P0304 Terasic Technologies Inc, P0304 Datasheet - Page 51

• Manufacturer Part Number: P0304
• Description: DE2-70 CALL FOR ACADEMIC PRICING
• Manufacturer: Terasic Technologies Inc
• Type: FPGAr

Specifications of P0304

• Contents: DE2-70 Board, Power Supply, Cables, Plastic cover and software
• For Use With/related Products: Cyclone II 2C70
• For Use With: P0033 - BOARD ADAPTER HSMC TO GPIOP0006 - BOARD ADAPTER THDB-SUMP0001 - MODULE DIGITAL CAMERA 5MP (D5M)P0307 - KIT DEV 4.3" LCD TOUCH PANEL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: DE2-70

5.8 Using the 24-bit Audio CODEC
The DE2-70 board provides high-quality 24-bit audio via the Wolfson WM8731 audio CODEC
(enCOder/DECoder). This chip supports microphone-in, line-in, and line-out ports, with a sample
rate adjustable from 8 kHz to 96 kHz. The WM8731 is controlled by a serial I2C bus interface,
which is connected to pins on the Cyclone II FPGA. A schematic diagram of the audio circuitry is
shown in Figure 5.14, and the FPGA pin assignments are listed in Table 5.12. Detailed information
for using the WM8731 codec is available in its datasheet, which can be found on the manufacturer's
web site, or in the Datasheet/Audio CODEC folder on the DE2-70 System CD-ROM.
AUD_ADCLRCK
AUD_DACLRCK
AUD_ADCDAT
AUD_DACDAT
Signal Name
AUD_BCLK
AUD_XCK
I2C_SCLK
I2C_SDAT
Table 5.12. Audio CODEC pin assignments.
Figure 5.14. Audio CODEC schematic.
FPGA Pin No.
PIN_G18
PIN_D17
PIN_H18
PIN_F19
PIN_E19
PIN_F18
PIN_E17
PIN_J18
48
Audio CODEC Bit-Stream Clock
Audio CODEC ADC LR Clock
Audio CODEC DAC LR Clock
Audio CODEC Chip Clock
Audio CODEC ADC Data
Audio CODEC DAC Data
Description
I2C Clock
I2C Data
DE2-70 User Manual