ASAHI KASEI
[AK4101]
MS0076-E-01
2001/12
- 1 -
GENERAL DESCRIPTION
The AK4101 is a four outputs digital audio transmitter(DIT) which supports data rate up to 192kHz
sample rate operation. The AK4101 encodes and transmits audio data according to the AES3,
IEC60958, S/PDIF & EIAJ CP1201 interface standards. The AK4101 accepts audio and digital data,
which is then multiplexed, encoded and driven on to a cable. The audio serial port is double buffered
and supports eight formats.
FEATURES
Sampling Rate up to 192kHz
Support AES3, IEC60958, S/PDIF & EIAJ CP1201 professional and consumer formats
Generates CRC codes and parity bits
Four on-chip RS422 line drivers
64-byte on-chip buffer memory for Channel Status and User bits
Supports synchronous/asynchronous access to Channel Status and User bits
Supports multiple clock frequencies: 128fs, 256fs, 384fs and 512fs
Supports Left/Right justified and I
2
S audio formats
Easy to use 4 wire, Serial Host Interface
Audio Routing Mode (Transparent Mode)
Power supply: 4.75 to 5.25V
TTL level I/F
Small Package: 44pin LQFP
Temperature range of -10 to 70
C
Quad Outputs 192kHz 24-Bit DIT
AK4101
ASAHI KASEI
[AK4101]
MS0076-E-01
2001/12
- 4 -
PIN/FUNCTION
No. Pin
Name
I/O
Description
1
PDN
I
Power Down & Reset Pin (Pull-up Pin)
When "L", the AK4101 is powered-down, TXP/N pins are "L" and the
control registers are reset to default values.
2
MCLK
I
Master Clock Input Pin
3
SDTI1
I
Audio Serial Data Input 1 Pin
4
SDTI2
I
Audio Serial Data Input 2 Pin (Pull-down Pin)
5
SDTI3
I
Audio Serial Data Input 3 Pin (Pull-down Pin)
6
SDTI4
I
Audio Serial Data Input 4 Pin (Pull-down Pin)
7 VDD
- Power Supply Pin, 4.75V
5.25V
8
VSS
-
Ground Pin, 0V
9
BICK
I/O
Audio Serial Data Clock Input/Output Pin
Serial Clock for SDTI pins which can be configured as an output based on
the DIF2-0 inputs.
10
LRCK
I/O
Input/Output Channel Clock Pin
Indicates left or right channel, and can be configured as an output based on
the DIF2-0 inputs.
FS0
I
Sampling Frequency Select 0 Pin at Synchronous mode (Pull-down Pin)
CSN
I
Host Interface Chip Select Pin at Asynchronous mode (Pull-down Pin)
11
AKMODE
I
AK4112A Mode Pin at Audio routing mode (Pull-down Pin)
0: Non-AKM receivers mode, 1: AK4112A mode
FS1
I
Sampling Frequency Select 1 Pin at Synchronous mode (Pull-down Pin)
12
CDTI
I
Host Interface Data Input Pin at Asynchronous mode (Pull-down Pin)
FS2
I
Sampling Frequency Select 2 Pin at Synchronous mode (Pull-down Pin)
13
CCLK
I
Host Interface Bit Clock Input Pin at Asynchronous mode (Pull-down Pin)
FS3
I
Sampling Frequency Select 3 Pin at Synchronous mode (Pull-down Pin)
14
CDTO
O
Host Interface Data Output Pin at Asynchronous mode (Pull-down Pin)
15
C1
I
Channel Status Bit Input Pin for Channel 1
16
C2
I
Channel Status Bit Input Pin for Channel 2 (Pull-down Pin)
17
C3
I
Channel Status Bit Input Pin for Channel 3 (Pull-down Pin)
18
C4
I
Channel Status Bit Input Pin for Channel 4 (Pull-down Pin)
19
ANS
I
Asynchronous/Synchronous Mode Select Pin (Pull-up Pin)
0: Asynchronous mode, 1: Synchronous mode
20
BLS
I/O
Block Start Input/Output Pin (Pull-down Pin)
In normal mode, the channel status block output is "H" for the first four
bytes. In audio routing mode, the pin is configured as an input. When PDN=
"L", BLS pin goes "H" at Normal mode.
21
CKS0
I
Clock Mode Select 0 Pin (Pull-up Pin)
22
VSS
-
Ground Pin, 0V
ASAHI KASEI
[AK4101]
MS0076-E-01
2001/12
- 5 -
No. Pin
Name
I/O
Description
23
CKS1
I
Clock Mode Select 1 Pin (Pull-down Pin)
24
TXN4
O
Negative Differential Output Pin for Channel 4
25
TXP4
O
Positive Differential Output Pin for Channel 4
26
TXN3
O
Negative Differential Output Pin for Channel 3
27
TXP3
O
Positive Differential Output Pin for Channel 3
28 VDD
- Power Supply Pin, 4.75V
5.25V
29
VSS
-
Ground Pin, 0V
30
TXN2
O
Negative Differential Output Pin for Channel 2
31
TXP2
O
Positive Differential Output Pin for Channel 2
32
TXN1
O
Negative Differential Output Pin for Channel 1
33
TXP1
O
Positive Differential Output Pin for Channel 1
34
DIF0
I
Audio Serial Interface Select 0 Pin (Pull-down Pin)
35 VDD
- Power Supply Pin, 4.75V
5.25V
36
DIF1
I
Audio Serial Interface Select 1 Pin (Pull-down Pin)
37
DIF2
I
Audio Serial Interface Select 2 Pin (Pull-down Pin)
38
U1
I
User Data Bit Input Pin for Channel 1 (Pull-down Pin)
39
U2
I
User Data Bit Input Pin for Channel 2 (Pull-down Pin)
40
U3
I
User Data Bit Input Pin for Channel 3 (Pull-down Pin)
41
U4
I
User Data Bit Input Pin for Channel 4 (Pull-down Pin)
42
V12
I
Validity Bit Input Pin for Channel 1 & Channel 2
43
V34
I
Validity Bit Input Pin for Channel 3 & Channel 4 (Pull-down Pin)
44
TRANS
I
Audio Routing Mode (Transparent Mode) Pin at Synchronous mode
0: Normal mode, 1: Audio routing mode (Transparent mode)
Notes:
1. Internal pull-up and pull-down resistors are connected on-chip. The value of the resistors is 43k
(typ).
2. All input pins except internal pull-down/pull-up pins should not be left floating.
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