Panasonic PAN9026 Product Specification page 64

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4.3.7.2 TDM Interface
Interface Signals
Module
Pin No
A1 PCM_DOUT
B1 PCM_CLK
B2 PCM_DIN
B3 PCM_SYNC
The TDM Interface follows the electrical specifications of the PCM Interface
Interface.
Operation
The TDM interface is a 3/4-wire bus interface for audio data transmission among different
devices connected to the bus. Taking principles from the PCM interface, it is designed to
simplify implementation while satisfying system bandwidth needs with a single bus.
The audio streams are multiplexed on the same data lines in TDM format. The data lines are bi-
directional, because any device can transmit data and receive data from any other device.
Product Specification Rev. 0.1
Signal Name Specification
Name
DOUT
BCLK
DIN
FSYN
There are four signals that connect all devices on the bus. Each device has a
master or slave capability on the BCLK and FSYN lines, but there can only be
one master at a time.
Only one peripheral can drive the bus at a time, but multiple peripherals can
read from the bus simultaneously.
Type Description
Output Serial data output
Input TDM bit clock signal
Input Serial data input
Input TDM frame synchronization
PAN9026 Wi-Fi/BT Module
4 Specification
 4.3.7.1
PCM
Page 64