TDA7529 datasheet(32/60 Pages) STMICROELECTRONICS

32 / 60 page

Tuning state machine

TDA7529

32/60

5.3

Mode 110: load

Figure 13.

Load timing diagram

The content of the buffer and control registers is swapped. No transition occurs on the

AFHOLD and AFSAMPLE lines.

5.4

Mode 111: end

Figure 14.

End timing diagram

This mode is used to end sequences that terminate with muted audio, after the decision on

whether to stay to that frequency or jump to a different one has been taken.

AFHOLD can be used to tell the back-end to unmute the audio.

AFSAMPLE can be used to tell the back-end to restore normal quality signal processing.

Most of the wait times of the algorithm can actually be programmed.

The following table summarizes the minimum, maximum and default values of the

programmable wait times. The indicated values are valid only for the advised configuration

where the phase detector reference frequency is 100 kHz.

EVENTS

TIME

transmission with subaddr. bit 7 = 1

bus

STOP

event

regs

swap

AC00050

EVENTS

TIME

transmission with subaddr. bit 7 = 1

wait 50 us

AFSAMPLE

AFHOLD

B.E. OPERATION

unmute audio

bus

STOP

event

AC00051

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