lm49370rl National Semiconductor Corporation, lm49370rl Datasheet - Page 6

• Manufacturer Part Number: lm49370rl
• Description: Audio Sub-system With An Ultra Low Emi, Spread Spectrum, Class D Loudspeaker Amplifier, A Dual-mode Stereo Headphone Amplifier, And A Dedicated Pcm Interface For Bluetooth Transceivers
• Manufacturer: National Semiconductor Corporation

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Pin
C1
C2
C3
C4
C5
C6
C7
D1
D2
D3
D4
D5
D6
D7
G1
G2
G3
G4
G5
A1
A2
A3
A4
A5
A6
A7
B1
B2
B3
B4
B5 TEST_MODE/CS Digital
B6
B7
E1
E2
E3
E4
E5
E6
E7
F1
F2
F3
F4
F5
F6
F7
Pin Descriptions
AUX_OUT_NEG Analog
AUX_OUT_POS Analog
INT_MIC_POS
INT_MIC_NEG
HP_VMID_FB
PCM_SYNC
SPI_MODE
PCM_SDO
VREF_FLT
CPO_NEG
EXT_BIAS
CPO_POS
PCM_CLK
Pin Name
PCM_SDI
PLL_FILT
INT_BIAS
EXT_MIC
HP_VMID
MIC_DET
CPI_NEG
CPI_POS
I2S_SDO
EP_NEG
PLL_V
EP_POS
BYPASS
I2S_CLK
LS_NEG
LS_POS
I2S_SDI
I2S_WS
GPIO_2
GPIO_1
BB_V
LS_V
LS_V
AUX_R
AUX_L
D_V
A_V
A_V
HP_R
HP_L
SDA
SCL
IRQ
DD
DD
SS
DD
DD
SS
DD
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Supply
Supply
Supply
Supply
Supply
Supply
Supply
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Digital
Type
Direction
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Output
Input
Input
Inout
Inout
Input
Input
Input
Input
Input
Input
Input
Input
Inout
Inout
Input
Inout
Input
Input
Inout
Input
Input
Inout
Input
Input
Input
Input
Input
Input
Input
Inout
Inout
Input
Earpiece negative output
Headphone and mixer V
Internal microphone positive input
PCM Serial Data Output
PCM clock signal
PCM sync signal
PCM Serial Data Input
Headphone and mixer ground
Earpiece positive output
Internal microphone negative input
A_V
If SPI_MODE = 1, then this pin becomes CS.
Filter point for PLL VCO input
PLL V
Headphone Right Output
External microphone supply (2.0/2.5/2.8/3.3V)
Internal microphone supply (2.0/2.5/2.8/3.3V)
Right Analog Input
General Purpose I/O 2
Control Data, I2C_SDA or SPI_SDA
Control Clock, I2C_SCL or SPI_SCL
Headphone Left Output
Filter point for the microphone power supply
External microphone input
Control mode select 1 = SPI, 0 = I2C
General Purpose I/O 1
Baseband V
Digital V
Virtual Ground for Headphones in OCL mode, otherwise 1st headset detection input
Headset insertion/removal and microphone presence detection input.
Left Analog Input
Cell Phone analog input negative
Interrupt request signal (NOT open drain)
I2S Serial Data Out
I2S Serial Data Input
VMID Feedback in OCL mode, otherwise a 2nd headset detection input
Loudspeaker V
Cell Phone analog input positive
Cell Phone analog output negative
Auxiliary analog output negative
I2S Word Select Signal (can be master or slave)
I2S Clock Signal (can be master or slave)
Loudspeaker negative output
Loudspeaker ground
Loudspeaker positive output
Cell Phone analog output positive
Auxiliary analog output positive
DD
DD
/2 filter point
DD
DD
for the digital I/Os
DD
6
DD
Description