SPEAR1340 datasheet(30/200 Pages) STMICROELECTRONICS

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Device functions

SPEAr1340

30/200

Doc ID 023063 Rev 4

2.26

I2S digital audio ports (I2S)

The I2S controller is a highly configurable IP for use in audio applications. It provides a

simple interface to standard audio components.

Main features:

●

Compliant to Philips I2S serial bus specifications

●

I2S master for output operations and I2S slave for input operations

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Configurable number of stereo channels (up to 4) for both transmitter and receiver

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Supports up to 7.1 audio Tx and Rx

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Supports 12-/16-/20-/24-/32-bit audio data interface

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Fully synchronous design with serial clock and system clock

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Interrupt support for reporting FIFO and other conditions

●

Programmable FIFO thresholds

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Supports data exchange to the system memory through DMA interface

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Software controlled block resets and enables

●

Software controlled FIFO flush

2.27

S/PDIF digital audio port

The S/PDIF audio interface detects bi-phase encoded S/PDIF signals, and plays PCM audio

data or audio encoded bit streams stored in memory in the S/PDIF format.

Main features:

Input

●

Fully compliant with IEC-60958 for audio data

●

Supports typical audio sampling frequencies, such as 32, 44.1, 48, 96, and 192 kHz.

●

Programmable DMA trigger threshold

●

VUCP storage can optionally be disabled

●

Audio data can be stored in bit lengths of 16 to 24 bits

Output

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Compliant with IEC-60958 for audio data and IEC-61937 for compressed audio data

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Supports typical audio sampling frequencies such as 32, 44.1, 48, 96, and 192 kHz

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Supports one-bit audio mode (HDMI)

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Supports DTS-HD mode

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Programmable system DMA trigger limit

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Programmable VUCP insertion

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Supports 16/0 or 16/16 audio data format in memory

2.28

Keyboard controller (KBD)

The GPIO keyboard controller integrated in SPEAr1340 offers a 3-mode input and output

port. It provides an12-bit GPIO, or 6x6 keyboard, or 2x2 keyboard plus 8-bit GPIO, and

offers an interface to the industry standard APB bus.

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