ml7033 Oki Semiconductor, ml7033 Datasheet - Page 39

• Manufacturer Part Number: ml7033
• Description: Dual-channel Line Card Codec
• Manufacturer: Oki Semiconductor

CR11 (Ringing_ON and Trapezoid crest factors control)
B7
B6 to B4
B3
B2 to B0
1 Semiconductor
default
CR11
RING
… CH2 Tone Generator 1 (TG1) function select
… CH2 ringing tone waveform setting
… CH1 TG1 function select
… CH1 ringing tone waveform setting
CH2
B7
0
Vp
TG1 TRP2
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.
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.
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.
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.
B6/B2
0
0
0
0
1
1
1
1
CH2TG1
TRP2
B6
0
a
Figure 13 Ringing Tone Waveform
TG1 TRP1
1
Table 15 Crest Factor Setting
B5/B1
CH2TG1
a
0
0
1
1
0
0
1
1
TRP1
B5
0
TG1 TRP0
CH2TG1
B4/B0
TRP0
B4
0
1
0
1
0
1
0
1
0
CrestFacto
RING
CH1
B3
0
r
Crest Factor
/ 1
1.225
1.250
1.275
1.300
1.325
1.350
1.375
OFF
CH1TG1
TRP2
B2
1
0
4
a
3 /
CH1TG1
TRP1
B1
0
FEDL7033-02
CH1TG1
ML7033
TRP0
B0
0
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