-down
Description
Common Ground
Analogue input/output
Analogue input/output
Capacitive touch sensor input
Capacitive touch sensor input
Capacitive touch sensor input
Capacitive touch sensor input
Capacitive touch sensor input
Capacitive touch sensor input
I2S Interface & SPDIF Interface
Sync data output. Alt PIO_17
I2S Interface & SPDIF Interface
Sync data output. Alt PIO_18
I2S Interface & SPDIF Interface
Sync data output. Alt PIO_19
I2S Interface & SPDIF Interface
Sync data output. Alt PIO_20
SPI clock
Supply Domain
0V
VDD_AUX (1.35V)
VDD_AUX (1.35V)
VDD_AUDIO_DRV (1V8_SMPS)
VDD_AUDIO_DRV (1V8_SMPS)
VDD_AUDIO_DRV (1V8_SMPS)
VDD_AUDIO_DRV (1V8_SMPS)
VDD_AUDIO_DRV (1V8_SMPS)
VDD_AUDIO_DRV (1V8_SMPS)
PIO_POWER
PIO_POWER
PIO_POWER
PIO_POWER
PIO_POWER
2
AI
O
1 Bi-direction
al
A
nalogue input/outputVDD_AUX (1.35V)
4
C
AP_SENSE_0 Analogue
C
apacitive touch sensor inputVDD_AUDIO_DRV (1V8_SMPS)
6
C
AP_SENSE_2 Analogue
C
apacitive touch sensor inputVDD_AUDIO_DRV (1V8_SMPS)
8
C
AP_SENSE_4 Analogue
C
apacitive touch sensor inputVDD_AUDIO_DRV
(
1V8_SMPS
)
1
4
SPI_CLK Input with strong pull-dow
n
S
PI clockPIO_POWER
1
0
S
D_IN
&
S
PDIF_I
N
B
i-
d
irectiona
l
wit
h
wea
k
pu
ll
-
d
ow
n
I2S
Inter
f
ace
&
S
PDIF Inter
f
ace
S
ync data output. Alt PI
O
_17
PI
O
_P
O
WER
1
2
WS Bi-directional with weak pull-dow
n
I
2
S
Interf
ace
&
S
PDIF Interf
ace
S
ync data output. Alt PIO_19
PIO
_
POWER
15
16
17
18
19
20
21
22
SPI_MOSI
SPI_MISO
SPI_CS#
RESET
UART_RX
GND
UART_TX
LED0
Input with weak pull-down
Output with strong pull-up
Input with weak pull-down
Input with strong pull-up
Bi-directional strong pull-up
Ground
Bi-directional weak pull-up
Open drain output
Master out slave in (SPI)
Master in slave out (SPI)
Chip select for SPI, active low
Reset if low. Pull low for minimum 5ms for reset.
UART data input
Common Ground
UART data output
LED Driver
PIO_POWER
PIO_POWER
PIO_POWER
PIO_POWER
PIO_POWER
0V
PIO_POWER
PIO_POWER
Part No
Product
See Last Page
LM746
Pin Outs
Pin 1
55 36
35
21
20
LM746
Page 3 of 21
[phone] | [e-mail]