ISD-ES521 Nuvoton Technology Corporation of America, ISD-ES521 Datasheet - Page 12

• Manufacturer Part Number: ISD-ES521
• Manufacturer: Nuvoton Technology Corporation of America

Specifications of ISD-ES521

• Lead Free Status / RoHS Status: Supplier Unconfirmed

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 8 kHz
applications such as A-law or -law CODEC operation. 20.48MHz is divided down to 44.1 kHz to
2
interface using I
S.
Using long or short frame sync in PCM mode is software selectable from the main application
window.
CODEC Jumper (J1)
2
In I
S mode, the two SDIO lines are connected together, while in PCM mode the SDIO is
connected to SDI and vice versa.
2
I
C Switches (SDA, SCL)
2
When the DIP switches for SDA and SCL are on, both 5216s are controlled using the I
C bus
2
from the PC parallel port. Switching the I
C interface off allows control of the second 5216 from
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
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