PCD3350A datasheet(10/36 Pages) PHILIPS

10 / 36 page

1996 Dec 18

Philips Semiconductors

Product speciﬁcation

8-bit microcontroller with DTMF generator,

256 bytes EEPROM and real-time clock

PCD3350A

6.6

Modem frequencies

Again assuming an oscillator frequency fxtal = 3.58 MHz,

the standard modem frequencies can be implemented as

in Table 7. It is suggested to define the frequency by the

HGF register while the LGF register contains 00H,

disabling Low Group Frequency generation.

Table 7

Standard modem frequencies and their

implementation

Notes

1. Standard is V.21.

2. Standard is Bell 103.

3. Standard is Bell 202.

4. Standard is V.23.

6.7

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 8). It is suggested to define the

frequency by the HGF register while the LGF contains

00H, disabling Low Group Frequency generation.

HGF

VALUE

(HEX)

FREQUENCY (Hz)

DEVIATION

MODEM

GENERATED

(%)

(Hz)

980(1)

978.82

−0.12 −1.18

1180(1)

1179.03

−0.08 −0.97

1070(2)

1073.33

0.31

3.33

1270(2)

1265.30

−0.37 −4.70

1200(3)

1197.17

−0.24 −2.83

2200(3)

2192.01

−0.36 −7.99

1300(4)

1296.94

−0.24 −3.06

2100(4)

2103.14

0.15

3.14

1650(1)

1655.66

0.34

5.66

1850(1)

1852.77

0.15

2.77

2025(2)

2021.20

−0.19 −3.80

2225(2)

2223.32

−0.08 −1.68

Table 8

Musical scale frequencies and their

implementation

Note

1. Standard scale based on A4 @ 440 Hz.

NOTE

HGF

VALUE

(HEX)

FREQUENCY (Hz)

STANDARD(1)

GENERATED

D#5

622.3

622.5

659.3

659.5

698.5

697.9

F#5

740.0

741.1

784.0

782.1

G#5

830.6

832.3

880.0

879.3

A#5

923.3

931.9

987.8

985.0

1046.5

1044.5

C#6

1108.7

1111.7

1174.7

1179.0

D#6

1244.5

1245.1

1318.5

1318.9

1396.9

1402.1

F#6

1480.0

1482.2

1568.0

1572.0

G#6

1661.2

1655.7

1760.0

1768.5

A#6

1864.7

1875.1

1975.5

1970.0

2093.0

2103.3

C#7

2217.5

2223.3

2349.3

2358.1

D#7

2489.0

2470.4

PCD3350A Datasheet(PDF) 10 Page - NXP Semiconductors

PCD3350A Datasheet(HTML) 10 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

Datasheet Descarga

Enlace URL