12

Preliminary

Setting up the board

The board has the following connectors and possible setups:

Clock Configuration Jumper (J9)

The clock jumper is only needed for operations involving the CODEC, the jumper allows selection

between the 13.824MHz and the 20.48MHz oscillator on the board. 13.824MHz is used for 8kHz

applications such as A-law or

µ-law CODEC operation. 20.48MHz is divided down to 44.1kHz to

interface using I

Using long or short frame sync in PCM mode is software selectable from the main application

window.

CODEC Jumper (J1)

In I

connected to SDI and vice versa.

I

When the DIP switches for SDA and SCL are on, both 5216s are controlled using the I

from the PC parallel port. Switching the I

the J10 header. Note that pull-ups must be provided by the external bus driver in that case.

CODEC Switches (SCK, WS, MCLK, SDI, SDIO)

The 5216 CODECs can be connected together or run separately depending on the switch setup.

The switches allow the clocks generated on the main board to be connected to the secondary

board as well, and the CODEC data lines allow digital communication between the devices.

The clocks are always connected to the main board, but switching the CODEC off allows the

secondary board to be controlled by another device using the J10 header.

Recommended power supply

The board can be driven by a 9V battery or a 5 to 9V DC supply with positive polarity rated at 500

mA