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PCD3349AP Datasheet(PDF) 8 Page - NXP Semiconductors

Part # PCD3349AP
Description  8-bit microcontroller with DTMF generator
PDF  20 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCD3349AP Datasheet(HTML) 8 Page - NXP Semiconductors

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1998 May 11
8
Philips Semiconductors
Product specification
8-bit microcontroller with DTMF generator
PCD3349A
6.4
Modem frequencies
Again assuming an oscillator frequency fxtal = 3.58 MHz,
the standard modem frequency pairs summarized in
Table 5 can be implemented. It is suggested to define the
frequency by the HGF register while the LGF register
contains 00H, disabling Low Group Frequency generation.
Table 5
Standard modem frequency pairs and their
implementation
Notes
1. Standard is V.21.
2. Standard is Bell 103.
3. Standard is Bell 202.
4. Standard is V.23.
6.5
Musical scale frequencies
Finally, two octaves of musical scale in steps of semitones
can be realized, again assuming an oscillator frequency
fxtal = 3.58 MHz (Table 6). It is suggested to define the
frequency by the HGF register while the LGF contains
00H, disabling Low Group Frequency generation.
HGF
VALU
E
(HEX)
FREQUENCY (Hz)
DEVIATION
MODEM
GENERATED
(%)
(Hz)
9D
980(1)
978.82
−0.12 −1.18
82
1180(1)
1179.03
−0.08 −0.97
8F
1070(2)
1073.33
0.31
3.33
79
1270(2)
1265.30
−0.37 −4.70
80
1200(3)
1197.17
−0.24 −2.83
45
2200(3)
2192.01
−0.36 −7.99
76
1300(4)
1296.94
−0.24 −3.06
48
2100(4)
2103.14
0.15
3.14
5C
1650(1)
1655.66
0.34
5.66
52
1850(1)
1852.77
0.15
2.77
4B
2025(2)
2021.20
−0.19 −3.80
44
2225(2)
2223.32
−0.08 −1.68
Table 6
Musical scale frequencies and their
implementation
Note
1. Standard scale based on A4 at 440 Hz.
NOTE
HGF
VALUE
(HEX)
FREQUENCY (Hz)
STANDARD(1)
GENERATED
D#5
F8
622.3
622.5
E5
EA
659.3
659.5
F5
DD
698.5
697.9
F#5
D0
740.0
741.1
G5
C5
784.0
782.1
G#5
B9
830.6
832.3
A5
AF
880.0
879.3
A#5
A5
923.3
931.9
B5
9C
987.8
985.0
C6
93
1046.5
1044.5
C#6
8A
1108.7
1111.7
D6
82
1174.7
1179.0
D#6
7B
1244.5
1245.1
E6
74
1318.5
1318.9
F6
6D
1396.9
1402.1
F#6
67
1480.0
1482.2
G6
61
1568.0
1572.0
G#6
5C
1661.2
1655.7
A6
56
1760.0
1768.5
A#6
51
1864.7
1875.1
B6
4D
1975.5
1970.0
C7
48
2093.0
2103.3
C#7
44
2217.5
2223.3
D7
40
2349.3
2358.1
D#7
3D
2489.0
2470.4



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