User Guide
HARDWARE DESCRIPTION
Rev. 0 | 5 of 23
Table 1. Connector and Jack Descriptions
Reference
Designator
Type
Functional Name
Description
S3
Single pole double throw
(SPDT) slide switch
S/PDIF source select
Select the optical S/PDIF input or coaxial S/PDIF input.
S4
Momentary switch
S/PDIF reset button
Push S4 to reset the S/PDIF receiver.
U4
Optical fiber connector
S/PDIF optical input
S/PDIF optical input.
J13 (I
2
S Input Selection Header)
The J13 is a 9-pin header. Pin 1, Pin 4, and Pin 7 of J13 are
GND, whereas Pin 2, Pin 5, and Pin 8 are used as signal inputs.
The outermost pins, Pin 3, Pin 6, and Pin 9, are connected to the
S/PDIF receiver I
2
S outputs. See
The I
2
S signals must be 1.8 V p-p.
Table 2. J13 9-Pin (3×3) Header Connections
Pin
Signal
Test Conditions/Comments
1, 4, 7
GND
GND
2
SDATA
5
FSYNC
SSM6515 frame sync input
8
BCLK
SSM6515 bit clock input
3
SDATA S/PDIF
S/PDIF serial data output
6
FSYNC S/PDIF
S/PDIF frame sync output
9
BCLK S/PDIF
S/PDIF bit clock output