參數(shù)資料
型號: HD40A4668
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(jī))
中文描述: 低電壓如同在微機(jī)芯片的DTMF產(chǎn)生電路(帶雙音多頻電路的低電壓微計算機(jī))
文件頁數(shù): 93/142頁
文件大?。?/td> 894K
代理商: HD40A4668
HD404669 Series
93
1
2
3
A
4
5
6
B
7
8
9
C
0
#
D
R1 (697Hz)
R2 (770Hz)
R3 (852Hz)
R4 (941Hz)
C
C
C
C
Figure 70 DTMF Keypad and Frequencies
Tone Generator Mode Register (TGM: $019):
The tone generator mode register (TGM: $019) is a 4-bit
write-only register that controls the generated DTMF frequencies as shown in figure 71. TGM is initialized
to $0 by an MCU reset or in stop mode, watch mode, and subactive mode.
Bit
Initial value
Read/Write
Bit name
3
0
W
TGM3
2
0
W
TGM2
0
0
W
TGM0
1
0
W
TGM1
Tone generator mode register (TGM: $019)
TGM3
0
0
1
1
TGM2
0
1
0
1
TONEC output frequencies
C1 (1,209 Hz)
C2 (1,336 Hz)
C3 (1,477 Hz)
C4 (1,633 Hz)
TGM1
0
0
1
1
TGM0
0
1
0
1
TONER
output frequencies
R1 (697 Hz)
R2 (770 Hz)
R3 (852 Hz)
R4 (941 Hz)
Figure 71 Tone Generator Mode Register (TGM)
相關(guān)PDF資料
PDF描述
HD40A4669 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(jī))
HD404668 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(jī))
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(jī))
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(jī))
HD404719FS Five timer/counters
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD40A4668H 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit
HD40A4669 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit
HD40A4669H 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit
HD40L4818H 制造商:Renesas Electronics Corporation 功能描述:
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