PCD3352CP Ver la hoja de datos (PDF) - Philips Electronics

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PCD3352CP

8-bit microcontrollers with DTMF generator and 128 bytes EEPROM

Philips Electronics 

Philips Semiconductors

8-bit microcontrollers with DTMF generator

and 128 bytes EEPROM

Product specification

PCA3351C; 52C; 53C;

PCD3351A; 52A; 53A

6.5 Modem frequencies

Again assuming an oscillator frequency fxtal = 3.58 MHz,

the standard modem frequencies can be implemented as

in Table 9. It is suggested to define the frequency by the

HGF register while the LGF register contains 00H,

disabling Low Group Frequency generation.

Table 9 Standard modem frequencies and their

implementation

HGF

VALUE

(HEX)

FREQUENCY (Hz)

MODEM GENERATED

9D

980(1)

978.82

82 1180(1)

1 179.03

8F 1070(2)

1 073.33

79 1270(2)

1 265.30

80 1200(3)

1 197.17

45 2200(3)

2 192.01

76 1300(4)

1 296.94

48 2100(4)

2 103.14

5C 1650(1)

1 655.66

52 1850(1)

1 852.77

4B 2025(2)

2 021.20

44 2225(2)

2 223.32

DEVIATION

(%) (Hz)

−0.12 −1.18

−0.08 −0.97

0.31 3.33

−0.37 −4.70

−0.24 −2.83

−0.36 −7.99

−0.24 −3.06

0.15 3.14

0.34 5.66

0.15 2.77

−0.19 −3.80

−0.08 −1.68

Notes

1. Standard is V.21.

2. Standard is Bell 103.

3. Standard is Bell 202.

4. Standard is V.23.

6.6 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 10). It is suggested to define the

frequency by the HGF register while the LGF contains

00H, disabling Low Group Frequency generation

Table 10 Musical scale frequencies and their

implementation

NOTE

D#5

E5

F5

F#5

G5

G#5

A5

A#5

B5

C6

C#6

D6

D#6

E6

F6

F#6

G6

G#6

A6

A#6

B6

C7

C#7

D7

D#7

HGF

VALUE

(HEX)

F8

EA

DD

D0

C5

B9

AF

A5

9C

93

8A

82

7B

74

6D

67

61

5C

56

51

4D

48

44

40

3D

FREQUENCY (Hz)

STANDARD(1) GENERATED

622.3

659.3

698.5

740.0

784.0

830.6

880.0

923.3

987.8

1 046.5

1 108.7

1 174.7

1 244.5

1 318.5

1 396.9

1 480.0

1 568.0

1 661.2

1 760.0

1 864.7

1 975.5

2 093.0

2 217.5

2 349.3

2 489.0

622.5

659.5

697.9

741.1

782.1

832.3

879.3

931.9

985.0

1 044.5

1 111.7

1 179.0

1 245.1

1 318.9

1 402.1

1 482.2

1 572.0

1 655.7

1 768.5

1 875.1

1 970.0

2 103.3

2 223.3

2 358.1

2 470.4

Note

1. Standard scale based on A4 @ 440 Hz.

1999 Oct 28

11

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