CDB42438 Cirrus Logic Inc, CDB42438 Datasheet - Page 12

• Manufacturer Part Number: CDB42438
• Description: Eval Bd 108dB 6&8ch Multi-Chnl CODECs
• Manufacturer: Cirrus Logic Inc

Specifications of CDB42438

• Main Purpose: Audio, CODEC
• Embedded: Yes, FPGA / CPLD
• Utilized Ic / Part: CS42438
• Primary Attributes: 6 Single-Ended and 2 Differential Analog Inputs and 8 Outputs, S/PDIF Transmitter and Receiver
• Secondary Attributes: Graphic User Interface
• Description/function: Audio CODECs
• Operating Supply Voltage: 5 V to 12 V
• Product: Audio Modules
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: CS42438
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant, Contains lead / RoHS non-compliant
• Other names: 598-1500

3.4.
The graphical description below shows the routing topology of the TDM converter between the
CS42438, CS8416, CS8406 and DSP Header. Refer to register “TDM Conversion (address
01h)” on page 16 for configuration settings.
The TDMer allows the user to easily evaluate the CS42438 in the TDM digital interface format.
A 256Fs clock and an FS pulse is derived from either the CS8416 or DSP Header. Data is mul-
tiplexed onto one data line and transmitted to the DAC. Likewise, data from the ADC of the
CS42438 is de-multiplexed and transmitted to the CS8406.
The TDMer is also capable of transmitting the de-multiplexed data to the DSP Header; however,
the user must re-time this data using a DSP. The CDB42438 does not provide an option for rout-
ing the TDM2PCM clocks to the DSP Header.
12
Internal TDM Conversion, MUXing and Control (TDMer)
DSP Header
= Other logic prior to input/output pin of FPGA not shown.
CS8416
CS8406
DSP_DOUT
DSP_SCLK
DSP_FS
SDOUT
LRCK
SCLK
LRCK
SCLK
SDIN
T2P_LRCK
T2P_SCLK
DSP_FS
CS8416_LRCK
CS8416_SCLK
DSP_SCLK
CS8416_SDOUT
DSP_DOUT
D_MUX[2:0]
ADC1
ADC2
ADC3
AUX
TDMer
Figure 5. TDMer
DSP/CS8416
SLOT1
SLOT2
SLOT3
SLOT4
TDM2PCM
PCM2TDM
MCLK
Clocks
Clocks
Data
Data
TDM Stream
256Fs SCLK
FS
FS
ADC_SDOUT
SCLK
DAC_SDIN
CDB42438
CS42438
DS646DB2