ad1884 Analog Devices, Inc., ad1884 Datasheet - Page 10

• Manufacturer Part Number: ad1884
• Description: High Definition Audio Soundmax Codec
• Manufacturer: Analog Devices, Inc.

AD1884
Table 3. AD1884 Pin Descriptions
Mnemonic
DIGITAL INTERFACE
DIGITAL I/O
JACK SENSE AND EAPD
ANALOG I/O
FILTER/REFERENCE
DV
POWER AND GROUND
DV
DV
DV
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.
SDATA_OUT
BIT_CLK
SDATA_IN
SYNC
RESET
GPIO_2
GPIO_1/MIC_BIAS-E
GPIO_0/EAPD
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
V
MIC_BIAS-B
MIC_BIAS-C
REF
CORE
IO
SS
DD
3.3V
3.3 V
_FILT
Pin No.
5
6
8
10
11
30
31
47
48
13
34
12
14
15
16
17
19
21
22
23
24
32
35
36
39
41
27
28
29
1
3
7
9
I/O
I
I
I/O
I
I
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
O
O
O
O
I
I
I
Rev. 0 | Page 10 of 16 | January 2007
Description
Link Serial Data Output. AD1884 input stream. Clocked on both edges of the
BIT_CLK.
Link Bit Clock. 24.000 MHz serial data clock .
Link Serial Data Input. AD1884 output stream clocked only on one edge of BIT_CLK.
Link Frame Sync.
Link Reset. AD1884 master hardware reset.
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 and MIC_BIAS_E. These functions are
mutually exclusive.
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.
Voltage Reference Filter.
Switchable Microphone Bias. For use with Port B (Pins 21, 22).
Switchable Microphone Bias. For use with Port C (Pins 23, 24).
Both MIC bias pins are capable of Hi-Z, 0 V, 1.65 V, 3.7 V, and 3.9 V (with 5.0 V on
Pin 33), Hi-Z, 0 V, 1.65 V, 2.86 V, and 3.0 V (with 3.3 V on Pin 33).
CAUTION: DO NOT APPLY 3.3 V TO THIS PIN!
Filter connection for internal core voltage regulator. This pin must be connected to
filter caps: 10 f, 1.0 f, and 0.1 f connected in parallel between Pin 1 and
D
Link Digital I/O Voltage Reference. 3.3 V
Digital Supply Return (ground).
Digital Supply Voltage 3.3 V. This is regulated down to DV
internal digital core internal to the AD1884.
VSS
(Pin 7).
CORE
on Pin 1 to supply the