AD1984 Analog Devices, Inc., AD1984 Datasheet - Page 10

• Manufacturer Part Number: AD1984
• Description: High Definition Audio Soundmax Codec
• Manufacturer: Analog Devices, Inc.

AD1984
Table 3. AD1984 Pin Descriptions
Mnemonic
DIGITAL INTERFACE
DIGITAL I/O
JACK SENSE AND EAPD
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.
GPIO_0/EAPD
SDATA_OUT
BIT_CLK
SDATA_IN
SYNC
RESET
DM_1/DM_2
DM_3/DM_4
DM_CLK
GPIO_2
GPIO_1/MIC_BIAS-E
S/PDIF_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 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 | January 2007
Description
Link Serial Data Output. AD1984 input stream. Clocked on both edges of the
BIT_CLK.
Link Bit Clock. 24.000 MHz serial data clock .
Link Serial Data Input. AD1984 output stream clocked only on one edge of BIT_CLK.
Link Frame Sync.
Link Reset. AD1984 master hardware reset.
Digital microphone 1 and 2 inputs (for bi-phase microphones), or digital microphone
1 input (for single-phase microphones).
Digital microphone 3 and 4 inputs (for bi-phase microphones), or 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.
General Purpose I/O/Microphone Bias for Port E. Capable of Hi-Z, 1.65 V, and 2.86 V.
Pin 31 shares functionality between GPIO_1 (default) and MIC_BIAS_E. These
functions are mutually exclusive and the GPIO function takes priority over the
MIC_BIAS function. When the GPIO enable bit is 0, Pin 31 functions as a MIC_BIAS pin
associated with Port E.
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 Hi-Z state. External
resistors should be used to insure the proper circuit state when this pin is in Hi-Z.
S/PDIF_OUT – 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 F
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.