lm4935rlx National Semiconductor Corporation, lm4935rlx Datasheet - Page 7

• Manufacturer Part Number: lm4935rlx
• Description: Audio Sub-system With Dual-mode Stereo Headphone And Mono High Efficiency Loudspeaker Amplifiers And Multi-purpose Adc
• Manufacturer: National Semiconductor Corporation

Pin
G1
G2
G3
G4
G5
A1
A2
A3
A4
A5
A6
A7
B1
B2
B3
B4
B5
B6
B7
C1
C2
C3
C4
C5
C6
C7
D1
D2
D3
D4
D5
D6
D7
E1
E2
E3
E4
E5
E6
E7
F1
F2
F3
F4
F5
F6
F7
7.0 Connection Diagrams
Pin Descriptions
TEST_MODE/CS
AUX_OUT_NEG
AUX_OUT_POS
INT_MIC_NEG
INT_MIC_POS
HP_VMID_FB
SPI_MODE
VREF_FLT
EXT_BIAS
CPO_NEG
CPO_POS
Pin Name
PLL_FILT
INT_BIAS
HP_VMID
MIC_DET
CPI_NEG
EXT_MIC
I2S_SDO
CPI_POS
PLL_V
EP_NEG
PLL_V
EP_POS
BYPASS
I2S_CLK
LS_NEG
LS_POS
BB_V
I2S_SDI
I2S_WS
GPIO_2
GPIO_1
LS_V
LS_V
LS_V
VSAR2
VSAR1
AUX_R
AUX_L
A_V
D_V
A_V
HP_R
HP_L
SDA
SCL
IRQ
DD
SS
DD
DD
DD
DD
SS
SS
DD
Analog
Supply
Analog
Analog
Analog
Analog
Supply
Supply
Analog
Analog
Analog
Analog
Supply
Analog
Analog
Analog
Analog
Analog
Analog
Analog
Supply
Supply
Analog
Analog
Analog
Analog
Supply
Supply
Analog
Analog
Analog
Analog
Supply
Analog
Analog
Analog
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
Input
Input
Input
Input
Input
Input
Input
Input
Inout
Input
Inout
Input
Input
Inout
Inout
Input
Inout
Input
Input
Inout
Input
Input
Inout
Inout
Input
Input
Input
Input
Input
Input
Inout
Inout
Input
Earpiece negative output
Headphone and mixer V
Internal microphone positive input
External microphone input
Input to SAR channel 2
Input to SAR channel 1
PLL V
Headphone and mixer V
Earpiece positive output
Internal microphone negative input
A_V
If SPI_MODE = 1, then this pin becomes CS. If SPI_MODE = 0,
and TEST_MODE/CS = 1, then this places the LM4935 into test mode.
Filter point for PLL VCO input
PLL V
Headphone Right Output
External microphone supply (2.0/2.5/2.8/3.3V)
2.0V/2.5V ultra-clean supply for internal microphone
Right Analog Input
General Purpose I/O 2
Control Data, I2C_SDA or SPI_SDI
Control Clock, I2C_SCL or SPI_SCK
Headphone Left Output
Filter point for the microphone power supply
Left Analog Input
Control mode select 1 = SPI, 0 = I2C (or test)
General Purpose I/O 1
Baseband V
Digital V
Virtual Ground for Headphones in OCL mode, otherwise 1st headset detection input
VMID Feedback in OCL mode, otherwise a 2nd headset detection input
Headset insertion/removal and Microphone presence detection input
Cell Phone analog input negative
Interrupt request signal (NOT open drain)
I2S Serial Data Out
I2S Serial Data Input
Loudspeaker V
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 positive output
Loudspeaker V
Loudspeaker negative output
Cell Phone analog output positive
Auxiliary analog output positive
(Continued)
DD
SS
DD
/2 filter point
DD
DD
DD
DD
SS
for the digital I/Os
7
DD
SS
Description
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