Bluetooth Audio Module
Ehong Technology Co., Ltd
6.9.3. IEC 60958 Interface (SPDIF)
The IEC 60958 interface is a digital audio interface that uses bi-phase coding to minimise the
DC content of the transmitted signal and allows the receiver to decode the clock information
from the transmitted signal. The IEC 60958 specification is based on the 2 industry standards:
■ AES/EBU
■ Sony and Philips interface specification SPDIF
The interface is compatible with IEC 60958-1, IEC 60958-3 and IEC 60958-4.
The SPDIF interface signals are SPDIF_IN and SPDIF_OUT and are shared on the PCM
interface pins. The input and output stages of the SPDIF pins can interface to:
■ A 75Ω coaxial cable with an RCA connector, see Figure 11.
■ An optical link that uses Toslink optical components, see Figure 12.
Figure 11: Example Circuit for SPDIF Interface (Co-Axial)
Figure 12: Example Circuit for SPDIF Interface (Optical)
