ML7033 datasheet(39/51 Pages) OKI

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FEDL7033-02

1Semiconductor

ML7033

39/51

CR11 (Ringing_ON and Trapezoid crest factors control)

CR11

CH2

RING

CH2TG1

TRP2

CH2TG1

TRP1

CH2TG1

TRP0

CH1

RING

CH1TG1

TRP2

CH1TG1

TRP1

CH1TG1

TRP0

default

000

… CH2 Tone Generator 1 (TG1) function select

0 : CH2TG1 works as a non-ringing tone generator (300 to 3400 Hz)

1 : CH2TG1 works as a ringing tone generator (15 to 50 Hz)

The frequency and level of CH2TG1 are set by CR16 to CR17.

B6 to B4

… CH2 ringing tone waveform setting

This 3-bit field determines the type of ringing tone waveform for TG1 on CH2. A

sinusoidal waveform, or a trapezoidal waveform with a crest factor between 1.225 V and

1.375 V at 0.025 V intervals, can be selected as shown in Table 15. For a definition of

‘crest factor’, refer to Figure 13. These bits are valid when the CH2RING (CR11-B7) bit is

set.

… CH1 TG1 function select

0 : CH1TG1 works as a non-ringing tone generator (300 to 3400 Hz)

1 : CH1TG1 works as a ringing tone generator (15 to 50 Hz)

The frequency and level of CH1TG1 are set by CR9 to CR10.

B2 to B0

… CH1 ringing tone waveform setting

This 3-bit field determines the type of ringing tone waveform for TG1 on CH1. A

sinusoidal waveform, or a trapezoidal waveform with a crest factor between 1.225 V and

1.375 V at 0.025 V intervals, can be selected as shown in Table 15. For a definition of

‘crest factor’, refer to Figure 13. These bits are valid when the CH1RING (CR11-B3) bit is

set.

Figure 13 Ringing Tone Waveform

Table 15 Crest Factor Setting

B6/B2

TG1 TRP2

B5/B1

TG1 TRP1

B4/B0

TG1 TRP0

Crest Factor

OFF

1.225

1.250

1.275

1.300

1.325

1.350

1.375

CrestFacto

−

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