FEDL7033-02
ML7033
1
Semiconductor
CR2 (Pulse metering tone generator control)
B7
B6
B5
B4
B3
B2
B1
B0
PMG2
FRQ
PMG2
LV1
PMG2
LV0
PMG2
TOUT2
PMG1
FRQ
PMG1
LV1
PMG1
LV0
PMG1
TOUT1
CR2
default
0
0
0
0
0
0
0
0
B7
B6, B5
… Pulse metering tone frequency select for CH2
0 : 12 kHz
1 : 16 kHz
… Pulse metering tone level setting for CH2
(B6, B5) (0, 0) = OFF
(0, 1) = 0.5 Vpp
(1, 0) = 1.0 Vpp
(1, 1) = 1.5 Vpp
The level of the pulse metering tone, as shown in Figure 11, reaches the assigned level in
10 ms and gradually fades out over 10 ms.
The ramp-up and ramp-down times also apply when a tone is cancelled by writing (0,0)
into these register bits. Once the register bits are set, the tone begins to fade out and
completely fades out after 10 ms. In addition, subsequent writes to these bits are prohibited
for 10 ms.
Ramp down time=10ms
Ramp up time=10ms
Figure 11 Pulse Metering Tone Waveform
B4
… Pulse metering tone output pin select for CH2
0 : AOUT2 pin (added to voice signals)
1 : TOUT2 pin
B3
… Pulse metering tone frequency select for CH2
0 : 12 kHz
1 : 16 kHz
B2, B1
… Pulse metering tone level setting for CH1
(B2, B1) (0,0) = OFF
(0, 1) = 0.5 Vpp
(1, 0) = 1.0 Vpp
(1, 1) = 1.5 Vpp
The level of the pulse metering tone, as shown in Figure 11, reaches the assigned level in
10 ms and gradually fades over 10 ms.
The ramp-up and ramp-down times also apply when a tone is cancelled by writing (0,0)
into these register bits. In this case the tone fades out after 10 ms. In addition, subsequent
writes to these bits are prohibited for 10 ms.
B0
… Pulse metering tone frequency select for CH1
0 : 12 kHz
1 : 16 kHz
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