Datasheet

Product data sheet Rev. 03 — 20 March 2008 59 of 107

NXP Semiconductors

TEF6901A

Integrated car radio

[1] Setting MTC is also in use for setting the timing of weak signal soft mute control during radio operation.

[1] Setting MST is also in use for setting the start of weak signal soft mute control during radio operation.

[1] Setting MSL is also in use for setting the slope of weak signal soft mute control during radio operation.

Table 80. Dynamic compression timing; MTC[2:0] of data byte 0Bh; TIMING

[1]

MTC2 MTC1 MTC0 t

attack

recovery

0 0 0 0.02 s 0.03 s

0 0 1 0.02 s 0.06 s

0 1 0 0.02 s 0.2 s

0 1 1 0.02 s 5 s

1 0 0 0.02 s 0.6 s

1 0 1 0.02 s 10 s

1 1 0 0.02 s 1 s

1 1 1 0.02 s 2 s

Table 81. Dynamic compression start; MST[2:0] of data byte 0Eh; SOFTMUTE

[1]

MST2 MST1 MST0 Compression range

0 0 0 reserved

0 0 1 reserved

0 1 0 reserved

0 1 1 start = 4 dBV; 2:1range = 2 dB

1 0 0 start = −4 dBV; 2:1range = 6 dB

1 0 1 start = −12 dBV; 2 : 1 range = 10 dB

1 1 0 start = −20 dBV; 2 : 1 range = 14 dB

1 1 1 start = −34 dBV; full range (2:1=18dB)

Table 82. Dynamic compression slope; MSL[1:0] of data byte 0Eh; SOFTMUTE

[1]

MSL1 MSL0 Compression ratio

0 0 4 : 3; full range = 9 dB

0 1 standard compression (2 : 1); full range = 18 dB

1 0 4 : 1; full range = 27 dB

1 1 limiting; full range = 36 dB