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SN66120B 参数 Datasheet PDF下载

SN66120B图片预览
型号: SN66120B
PDF下载: 下载PDF文件 查看货源
内容描述: 4通道语音控制器 [4-Channel Speech Controller]
分类和应用: 控制器
文件页数/大小: 11 页 / 304 K
品牌: SONIX [ SONIX TECHNOLOGY COMPANY ]
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SN66120B  
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 SN66120B play sounds with accurate pitches in the case of music  
instrument synthesis.  
5.6. Auto repetition  
Auto repetition function helps SN66120B 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  
SN66120B.  
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 (HL or LH) of P1, P2 and P3 can reactivate the chip when it is in  
power-down stage.  
PAD  
To Internal Data Bus  
Read Control  
Weak  
Input Port Configuration (P10~P13)  
4
Ver: 1.1  
December 6, 2004