AD1983

Rev. 0 | Page 7 of 16

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

PIN 1

INDICATOR

NC = NO CONNECT

1

NC (Reserved)

2

SDATA_OUT

3

BIT_CLK

4

5

SDATA_IN

6

7

SYNC

8

RESET

24 PORT-D_R (Line Out)

23 PORT-D_L (Line Out)

21 SENSE_SRC

20 MIC_BIAS-C

19 MIC_BIAS-B

18 VREF_FILT

TOP VIEW

(Not to Scale)

AD1983

Figure 2. Pin Configuration

Table 5. Pin Function Descriptions

Mnemonic

Pin

No.

I/O1

Description

SDATA_OUT

2

I

HD Audio Link Serial Data Output. Codec input stream.

BIT_CLK

3

I

HD Audio Link Bit Clock Input. 24 MHz.

SDATA_IN

5

I/O

HD Audio Link Serial Data Input. Codec output stream.

SYNC

7

I

HD Audio Link Frame Sync.

RESET

8

I

HD Audio Link Reset. Master hardware reset.

GPIO_1/JS_0

31

Digital I/O

GPIO_1: General Purpose Input/Output Pin. Digital signal used for circuit control.

JS_0: Classical (DC) Jack Sense for Line_Out Pins. Low = jack not present, high = jack

present.

GPIO_0/JS_1

30

Digital I/O

GPIO_0: General Purpose Input/Output Pin. Digital signal used circuit control.

JS_1: Classical (DC) Jack Sense for Headphone. Low = jack not present, high = jack

present.

SENSE_A

9

Digital I

Jack Sense Input for Presence Detect on Port A Through Port D. Used with isolated

switches on audio jacks.

SENSE_SRC

21

Digital O

Connect via 2.67 kΩ 1% resistor to Pin 9 (SENSE_A) when using the SENSE_A functionality.

This reduces the current draw of the jack presence tree during idle states. Remove the

PORT-B_L (MIC)

13

Analog I

Microphone or Line-In Left Input.

PORT-B_R (MIC)

14

Analog I

Microphone or Line-In Right Input.

PORT-C_L (Line In)

15

Analog I

Line-In or Microphone Left Input.

PORT-C_R (Line In)

16

Analog I

Line-In or Microphone Right Input.

PORT-D_L (Line Out)

23

Analog O

Line-Out-(Front)-Left Channel.

PORT-D_R (Line Out)

24

Analog O

Line-Out-(Front)-Right Channel.

MONO_OUT

25

Analog O

Monaural Output to Telephony Subsystem Speakerphone.

PORT-A_L (Headphone)

27

Analog O

Headphone-Out-Left Channel.

PORT-A_R (Headphone)

28

Analog O

Headphone-Out-Right Channel.

VREF_FILT

18

O

Voltage Reference Filter.

MIC_BIAS-B

19

O

Programmable Microphone Bias Output. Intended for connection to Port-B.