SNC82030
12-Channel MIDI/Speech Controller
38.5KHZ
"1"
P AD
IR e n
P 27
5.6. I/O Ports
There is two 8-bit I/O ports P0, P2. Any I/O can be individually programmed as either
input or output. When I/O is set to input, any valid data transition (H L or LH) of
each I/O port can wake-up the chip from power-down mode.
P AD
P ort Da ta
P ort S ta tus
We a k
To Inte rna l Da ta Bus
Re a d Control
I/O Port Configuration
Note: weak N-MOS’ can serve as pull-low resistors.
s
5.7. Sampling Rate Counters
Each voice channel of 12 is equipped with an independent sampling rate counter to
allow individual sample rate play back per channel. Channel sample rate play back
can be dynamically set from 4KHz to 64KHz. Each sampling rate counter is updated
on a period of 0.125uS. This architecture yields a high-quality music/voice synthesis
that sounds very close to its original source when played through the same amplifier
and speaker circuitry.
5.8. Auto Repetition
Each voice channel of 12 is equipped with a hardware auto repeat function. Auto
repeat functions are normally used to implement sustain in instrument synthesis but
can even be used to repeat any voice data of arbitrary length.
Ver: 1.5
7
Sep. 8, 2006
SONIX [ SONIX TECHNOLOGY COMPANY ]
