CDB42L55 Cirrus Logic Inc, CDB42L55 Datasheet - Page 6

• Manufacturer Part Number: CDB42L55
• Description: Eval Bd Ultra Low Power Stereo Codec
• Manufacturer: Cirrus Logic Inc

Specifications of CDB42L55

• Main Purpose: Audio, CODEC
• Embedded: Yes, FPGA / CPLD
• Utilized Ic / Part: CS42L55
• Primary Attributes: 2 Stereo Analog Inputs, Stereo Line and Headphone Outputs, S/PDIF Transmitter and Receiver
• Secondary Attributes: GUI, USB, RS232, I2C Interfaces, USB or External or Battery Power Supply
• Product: Audio Modules
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 598-1506; CDB-42L55

6
2.3.2
2.4
2.4.1
2.4.2
2.5
Digital Output
FPGA
The FPGA controls the digital signal routing between the CS42L55, CS8406, CS8416, CS8421 (Tx SRC
and Rx SRC), PLL and the I/O stake header.
Configuration and routing selections for the FPGA are made using controls in the “Board Configuration” tab
of the Cirrus FlexGUI software.
Configuration of the CS8416 is made using controls in the “Board Configuration” tab of the Cirrus FlexGUI
software.
provide configuration examples and software details.
CS8421 Sample Rate Converter (Tx SRC to CS42L55)
The CS8421 Tx SRC receives PCM digital audio data from either the CS8416 S/PDIF receiver or the AP
PSIA header and synchronizes this data with the CS42L55, regardless of the CS42L55’s master and au-
dio clocks.
A complete description of the CS8421
face can be found in the CS8421 data sheet.
Configuration and routing selections for the CS8421 are made using controls in the “Board Configuration”
tab of the Cirrus FlexGUI software.
Mode Control” on page 10
CS8406 S/PDIF Digital Audio Transmitter
The CS8406 converts the PCM data generated from the CS42L55 (through the “Receive” (Rx) SRC) to
the standard S/PDIF data stream.
A complete description of the CS8406
face can be found in the CS8406 data sheet.
Configuration of the CS8406 is made using controls in the “Board Configuration” tab of the Cirrus FlexGUI
software.
provide configuration examples and software details.
CS8421 Sample Rate Converter (Rx SRC from CS42L55)
The CS8421 Rx SRC receives PCM digital audio data from the CS42L55 and synchronizes this data with
either the CS8406 S/PDIF transmitter or the AP PSIA headers, regardless of the CS42L55’s master and
audio clocks.
A complete description of the CS8421
face can be found in the CS8421 data sheet.
Configuration and routing selections for the CS8421 are made using controls in the “Board Configuration”
tab of the Cirrus FlexGUI
Mode Control” on page 10
Section 3 “Configuration Options” on page 8
Section 3 “Configuration Options” on page 8
software.Section 3 “Configuration Options” on page 8
provide configuration examples and software details.
provide configuration examples and software details.
Section 4 on page 10
Section 3 “Configuration Options” on page 8
(Figure 38 on page
(Figure 38 on page
(Figure 38 on page
provides software configuration details.
and
and
Section 4 “Software Mode Control” on page 10
Section 4 “Software Mode Control” on page 10
26) and a discussion of the digital audio inter-
26) and a discussion of the digital audio inter-
26) and a discussion of the digital audio inter-
and
and
Section 4 “Software
Section 4 “Software
CDB42L55
DS773DB1