QS1532
4. Application
4-1. Typical Hardware Configuration
< Usage with DAC Interface >
BCLK
MIDI_IN
31.25K bps
WCLK
QS1532
FDOUT
MCLK
16/18bit
D/AC
ROUT
LOUT
Pre-
AMP
AUDIO OUT
< Usage with CODEC Interface >
BCLK
DIN
MIDI_IN
31.25K bps
QS1532
WCLK
FDOUT
ROUT
LOUT
CODEC
Pre-
AMP
AUDIO OUT
MCLK
MIC INPUT
4-2. Recommended parallel interface
When selecting the parallel interface, the I/O pins CSB,WR,D7 to D0 are used as inputs to input midi data
and the PMIDI_RY are used as output to read the status of midi buffer in QS1532.
The parallel inferface becomes effective when the PMIDI_RY output at ‘H’ level. As this reason, The external
micom should have to check it before a midi data is written.
If the external micom couldn’t check its pin. the
Twi(
write pulse interval )time must have to longer than
40us to prevent midi buffer overlap. For the detail information refer to “5-1. AC/DC Characteristics”
4-3. Recommented Power circuit for QS1532
For prevent unstable reset from power niose, The bypass capacitor of 0.1uF should be placed on as near as
possible by QS1532. But the best solution to prevent it is that power of QS1532 supply after set on stable.
( Please refer to “Fig 1 Recommended power circuit” as next page )
MIDI synthesizer with special effects and 32M sound font ROM
ALTONICS [ ALTONICS CO., LTD. ]
