TEA5764UK/N2,027 NXP Semiconductors, TEA5764UK/N2,027 Datasheet - Page 24

• 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
10. RDS data processing
TEA5764UK_2
Product data sheet
9.1.4.8 Band limit flag
9.2 Interrupt output
The band limit bit BLFLAG is set to logic 1 when the automatic tuning has detected the
end of the tuning band or when the PLL cannot lock on a certain frequency. This bit is
described in
The interrupt line driver is a MOS transistor with a nominal sink current of 680 A, it is
pulled HIGH by an 18 k resistor connected to pin VREFDIG. The interrupt line can be
connected to one other similar device with an interrupt output and an 18 k pull-up
resistor providing a wired OR function. This allows any of the drivers to pull the line LOW
by sinking the current. When a flag is set and not masked it generates an interrupt; see
Figure
The RDS demodulator and decoder perform the following operations:
The RDS decoder can be set to different modes, each meant to look for specific
information.
Fig 8. Interrupt line behavior
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•
•
•
•
•
•
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Demodulation of the RDS/RDBS data stream from the MPX signal
Symbol decoding
Block and group synchronization
Error detection and correction
Store last and previous data block received with associated ID and error status
Set the DAVFLG when new data is received
Set the SYNC status bit according to the current synchronization state
Set the LSYNCFL flag when synchronization is lost
V
flag
INTX
read INTMSK
write INTMSK
(1) Flag is set immediately after the reset, because event is still there.
CCA
8.
Read INTMSK clears flag, INTMSK and INTX.
Write INTMSK enables INTX.
When flag is set, the next interrupts are blocked until read / write INTMSK.
Table 4
and
Rev. 02 — 9 August 2005
10 ms
Table
5. This bit is cleared by reading byte1R.
read clears INTX
10 ms
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
10 ms
TEA5764UK
FM radio + RDS
(1)
001aab470
10 ms
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