ML7041 데이터 시트보기 (PDF) - Unspecified

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ML7041

Audio CODEC

Unspecified 

FEDL7041-05

ML7041

CR2 (PCM CODEC operating mode setting and transmit/receive gain adjustment)

CR2

Initial Value

B7

B6

B5

B4

B3

B2

B1

B0

TX

ON/OFF

TX GAIN2 TX GAIN1 TX GAIN0

RX

ON/OFF

RX GAIN2 RX GAIN1

RX GAIN0

0

0

1

1

0

0

1

1

B7.................. Transmit side PCM signal ON/OFF

0: ON 1: OFF

B6, B5, B4 ..... Transmit side signal gain adjustment (refer to Table 2)

B3.................. Receive side PCM signal ON/OFF

0: ON 1: OFF

B2, B1, B0 ..... Receive side signal gain adjustment (refer to Table 2)

B6

B5

B4

0

0

0

0

0

1

0

1

0

0

1

1

1

0

0

1

0

1

1

1

0

1

1

1

Table 2 Transmit/Receive Gain Settings

Transmit Gain

B2

B1

B0

–6 dB

0

0

0

–4 dB

0

0

1

–2 dB

0

1

0

0 dB

0

1

1

+2 dB

1

0

0

+4 dB

1

0

1

+6 dB

1

1

0

+8 dB

1

1

1

Receive Gain

–12 dB

–9 dB

–6 dB

–3 dB

0 dB

+3 dB

+6 dB

+9 dB

The above gain settings table shows the transmit/receive voice signal gain settings and the transmit side

gain settings for DTMF tones and other tones. The DTMF and other tone transmit signals are enabled

by CR4-B6, and the gain setting is referenced to the levels shown below.

DTMF tones (low group): .............................. –16 dBm0

DTMF tones (high group) and other tones:... –14 dBm0

For example, if the transmit gain set value is set to +8 dB (B6, B5, B4) = (1,1,1), then the following tones

are output at the PCMOUT pin.

DTMF tones (low group): .............................. –8 dBm0

DTMF tones (high group) and other tones:... –6 dBm0

Gains of the side tone (path to receive side from transmit side) and the receive side tone can be set by

register CR3.

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