参数资料
型号: TEA5766UK/N1,023
厂商: NXP SEMICONDUCTORS
元件分类: 接收器
英文描述: FM, AUDIO SINGLE CHIP RECEIVER, PBGA25
封装: 3.30 X 3.25 MM, 0.60 MM HEIGHT, WLCSP-25
文件页数: 14/59页
文件大小: 273K
代理商: TEA5766UK/N1,023
TEA5766UK_1
NXP B.V. 2007. All rights reserved.
Product data sheet
Rev. 01 — 22 March 2007
21 of 59
NXP Semiconductors
TEA5766UK
Stereo FM radio + RDS
9.
RDS data processing
The RDS demodulator and decoder perform the following operations:
Demodulation of the RDS/RBDS data stream from the MPX signal
Symbol decoding
Obtain 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 ag when synchronization is lost
The RDS decoder can be set in different modes, each meant to look for specic
information. The modes DAV-A, DAV-B and DAV-C are described in the next paragraphs.
9.1 DAV-A processing mode
The DAV-A processing mode is the standard processing mode. In this mode each time
when a data block has been decoded it is transferred to the bus registers. It generates
interrupts on the INTX line after every new block of RDS data that has been processed
and also the DAVFLG is set. This is shown in Figure 9. The DAVFLG is reset by a read of
the bus registers.
(1) Flag is set immediately after the reset, because event is still present.
(2) When ag is set next interrupts are blocked until read or write INTMSK.
(3) When ag A is set, the interrupt is not extended beyond 10 ms.
(4) Read INTMSK clears ag, INTMSK and INTX.
(5) Write INTMSK enables INTX.
Fig 8.
Interrupt line behavior
001aaf446
flag B(1)
INTX
read INTMSK(4)
10 ms
< 10 ms
read clears INTX
(3)
write INTMSK(5)
flag A(1)
(2)
VCC
interrupt event
10 ms
< 10 ms
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