STI5107 STMicroelectronics, STI5107 Datasheet - Page 11

• Manufacturer Part Number: STI5107
• Description: Low-cost Interactive Set-top Box Decoder
• Manufacturer: STMicroelectronics

STi5107
2.9
2.10
Audio subsystem
The audio subsystem supports audio decoding of MPEG-1 layers I, II.
Simultaneous MPEG-1 audio decoding and compressed output of Dolby streams on the
S/PDIF is supported.
Audio sample rates of 32 kHz, 44.1 kHz and 48 kHz are supported.
The audio subsystem is illustrated in
Figure 9.
The audio subsystem consists of the following units:
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Central DMA controller
The STi5107 has a multichannel, burst-capable direct memory access controller that
supports the following:
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audio decoder,
S/PDIF player, PCM player,
integrated 24-bit stereo audio DAC system,
audio/digital frequency synthesizer: generates the PCM and sample rate clocks.
fast 2D unaligned memory to memory transfers of graphics and stills,
real time stream transfers to and from memory with or without pacing. These channels
are suitable for transfers with external peripherals, for audio and video stream transfers
within the STi5107.
Memory
LMI
Audio subsystem
CPU
FDMA
DMA request
DMA request
DMA request
DMA request
Interrupts
Figure
decoder
Audio
9.
PCM player
System interconnect
Architecture features
S/PDIF
ADAC
player
FS
S/PDIF output
analog
outputs
Stereo
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