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SN66012B Datasheet(PDF) 4 Page - SONiX Technology Company

Part # SN66012B
Description  4-Channel Speech Controller
Download  11 Pages
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Manufacturer  SONIX [SONiX Technology Company]
Direct Link  http://www.sonix.com.tw
Logo SONIX - SONiX Technology Company

SN66012B Datasheet(HTML) 4 Page - SONiX Technology Company

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SN66012B
4-Channel Speech Controller
5.5. Sampling Rate Counters
4 independent sampling rate counters are dedicated to 4 individual voice channels to
play voices with different playing rates. The playing rate is programmable from 4KHz
to 40KHz. The resolution of sampling period of each sampling rate counter is 0.25 uS.
This feature helps SN66012B play sounds with accurate pitches in the case of music
instrument synthesis.
5.6. Auto repetition
Auto repetition function helps SN66012B realize a “looping” sound automatically by
hardware without any software effort.
Auto repetition function is a very useful
mechanism to implement “Sustain” sound in instrument synthesis. All 4 channels are
equipped with this function. Arbitrary lengths of looping sound are accepted by
SN66012B.
5.7. I/O Ports
P1 is a 4-bit input port, P2/P3 are two 4-bit I/O ports and P4 is a 4-bit output port.
Any bit of P2 and P3 can be programmed to be input or output individually. Any
valid data transition (H
L or L H) of P1, P2 and P3 can reactivate the chip when
it is in power-down stage.
To Internal Data Bus
Read Control
PAD
Weak
Input Port Configuration (P10~P13)
Ver: 1.1
December 6, 2004
4


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