ml7084-001 Oki Semiconductor, ml7084-001 Datasheet - Page 208

• Manufacturer Part Number: ml7084-001
• Description: 4ch Voip Codec
• Manufacturer: Oki Semiconductor

Melody Generator (MGEN )
A block diagram of the melody generator is shown in Figure 59, and its operation is described below.
The MCU has a ROM embedded with tunes data (such as tempo, musical notes and musical scale), and can generate
melodies by making various settings for, and performing various controls of, the internal data memories and control
registers of this LSI. This LSI incorporates into it with an internal data memory for setting frequency data of 64
words and time data of 64 words at every three tracks. The MCU must convert musical scale to frequency (16 bits),
convert tempo and musical notes to time (16 bits), and set them in internal data memories.
(Note) Restrictions While in the High-Speed Melody Read Mode
If the melody generation function is used, stop all the functions described below on the DSP side that generates
melodies.
When activating a speech codec, do not activate it on the channel 1 side (SC_CH1EN=1).
• Tone generation function (TGEN0/TGEN1)
• Tone detection function (TONE_RXDET0/TONE_TXDET0, TONE_RXDET1/TONE_TXDET1)
• FSK generation function (FSKGEN0/FSKGEN1)
• Tone disabler detection function (TD_RXDET0/TD_TXDET0, TD_RXDET1/TD_TXDET1)
• DTMF detection function (DTMF_DET0/DTMF_DET1)
• Echo cancellers (EC0/EC1)
• Dial pulse detection function (DPDET0/DPDET1)
• Dial pulse transmission function (DPGEN0/DPGEN1)
• Timer (TIMER)
OKI Semiconductor
MGEN_TRACKC
MGEN_TRACKA
MGEN_TRACKB
MGEN_TRACKA
MGEN_TRACKB
MGEN_TRACKC
Figure 59 Block Diagram of Melody Generator
MGEN_GAINA
MGEN_GAINB
MGEN_GAINC
FADE_CONT
FADE_CONT
MGEN_FADE_PARAM (common)
FADE_CONT
MGEN_FOUT
MGEN_GAIN_TOTAL_FR
FEDL7224-001FULL-01
Speech Codec
Encoder
ML7224-001TC
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