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參數資料
| 型號： | HT95CXXX |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | CID Type Phone 8-Bit MCU |
| 中文描述： | 刑事偵緝式電話8位微控制器 |
| 文件頁數： | 26/51頁 |
| 文件大?。?/td> | 384K |
| 代理商： | HT95CXXX |
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HT95CXXX
Rev. 1.50
26
May 26, 2005
DTMF Generator
The DTMF (Dual Tone Multiple-Frequency) signal generator is implemented in the telephone controller. It can generate
16 dual tones and 8 single tones from the DTMF pin. This generator also supports power down, tone on/off function.
The DTMF generator clock source is 3.58MHz, before using this function, the system operation mode must be at Nor-
mal mode.
The power down mode (D_PWDN=1) will terminate all the DTMF generator function, however, the registers DTMFC
and DTMFD are accessible at this power down mode. The duration of DTMF output should be handled by the software.
DTMFD register value could be changed as desired, the DTMF pin will output the new dual-tone simultaneously.
Bit No.
Label
R/W
Function
0
D_PWDN
DTMF generator power down
1: DTMF generator is at power down mode.
0: DTMF generator is at operation mode.
1
RO
Unused bit, read as 0
2
TONE
RW
Tone output enable
1: DTMF signal output is enabled.
0: DTMF signal output is disabled.
3
RW
Reserved, inhibit using.
4
RW
Reserved, inhibit using.
5
RO
Unused bit, read as 0
6
RW
Reserved, inhibit using.
7
RO
Unused bit, read as 0
DTMFC (20H) Register
Note: Bit3, 4, 6 of DTMFC are reserved, always keep the initial value.
Bit No.
Label
R/W
Function
3~0
TC4~TC1
RW
To set high group frequency
7~4
TR4~TR1
RW
To set low group frequency
DTMFD(21H) Register
Note: Bit3, 4, 6 of DTMFC are reserved, always keep the initial value.
The DTMFpin output is controlled by the combination of the D_PWDN, TONE, TR~TC value.
Control Register Bits
DTMF Pin Output Status
D_PWDN
TONE
TR4~TR1/TC4~TC1
1
x
x
0
0
0
x
1/2 VDD
0
1
0
1/2 VDD
0
1
Any valid value
16 dual tones or 8 signal tones, bias with 1/2 VDD
!
!
DTMF Output
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相關代理商/技術參數 |
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| HT95L000 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:CID Type Phone 8-Bit MCU |
| HT95L000-56SSOP-A | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:LCD Type Phone 8-Bit MCU |
| HT95L00P | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:LCD Type Phone 8-Bit MCU |
| HT95L00P-56SSOP-A | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:LCD Type Phone 8-Bit MCU |
| HT95L100 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:CID Type Phone 8-Bit MCU |
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