Continued from preceding page.
- Firmware writing function.
The firmware reading from SD ch1 and writing to the following devices:
Serial Flash connected SIO0.
eMMC/eSD connected SD ch0.
- JTAG (for debugger)
- Record and Playback
Compression method : MP31 (MPEG1/2/2.5 Layer3). Stereo/Mono compatible.
Sampling frequences : 8kHz, 11.025kHz, 12kHz, 16kHz, 22.05kHz, 24kHz, 32kHz, 44.1kHz, and 48kHz
Bitrate : 8kbps (*1) to 320kbps (for Decoder-VBR)
(*1) Encoder supports only Mono (one channel) for 8Kbps.
- Adjusting the playback speed
Fast playback : 1.0 times to 2.0 times 10 steps.
Slow playback : 0.5 times to 1.0 times 10 steps.
- Multipurpose filter
- Audio data automatic transfer function
The audio buffer executes the data transfer between internal SRAM (DMA) and the audio block.
Wait cycle(s) is inserted to the LPDSP32 access to the SRAM while the audio buffer accesses to internal
- Digital volume, digital mute, BEEP, and level meter
The interrupt generation function at the operation completion
(e.g. interrupt at mute completion).
- Audio timer
LR clock count and the interrupt generation function.
- Flexible PCM audio interface (two interfaces)
Master/Slave Mode Selectable
Data Formats : I2S mode etc.
- Sample Rate Converters
0.5times to 64 times conversion range.
- Digital microphone IF (2ch)
- Microphone amplifier 0/18/24/30dB (2ch)
- PGA with ALC -12dB to 35.25dB in 0.75dB steps (2ch)
- 16 bit ΔΣADC (2ch)
- Digital filter for 16 bits ΔΣDAC (2ch)
- AB class amplifier
The power supply only to AB class amplifier is possible (ISOLATED).
Thermal shutdown circuit built-in
Speaker amplifier (1ch BTL) 1dB to 4.5dB in 0.5dB steps
Maximum output 300mW @3.0V, Speaker = 8, 1dB
Headphone amplifier (2ch) 0dB to 3dB in 1dB steps (Only same gain setting to 2ch is possible)
Maximum output 5mW @3.0V, HeadPhone = 16, Rd (Series) = 33, 1dB
Continued on next page.
1 MPEG Layer-3 audio coding technology licensed from Fraunhofer IIS and Thomson.
Supply of this product does not convey license nor imply any right to distribute content created with this product in
revenue-generating broadcast systems (terrestrial, satellite, cable and/or other distribution channels), streaming
applications (via Internet, intranets and/or networks), other content distribution systems (pay-audio or audio-on-demand
applications and the like) or on physical media (compact discs, digital versatile discs, semiconductor chips, hard drives,
memory cards and the like).
Supply of this product does not convey license under the relevant intellectual property of Thomson and/or Fraunhofer
Gesellschaft nor imply any right to use this product in any finished end user or ready-to-use final product. An
independent license for such use is required. For details, please visit http://mp3licensing.com/.