參數(shù)資料
型號： PCD3755FH
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, PQFP32
封裝： 7 X 7 X 1.40 MM, PLASTIC, LQFP-32
文件頁數(shù)： 10/32頁
文件大?。?/td> 200K
代理商： PCD3755FH
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PDF資料
PDF描述
PCD3755FP 8-bit microcontrollers with DTMF generator, 8 kbytes OTP and 128 bytes EEPROM
PCD3755FT 8-bit microcontrollers with DTMF generator, 8 kbytes OTP and 128 bytes EEPROM
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相關代理商/技術參數(shù)
參數(shù)描述
PCD3755FP 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontrollers with DTMF generator, 8 kbytes OTP and 128 bytes EEPROM
PCD3755FT 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontrollers with DTMF generator, 8 kbytes OTP and 128 bytes EEPROM
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