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Copyright 2012 Cirrus Logic, Inc.
DS886DB9
CDB47xxx Main Board System Description
CDB47xxx User’s Manual
1.3.2.3 Coaxial Digital Output (J35)
The coaxial digital output has the following characteristics:
• Connector Type: RCA Female
• Maximum Signal Output Level: 1Vp-p into 75
load
1.3.2.4 DSP Digital Audio Output (DAO) (J24 or DAO)
The DAO connector has the following characteristics:
• Connector Type: 2x10, 0.100 inch Male Header
• Absolute Maximum Signal Level: +3.6V
• Absolute Minimum Signal Level: -0.3V
1.3.3 DC Power Input (J2)
The DC power input has the following characteristics:
• Voltage Range: +9V
DC
TO
+12V
DC
• Minimum Power: 18W supply (2A @ 9V)
• Connector Type: 2mm female barrel connector with a positive center pin
1.3.4 External Control Header (JP1)
The control header has the following characteristics:
• Connector Type: 2x10, 0.100 inch Shrouded Male
• Absolute Maximum Signal Level: +3.6V
• Absolute Minimum Signal Level: -0.3V
This connector is the interface between the CS470xx DSP and an external host. This connector is used to
control the DSP when the on-board MCU is bypassed.
1.3.5 USB Connector (J25)
The control header has the following characteristics:
• Connector Type: USB Connector
• Absolute Maximum Signal Level: +5V
• Absolute Minimum Signal Level: -0.3V
1.3.6 On-Board Voltage Selection Headers (P1-P3)
The on-board voltage selection headers have the following characteristics:
• Connector Type: 1x2, 0.100 inch, Stake Header
The CDB47xxx is designed to operate from a single DC power input. The 9V power supply provided with
the kit is connected to the DC power input jack (J22) and is regulated down to the system voltages (5V,
3.3V, 1.8V). The power selection headers should be installed when using the DC wall supply. This is the
default mode of operation and should not need to be changed for most applications.
It is possible to bypass the regulated power supplies for any of the voltages by removing the jumper from
the appropriate power selection header, and connecting an external voltage supply to pin 2 of that
