參數(shù)資料
型號： PCD3755FT
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 8-bit microcontrollers with DTMF generator, 8 kbytes OTP and 128 bytes EEPROM
中文描述： 8-BIT, OTPROM, 16 MHz, MICROCONTROLLER, PDSO28
封裝： 7.50 MM, PLASTIC, SO-28
文件頁數(shù)： 10/32頁
文件大?。?/td> 200K
代理商： PCD3755FT
1997 Apr 16
10
Philips Semiconductors
Product specification
8-bit microcontrollers with DTMF generator,
8 kbytes OTP and 128 bytes EEPROM
PCD3755A; PCD3755E;
PCD3755F
6.4
DTMF frequencies
Assuming an oscillator frequency f
xtal
= 3.58 MHz, the
DTMF standard frequencies can be implemented as
shown in Table 6.
The relationships between telephone keyboard symbols,
DTMF frequency pairs and the frequency register contents
are given in Table 7.
Table 6
DTMF standard frequencies and their
implementation; value = LGF, HGF contents
Table 7
Dialling symbols, corresponding DTMF
frequency pairs and frequency register contents
VALUE
(HEX)
FREQUENCY (Hz)
DEVIATION
STANDARD
GENERATED
(%)
(Hz)
DD
C8
B5
A3
7F
72
67
5D
697
770
852
941
1209
1336
1477
1633
697.90
770.46
850.45
943.23
1206.45
1341.66
1482.21
1638.24
0.13
0.06
0.18
0.24
0.21
0.42
0.35
0.32
0.90
0.46
1.55
2.23
2.55
5.66
5.21
5.24
TELEPHONE
KEYBOARD
SYMBOLS
DTMF FREQ.
PAIRS
(Hz)
LGF
VALUE
(HEX)
HGF
VALUE
(HEX)
0
1
2
3
4
5
6
7
8
9
A
B
C
D
#
(941, 1336)
(697, 1209)
(697, 1336)
(697, 1477)
(770, 1209)
(770, 1336)
(770, 1477)
(852, 1209)
(852, 1336)
(852, 1477)
(697, 1633)
(770, 1633)
(852, 1633)
(941, 1633)
(941, 1209)
(941, 1477)
A3
DD
DD
DD
C8
C8
C8
B5
B5
B5
DD
C8
B5
A3
A3
A3
72
7F
72
67
7F
72
67
7F
72
67
5D
5D
5D
5D
7F
67
6.5
Modem frequencies
Again assuming an oscillator frequency f
xtal
= 3.58 MHz,
the standard modem frequencies can be implemented as
in Table 8. It is suggested to define the frequency by the
HGF register while the LGF register contains 00H,
disabling Low Group Frequency generation.
Table 8
Standard modem frequencies and their
implementation
Notes
1.
2.
3.
4.
Standard is V.21.
Standard is Bell 103.
Standard is Bell 202.
Standard is V.23.
HGF
VALUE
(HEX)
FREQUENCY (Hz)
DEVIATION
MODEM
GENERATED
(%)
(Hz)
9D
82
8F
79
80
45
76
48
5C
52
4B
44
980
(1)
1180
(1)
1070
(2)
1270
(2)
1200
(3)
2200
(3)
1300
(4)
2100
(4)
1650
(1)
1850
(1)
2025
(2)
2225
(2)
978.82
1179.03
1073.33
1265.30
1197.17
2192.01
1296.94
2103.14
1655.66
1852.77
2021.20
2223.32
0.12
0.08
0.31
0.37
0.24
0.36
0.24
0.15
0.34
0.15
0.19
0.08
1.18
0.97
3.33
4.70
2.83
7.99
3.06
3.14
5.66
2.77
3.80
1.68
相關(guān)PDF資料
PDF描述
PCD4410 Tone/Pulse Telephone Dialer
PCD4413 Tone/Pulse Telephone Dialer
PCD4413A Tone/Pulse Telephone Dialer
PCD4415 Tone/Pulse Telephone Dialer
PCD4415A Tone/Pulse Telephone Dialer
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCD-40 制造商:Power Acoustik 功能描述:AM/FM/CD USB And SD Reader Autosound Head Unit 制造商:POWER ACOUSTIK 功能描述:AUTOSOUND HEAD UNIT AM/FM/CD USB AND SD READER
PCD-40-1050B 制造商:Mean Well 功能描述:PCD-40 series 40 W 1050 mA 38 V AC input 90-135 V Dimmable LED Driver Modules 制造商:Mean Well 功能描述:AC to DC Power Supply Enclosed LED Single Output 22-38 Volts 制造商:Mean Well 功能描述:LED POWER SUPPLY 40W 90 - 135VAC OR 180 - 295VAC IN 350 - 1750MA SLCT CURRENT
PCD-40-1400B 制造商:Mean Well 功能描述:AC to DC Power Supply Enclosed LED Single Output 17-29 Volts 制造商:Mean Well 功能描述:LED POWER SUPPLY 40W 90 - 135VAC OR 180 - 295VAC IN 350 - 1750MA SLCT CURRENT
PCD-40-1750B 制造商:Mean Well 功能描述:AC to DC Power Supply Enclosed LED Single Output 13-23 Volts 制造商:Mean Well 功能描述:LED Drivers Power Supplies 40.25W 13-23V 1750mA CC Dimmable LED PS 制造商:Mean Well 功能描述:LED POWER SUPPLY 40W 90 - 135VAC OR 180 - 295VAC IN 350 - 1750MA SLCT CURRENT
PCD-40-350B 制造商:Mean Well 功能描述:AC to DC Power Supply Enclosed LED Single Output 70-108 Volt 制造商:Mean Well 功能描述:LED POWER SUPPLY 40W 90 - 135VAC OR 180 - 295VAC IN 350 - 1750MA SLCT CURRENT
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*