TEA5764UK/N2,027 NXP Semiconductors, TEA5764UK/N2,027 Datasheet - Page 26

• Manufacturer Part Number: TEA5764UK/N2,027
• Description: Tuners FM RADIO WITH RDS
• Manufacturer: NXP Semiconductors

Specifications of TEA5764UK/N2,027

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935278071027 TEA5764UK-G

Philips Semiconductors
TEA5764UK_2
Product data sheet
10.2 DAV-B processing mode / fast PI search mode
Figure 9
interrupt flags are being set.
This mode is used, for example, when the receiver has been re-tuned to a new station,
and a fast search of the PI code, always contained in the A or C’ block, is required. The
diagram shown in
and is performing a synchronization search.
During synchronization search the decoder does not set the DAVFLG until a valid A or C’
block is detected. If a valid B block is detected immediately, then the decoder is now
synchronized and bit SYNC is set to logic 1. In fact, if any 2 good blocks in a valid order
are detected, the RDS decoder will synchronize and give an interrupt.
Fig 9. DAV-A timing diagram, DAV-A/B: normal
registers:
decoder
t
INT_RD
on read BL register
DAVN = 0, cleared
(1) If there is no read cycle, B
(2) Data is not transferred to BL register at the end of the read period/clear DOVF, D
(3) In order not to lose D
(4) DOVF is cleared when the BL register is read. To be of use, DOVF has to be read before BL
(5) To prevent DOVF being set again, an extra read of BL must be performed before A2 has been
read intflg
on falling edge
DAVFLG set
Bit DOVF set when 2 new blocks received in BL and BP registers
register. Bit DOVF is set to indicate two blocks available.
finishes within 21 ms after DOVF set to logic 1.
and BP registers.
decoded.
assumes that block synchronization has been achieved and that no other
being decoded
in the decoder buffer
10 ms
data overflow bit
RDS on INTX
BP register
BL register
Figure
DAVFLG
INTX
t
INT_RD
t
A
READ
1
Rev. 02 — 9 August 2005
10, assumes that the RDS decoder is unsynchronized initially
1
a read must be performed before D
end read intmsk
1
21.9 ms
read BL
is placed in the BP register and the new block C
B
A
B
A
1
x
1
1
1
9.98 ms
C
1
C
B
A
B
1
1
1
1
9.98 ms
(1)
(1)
D
1
C
B
D
C
1
1
1
1
1
enters decoder buffer, thus read
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
(4)
D
A
(2)
C
B
(2)
2
1
TEA5764UK
1
1
read BL
A
2
(3)
2 ms
D
C
A
D
1
1
1
2
1
is now in the BL
FM radio + RDS
1
(5)
B
A
is missed.
D
A
2
1
2
1
read BL
B
2
001aab471
B
A
A
A
2
2
2
2
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B
A
2
2
C
2