CDB47xxx Main Board System Description
CDB47xxx User’s Manual
DS886DB9
Copyright 2012 Cirrus Logic, Inc
1-6
1.3.1.3 Optical Digital Input (J21)
Optical digital inputs have the following characteristics:
• Connector Type: Fiber Optic RX for Digital Audio, JIS F05 (TOSLINK)
1.3.1.4 Coaxial Digital Input (J4)
Coaxial digital inputs have the following characteristics:
• Connector Type: RCA Female
• Input Impedance: 75
• Maximum Signal Level: 1.5Vp-p
• The CDB47xx-S, CDB47xx-D Rev B can accept 500mV Vpp signal to be amplified so that the S/
PDIF Rx pin on the DSP gets a digital signal with 2V swing compatible with Vih and Vil input voltage
thresholds of the DSP.
1.3.1.5 Microphone Input (J9)
The microphone input has a stereo connector, but only the LEFT channel is used for the microphone
input. This input has the following characteristics:
• Connector Type: 3.5mm (1/8”) Stereo Female
• Absolute Maximum Signal Level: 8Vp-p
• Full Scale Amplitude: 20mVp-p
1.3.1.6 DSP Digital Audio Input (DAI) (J18 or DAI)
The DAI 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
1.3.2 Audio Outputs
1.3.2.1 Main Analog Line-level Outputs (CDB47xxxS and CDB47xxxD) (J5-J8, J10-J13, or
AOUT_1 - AOUT_8)
Analog line-level outputs are RCA connectors on both the single-ended and differential boards. The
CDB47xxxD board has a differential to single-ended amplifier that feeds the RCA connectors. The outputs
have the following characteristics:
• Connector Type: RCA Female
• Full Scale Amplitude: 2V
RMS
1.3.2.2 Optical Digital Output (J1)
The optical digital output has the following characteristics:
• Connector Type: Fiber Optic TX for Digital Audio, JIS F05 (TOSLINK)
