YSS950 Datasheet, PDF (20/30 Pages) YAMAHA CORPORATION – DAP1 Digital Audio Processor

YSS950


































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Status
These informations are notified from LSI.
<̍> Interrupt report
<̎> Auto mute report
<̏> Sampling frequency report
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General-Purpose I/O Ports
General-purpose I/O ports GPIO3 to GPIO0 implement the following functions. I/O polarity switching is
performed by GPIOD[3:0].
<1> Input port:
Pin status is read via GPI[3:0].
<2> Output port:
GPO[3:0] or DSP status is output to a pin. Switching of output contents is performed by GPOSEL[3:0].
<3> Chip address port:
The port is used as chip address input for selection of a chip to share (CAE=1)..
GPOSEL[x]
(register)
GPIOD[x]
(register)
GPI[x]
(register)
CA comparison
GPO[x]
(register)
sel
DSP Status[x]




Pull-up circuit
GPIOx
(pin)
20