MSM7502 Datasheet, PDF (28/35 Pages) OKI electronic componets – Multi-Function PCM CODEC

Gain control (transmit hold tone, PB tone, microphone input, handset input)
WRITE Mode
Address Data AD1 = 0, AD0 = 1
Control Data
DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
Description for Control
0 0 Typical transmit hold tone gain (–2 dB)
01
——
10
–3 dB with respect to the typical gain
–6 dB with respect to the typical gain
0
11
–9 dB with respect to the typical gain
00
Typical transmit PB tone gain (+4 dB)
01
—
10
–3 dB with respect to the typical gain
–6 dB with respect to the typical gain
010
11
–9 dB with respect to the typical gain
0 0 Typical handfree input gain (+20 dB)
01
——
10
–6 dB with respect to the typical gain
–9 dB with respect to the typical gain
1
11
—
00
Typical handset input gain (+12 dB)
01
—
10
–3 dB with respect to the typical gain
–6 dB with respect to the typical gain
11
–9 dB with respect to the typical gain
Remarks
Transmit hold tone gain = VOL3
Transmit PB tone gain = VOL4
Hold tone gain and PB tone
gain are set at a time.
At the initial setting, the typical gain is set.
Handfree input gain = VOL9
Handset input gain = VOL8
Handfree input gain and handset Input
gain are set at a time.
At the initial setting, the typical gain is set.