ad1984a Analog Devices, Inc., ad1984a Datasheet - Page 10

• Manufacturer Part Number: ad1984a
• Description: High Definition Audio Soundmax Codec
• Manufacturer: Analog Devices, Inc.

AD1984A
Table 4. Pin Function Descriptions
Mnemonic
DIGITAL INTERFACE
DIGITAL I/O and EAPD
JACK SENSE
ANALOG I/O
The symbols used in this table are defined as: I = input, O = output, LI = line level input, LO = line level output, HP = output capable of driving
headphone load, MIC = input supports microphones with MIC bias and boost amplifier.
EAPD/GPIO_0
SDATA_OUT
BIT_CLK
SDATA_IN
SYNC
RESET
DM_1/2
DM_2
DM_CLK
GPIO_2
MIC_BIAS-E/GPIO_1
SPDIF_OUT
SENSE_A/SRC_B
SENSE_B/SRC_A
PCBEEP
PORT-E_L
PORT-E_R
PORT-F_L
PORT-F_R
CD_GND (PORT F)
PORT-B_L
PORT-B_R
PORT-C_L
PORT-C_R
MONO_OUT
PORT-D_L
PORT-D_R
PORT-A_L
PORT-A_R
Pin No.
5
6
8
10
11
2
4
46
30
31
47
48
13
34
12
14
15
16
17
19
21
22
23
24
32
35
36
39
41
I/O
I
I
I/O
I
I
I
I
O
I/O
I/O
I/O
O
I/O
I/O
LI
LI, MIC, LO
LI, MIC, LO
LI, LO
LI, LO
I
LI, MIC
LI, MIC
LI, MIC
LI, MIC
LO
HP, LO
HP, LO
HP, LO
HP, LO
Rev. 0 | Page 10 of 20 | April 2008
Description
Link Serial Data Output. AD1984A input stream. Clocked on both edges of the
BIT_CLK.
Link Bit Clock. 24.000 MHz serial data clock.
Link Serial Data Input. AD1984A output stream clocked only on one edge of BIT_CLK.
Link Frame Sync.
Link Reset. AD1984A master hardware reset.
Digital Microphone 1 and 2 Inputs (for Biphase Microphones), or Digital Microphone
1 Input (for Single-phase Microphones).
Digital Microphone 2 Input (for Single-phase Microphones).
Clock to Drive External Digital Microphones.
General-Purpose Input/Output Pins. Digital signals used to control or sense external
circuitry.
Microphone Bias for Port E/General-Purpose Input/Output. Capable of high-Z, 1.65 V,
and 2.86 V. Pin 31 shares functionality between MIC_BIAS_E (default) and GPIO_1.
These functions are mutually exclusive and the MIC_BIAS function takes priority over
the GPIO function.
EAPD/General-Purpose Input/Output pin. Pin 47 shares functionality between
GPIO_0 and EAPD. These functions are mutually exclusive and the EAPD function
takes priority over the GPIO function. By default, the pin is in a high-Z state. External
resistors should be used to ensure the proper circuit state when this pin is in high-Z.
Supports S/PDIF Output.
Jack Sense A-D Input/Sense B drive.
Jack Sense E-F Input/Sense A drive.
Monaural Input from System for Analog PCBeep.
Auxiliary Input/Output Left Channel.
Auxiliary Input/Output Right Channel.
Auxiliary Input/Output Left Channel.
Auxiliary Input/Output Right Channel.
CD Audio Analog Ground Reference. Must be connected to AGND via a 0.1 μF
capacitor if not in use as CD_GND. MUST always be ac-coupled.
Front Panel Stereo MIC/Line-In.
Front Panel Stereo MIC/Line-In.
Rear Panel Stereo MIC/Line-In.
Rear Panel Stereo MIC/Line-In.
Monaural Output to Internal Speaker or Telephony Subsystem Speakerphone.
Rear Panel Headphone/Line-Out.
Rear Panel Headphone/Line-Out.
Front Panel Headphone/Line-Out.
Front Panel Headphone/Line-Out.