GENERAL

The SAA2505H decodes multi-channel audio up to MPEG 7.1, AC-3 5.1 and pro-logic on a dual DSP core.

FEATURES

Hardware features

• Two 40 MIPS 20-bit DSP cores

• All input and output buffer RAM is on-chip

• Program ROM on-chip for all decoding modes

• Two I2S-bus inputs with normal, double and quad speed mode (slave only)

• Second serial input usable for ADC (Karaoke input)

• Three normal and double speed I2S-bus outputs (slave and master from 256 and 384fs)

• One normal, double, quad speed I2S-bus output (slave and master from 256 and 384fs)

• Japanese EIAJ serial input and output formats

• Sony Philips Digital Interface (SPDIF) output

• I2C-bus control (up to 400 kHz)

• 3.3 V supply with 5 V TTL compatible inputs/outputs

• Boundary scan for printed-circuit board testing.

Software features

• AC-3 up to 5.1 channels

• MPEG 2 L2 up to 7.1 channels

• MPEG 1 L2 (Video-CD) 2 channels at 44.1 kHz

• Dolby pro-logic decoding at 32, 44.1 and 48 kHz

• Output configuration for 7, 5, 4, 3, 2 and 1 channels with or without Low Frequency Enhancement (LFE)

• Bass redirection for small satellite loudspeakers plus subwoofer

• Karaoke voice mix

• Dynamic range compression (AC-3 and MPEG)

• Adjustable delay up to 15 ms for surround channels (1.5 kbyte words)

• Adjustable delay up to 5 ms for centre channel (250 words)

• Rounding to DAC word length

• Mute by pin and I2C-bus command

• AC-3 and MPEG bitstream information available via the I2C-bus

• Concealment of CRC errors

• SPDIF coded output

• Fully programmable SPDIF channel status information.

APPLICATIONS

The SAA2505H is intended for all markets where a multi-channel audio decoder for Dolby AC-3 and MPEG 2 is required.

Primary markets are for DVD video players, TV sets and audio/video amplifiers.