ADSP-1981BL AD [Analog Devices], ADSP-1981BL Datasheet - Page 10

• Manufacturer Part Number: ADSP-1981BL
• Description: AC 97 SoundMAX Codec
• Manufacturer: AD [Analog Devices]

AD1981BL
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
Table 7. Pin Function Descriptions
Pin No.
DIGITAL I/O
2
3
5
6
8
10
11
48
CHIP SELECTS
45
46
JACK SENSE AND EAPD
17
16
47
ANALOG I/O
13
14
15
18
19
20
21
1
Mnemonic
XTL_IN
XTL_OUT
SDATA_OUT
BIT_CLK
SDATA_IN
SYNC
RESET
SPDIF
ID0
ID1
JS0
JS1
EAPD
PHONE_IN
AUX_L
AUX_R
CD_L
CD_GND_REF
CD_ R
MIC1
SDATA_OUT
SDATA_IN
XTL_OUT
BIT_CLK
XTL_IN
RESET
DV
DV
NC = NO CONNECT
DV
DV
SYNC
DD
DD
SS
SS
NC
1
1
2
2
10
11
12
1
2
3
4
5
6
7
8
9
I/O
I
O
I
O/I
O
I
I
O
I
I
I
I
O
I
I
I
I
I
I
I
48
13
Figure 9. 48-Lead LQFP Pin Configuration
47
14
CD Audio Analog Ground Reference for Differential CD Input.
Description
Crystal Input (24.576 MHz) or External Clock Input.
Crystal Output.
AC-Link Serial Data Output, AD1981BL Data Input Stream.
AC-Link Bit Clock Output (12.288 MHz) or Bit Clock Input, if Secondary Mode
Selected.
AC-Link Serial Data Input, AD1981BL Data Output Stream.
AC-Link Frame Sync.
AC-Link Reset, AD1981BL Master Hardware Reset.
S/PDIF Output.
Chip Select Input 0 (Active Low). This pin can also be used as the chain input from a
secondary codec.
Chip Select Input 1 (Active Low).
Jack Sense 0 Input.
Jack Sense 1 Input.
External Amp Power-Down Control.
Phone Input. Mono input from telephony subsystem speaker phone or handset.
Auxiliary Input Left Channel.
Auxiliary Input Right Channel.
CD Audio Left Channel.
CD Audio Right Channel.
Microphone 1 Input (Mono) or Left Channel when 2-Channel Mode Selected
(Stereo MIC).
46
15
Rev. A | Page 10 of 32
45
16
44
17
AD1981BL
(Not to Scale)
TOP VIEW
43
18
42
19
41
20
40
21
39
22
38
23
37
24
36
35
34
33
32
31
30
29
28
27
26
25
LINE_OUT_R
LINE_OUT_L
AV
AV
AFILT4
AFILT3
AFILT2
AFILT1
V
V
AV
AV
REFOUT
REF
DD
SS
SS
DD
4
1
4
1