AD1985 Analog Devices, AD1985 Datasheet - Page 10

• Manufacturer Part Number: AD1985
• Description: AC'97 2.3 Soundmax Codec W/jack Sensing
• Manufacturer: Analog Devices

AD1985
PIN CONFIGURATION AND FUNCTIONAL DESCRIPTIONS
Circuit Layout Note: In normal operation, Surround and Line Out are swapped to provide headphone drive on line outputs. Therefore Pins 35, 36 become the Surround
L/R outputs and Pins 39, 41 become the Line Out (Front) L/R outputs with headphone drive.
Pin Descriptions
DIGITAL I/O
Pin Name
XTL_IN
XTL_OUT
SDATA_OUT
BIT_CLK
SDATA_IN
SYNC
RESET
SPDIF
CHIP SELECTS/CLOCK STRAPPING
Pin Name
ID0
ID1
Pin Number
45
46
Pin Number
2
3
5
6
8
10
11
48
I
O
I
O/I
O
I
I
O
I/O
I
I
I/O
NC = NO CONNECT
SDATA_OUT
SDATA_IN
XTL_OUT
Description
Crystal Input (24.576 MHz) or External Clock In (24.576 MHz, 14.31818 MHz, or 48.000 MHz).
Crystal Output.
AC Link Serial Data Output. AD1985 input stream.
AC Link Bit Clock. 12.288 MHz serial data clock. (Input pin, for secondary mode only.)
AC Link Serial Data Input. AD1985 output stream.
AC Link Frame Sync.
AC Link Reset. AD1985 master hardware reset.
SPDIF Output.
Description
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).
BIT_CLK
XTL_IN
RESET
DV
DV
DV
DV
SYNC
JS3
DD1
DD2
SS1
SS2
10
11
12
1
2
3
4
5
6
7
8
9
Figure 10. 48-Lead LQFP Pin Configuration
13 14 15 16 17 18 19 20 21 22 23 24
48 47 46 45 44
PIN 1
IDENTIFIER
Rev. 0 | Page 10 of 48
(Not to Scale)
AD1985
TOP VIEW
43 42 41 40
39 38 37
36
35
34
33
32
31
30
29
28
27
26
25
LINE_OUT_R (FRONT)
LINE_OUT_L (FRONT)
AV
JS2
LFE_OUT
CENTER_OUT
AFILT2
AFILT1
V
V
AV
AV
REFOUT
REF
DD4
SS1
DD1