pcd3349a NXP Semiconductors, pcd3349a Datasheet - Page 8

• Manufacturer Part Number: pcd3349a
• Description: 8-bit Microcontroller With Dtmf Generator
• Manufacturer: NXP Semiconductors

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