參數(shù)資料
型號: HD404668
廠商: Hitachi,Ltd.
英文描述: Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計算機)
中文描述: 低電壓如同在微機芯片的DTMF產(chǎn)生電路(帶雙音多頻電路的低電壓微計算機)
文件頁數(shù): 92/142頁
文件大?。?/td> 894K
代理商: HD404668
HD404669 Series
92
Sine wave
counter D/A
Transformation
program divider
Feedback
Sine wave
counter D/A
Transformation
program divider
Feedback
TONER
VT
ref
TONEC
TONER output control
TONEC output control
1/2
1/5
1/9
*
f
OSC
Tone generator
control register
(TGC)
System clock
select register 1
(SSR1)
System clock
select register 2
(SSR2)
400 kHz
*
2
2
2
Tone generator
mode register
(TGM)
2
Data bus
Clock line
Signal line
I
1/10
1/18
*
1/20
Note:
*
397.8 kHz when an f
OSC
frequency of 3.58 MHz or 7.16 MHz is used.
Figure 69 Block Diagram of DTMF Circuit
相關PDF資料
PDF描述
HD404669 Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計算機)
HD407A4669 Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計算機)
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HD404439FS Five timer/counters
HD4074719FS Five timer/counters
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