TDA7333013TR STMicroelectronics, TDA7333013TR Datasheet - Page 23

• Manufacturer Part Number: TDA7333013TR
• Description: IC PROCESSOR RDS/RBDS 16-TSSOP
• Manufacturer: STMicroelectronics
• Type: RDS/RBDS Signal Processorr

Specifications of TDA7333013TR

• Applications: Radio
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

TDA7333
4
Application notes
A typical rds data transfer could work like this:
1.
2.
3.
4.
The above example is working by polling the rds_int[0] bit. An easier and better application
is possible by checking the RDS interrupt pin INTN (see below) and starting the transfer only
when this interrupt is present.
The output pin INTN acts as an interrupt pin. The source of interrupt is programmable
through the register rds_int (see
the bit rds_int[0] (i.e this interrupt pin is active low). With the help of this pin an interrupt
driven request of the rds data is possible (the external processor only starts the transfer if an
interrupt is active).
The micro sets the interrupt source to “RDS block” interrupt by setting itsrc[2:0] to 001.
The micro continuously checks the rds_int[7:0] bits for the first interrupt (rds_int[0] goes
high). If there is no interrupt it stops the transfer after these 8 bits. No update of the
rds_int[7:0] is performed.
Once there is an interrupt detected the micro will also clock out all the other RDS bits
(rds_qu[7:0], rds_corrp[7:0], rds_bd_h[7:0], rds_bd_l[7:0]).
The next interrupt can not be expected before 22ms.
Section
3.7.1), the value on the pin is the inverted value of
Application notes
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