AVR 3550 - Harman Kardon Audio Service Manual (repair manual). Page 12

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PIN/FUNCTION 
 
No. Pin 
Name 
I/O 
Function 
IPS0 
Input Channel Select 0 Pin in Parallel Mode 
RX4 
Receiver Channel 4 Pin in Serial Mode (Internal biased pin) 
2 NC(AVSS) 
No Connect 
No internal bonding. This pin should be connected to AVSS. 
DIF0 
Audio Data Interface Format 0 Pin in Parallel Mode 
RX5 
Receiver Channel 5 Pin in Serial Mode (Internal biased pin) 
4 TEST2 
TEST 2 pin 
This pin should be connect to AVSS. 
DIF1 
Audio Data Interface Format 1 Pin in Parallel Mode 
RX6 
Receiver Channel 6 Pin in Serial Mode (Internal biased pin) 
6 NC(AVSS) 
No Connect 
No internal bonding. This pin should be connected to AVSS. 
DIF2 
Audio Data Interface Format 2 Pin in Parallel Mode 
RX7 
Receiver Channel 7 Pin in Serial Mode (Internal biased pin) 
IPS1 
Input Channel Select 1 Pin in Parallel Mode 
IIC I 
IIC Select Pin in Serial Mode. 
“L”: 4-wire Serial, “H”: IIC 
9 P/SN 
Parallel/Serial Select Pin 
“L”: Serial Mode, “H”: Parallel Mode 
10 
XTL0 
X’tal Frequency Select 0 Pin 
11 
XTL1 
X’tal Frequency Select 1 Pin 
12 
VIN 
V-bit Input Pin for Transmitter Output 
13 
TVDD 
Input Buffer Power Supply Pin, 3.3V or 5V 
14 NC 
No Connect 
No internal bonding. This pin should be open or connected to DVSS. 
15 
TX0 
Transmit Channel (Through Data) Output 0 Pin 
16 TX1 
When TX bit = “0”, Transmit Channel (Through Data) Output 1 Pin. 
When TX bit = “1”, Transmit Channel (DAUX Data) Output Pin (Default). 
17 BOUT 
Block-Start Output Pin for Receiver Input 
“H” during first 40 flames. 
18 
COUT 
C-bit Output Pin for Receiver Input 
19 
UOUT 
U-bit Output Pin for Receiver Input 
20 
VOUT 
V-bit Output Pin for Receiver Input 
21 
DVDD 
Digital Power Supply Pin, 3.3V 
22 
DVSS 
Digital Ground Pin   
23 
MCKO1 
Master Clock Output 1 Pin 
24 
LRCK 
I/O 
Channel Clock Pin 
25 
SDTO 
Audio Serial Data Output Pin 
26 
BICK 
I/O 
Audio Serial Data Clock Pin 
27 
MCKO2 
Master Clock Output 2 Pin 
28 
DAUX 
Auxiliary Audio Data Input Pin 
29 
XTO 
X'tal Output Pin 
30 
XTI 
X'tal Input Pin 
 
       DIR IC PIN FUNCTION (AK4114VQ) : IC75
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