參數(shù)資料
型號(hào): HD4074654
廠商: Hitachi,Ltd.
英文描述: 4-Bit Single-Chip Microcomputer
中文描述: 4位單片機(jī)
文件頁(yè)數(shù): 79/109頁(yè)
文件大小: 430K
代理商: HD4074654
HD404654 Series
79
Sine wave
counter D/A
Transforma-
tion program
divider
Feedback
Sine wave
counter D/A
Transforma-
tion program
divider
Feedback
TONER
VT
ref
TONEC
TONER output control
TONEC output control
1/2
1/5
1/9
1/10
f
OSC
Tone generator
control register
(TGC)
System clock
selection register 1
(SSR1)
System clock
selection register 2
(SSR2)
400 kHz
2
2
2
1
Selector
Tone generator
mode register
(TGM)
I
400 kHz
800 kHz
2 MHz
3.58 MHz
4 MHz
Figure 64 Block Diagram of DTMF Generator Circuit
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