adau1442 Analog Devices, Inc., adau1442 Datasheet - Page 34

• Manufacturer Part Number: adau1442
• Description: Sigmadsp Digital Audio Processor With Flexible Audio Routing Matrix
• Manufacturer: Analog Devices, Inc.

Packed TDM4 Mode
A special TDM mode is available that allows four channels to be
fit into a space of 64 bit clock cycles. This mode is called packed
TDM4 mode, or MOST
Transport) is a networking standard intended for interconnecting
multimedia components in automobiles and other vehicles. Many
ICs intended to interface with a MOST bus use a packed TDM4
data format.
TM
(4 CHANNELS)
SDATA_OUTx
(64 PERIODS)
mode. MOST (Media Oriented Systems
SDATA_INx,
(1 PERIOD)
LRCLKx
BCLKx
16 BITS
Figure 29. Packed TDM4 Mode
Rev. PrA | Page 34 of 92
16 BITS
For this mode to be used, the serial port must be set up with the
following register settings:
•
•
•
See Figure 29 for a timing diagram of packed TDM4 mode. This
figure is shown with a negative BCLK polarity, a negative LRCLK
polarity, and an MSB delay of 1.
Packed TDM4 mode
Left-justified or delay by 1
Word length of 16 bits
16
BITS
16
BITS