Texas Instruments LM49370RLEVAL Evaluation Board LM49370RLEVAL/NOPB LM49370RLEVAL/NOPB 데이터 시트
제품 코드
LM49370RLEVAL/NOPB
SNAS356D – FEBRUARY 2007 – REVISED MARCH 2012
Pin Descriptions
Pin
Pin Name
Type
Direction
Description
A1
EP_NEG
Analog
Output
Earpiece negative output
A2
A_V
DD
Supply
Input
Headphone and mixer
V
V
DD
A3
INT_MIC_POS
Analog
Input
Internal microphone
positive input
positive input
A4
PCM_SDO
Digital
Output
PCM Serial Data Output
A5
PCM_CLK
Digital
Inout
PCM clock signal
A6
PCM_SYNC
Digital
Inout
PCM sync signal
A7
PCM_SDI
Digital
Input
PCM Serial Data Input
B1
A_V
SS
Supply
Input
Headphone and mixer
ground
ground
B2
EP_POS
Analog
Output
Earpiece positive output
B3
INT_MIC_NEG
Analog
Input
Internal microphone
negative input
negative input
B4
BYPASS
Analog
Input
A_V
DD
/2 filter point
If SPI_MODE = 1, then
B5
TEST_MODE/CS
Digital
Input
this pin becomes CS.
B6
PLL_FILT
Analog
Input
Filter point for PLL VCO
input
input
B7
PLL_V
DD
Supply
Input
PLL V
DD
C1
HP_R
Analog
Output
Headphone Right Output
C2
EXT_BIAS
Analog
Output
External microphone
supply (2.0/2.5/2.8/3.3V)
supply (2.0/2.5/2.8/3.3V)
C3
INT_BIAS
Analog
Output
Internal microphone
supply (2.0/2.5/2.8/3.3V)
supply (2.0/2.5/2.8/3.3V)
C4
AUX_R
Analog
Input
Right Analog Input
C5
GPIO_2
Digital
Inout
General Purpose I/O 2
C6
SDA
Digital
Inout
Control Data, I2C_SDA or
SPI_SDA
SPI_SDA
C7
SCL
Digital
Input
Control Clock, I2C_SCL or
SPI_SCL
SPI_SCL
D1
HP_L
Analog
Output
Headphone Left Output
D2
VREF_FLT
Analog
Inout
Filter point for the
microphone power supply
microphone power supply
D3
EXT_MIC
Analog
Input
External microphone input
D4
SPI_MODE
Digital
Input
Control mode select 1 =
SPI, 0 = I2C
SPI, 0 = I2C
D5
GPIO_1
Digital
Inout
General Purpose I/O 1
D6
BB_V
DD
Supply
Input
Baseband V
DD
for the
digital I/Os
D7
D_V
DD
Supply
Input
Digital V
DD
E1
HP_VMID
Analog
Inout
Virtual Ground for
Headphones in OCL
mode, otherwise 1st
headset detection input
Headphones in OCL
mode, otherwise 1st
headset detection input
E2
MIC_DET
Analog
Input
Headset insertion/removal
and microphone presence
detection input.
and microphone presence
detection input.
E3
AUX_L
Analog
Input
Left Analog Input
E4
CPI_NEG
Analog
Input
Cell Phone analog input
negative
negative
E5
IRQ
Digital
Output
Interrupt request signal
(NOT open drain)
(NOT open drain)
E6
I2S_SDO
Digital
Output
I2S Serial Data Out
4
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