TDA7529_11 Datasheet, PDF (31/61 Pages) STMicroelectronics – RF front-end for AM/FM DSP car-radio with IF sampling

TDA7529
Tuning state machine
5.1.5
Mode 100: jump
Figure 11. Jump timing diagram
%6%.43
BUS
34/0
EVENT
REGS
SWAP
4)-%
TRANSMISSIONWITHSUBADDRBIT WAIT4MS
!&3!-0,%
WAITFOR4PLLLOCK
WAIT4MS WAITUS
!&(/,$
"%/0%2!4)/.
MUTEAUDIO
HOLD
UNMUTEAUDIO
'!0'03
This mode is used to jump to a different frequency and stay there, with reception at the end
of the sequence.
AFHOLD can be used to tell the back-end to mute/unmute the audio and keep normal
processing on hold.
AFSAMPLE can be used to tell the back-end when the quality signal processing can be
restarted, with a stable situation to start from.
5.2
Mode 100: check
Figure 12. Check timing diagram
%6%.43
BUS
34/0
EVENT
REGS
SWAP
4)-%
TRANSMISSIONWITHSUBADDRBIT WAIT4MS
!&3!-0,%
WAITFOR4PLLLOCK
!&(/,$
"%/0%2!4)/.
MUTEAUDIO
HOLD
'!0'03
This mode is used to jump to a different frequency and stay there, with audio muted.
AFHOLD can be used to tell the back-end to mute/unmute the audio and keep normal
processing on hold.
AFSAMPLE can be used to tell the back-end when to freeze the quality signal processing.
Doc ID 13311 Rev 4
31/61