tea5766uk NXP Semiconductors, tea5766uk Datasheet - Page 30

• Manufacturer Part Number: tea5766uk
• Description: Tea5766uk Stereo Fm Radio + Rds
• Manufacturer: NXP Semiconductors

Fig 13. RDS flag behavior
(1) Normally reading byte 19R would reset signal DAVN, but now it is reset after 10 ms, the maximal LOW time of signal DAVN.
(2) Read of byte 15R in DAV-A and DAV-B mode clears DAVFLG. In DAV-C mode two consecutive RDS data blocks are read and hence DAVFLG is reset after reading
(3) Read of byte 19R clears signal DAVN.
(4) Write byte 0W (interrupt register).
Blocking DAVFLG: at end of reading byte 15R or byte 17R (DAV-A, B/C) DAVFLG is forced to zero. Only after reading byte 19R DAVFLG is released again.
If synchronous reading is performed using TEA5766UK generated interrupts, this problem does not occur.
To prevent undefined situations, byte 12R to byte 19R should always be read in one action immediately after each other.
Signal DAVN
byte 17R instead of byte 15R (dotted line).
RDS data
DAVN
DAVFLG
reset of DAVFLG
Read byte:
A
INTX.
0R
15R
(2)
17R
19R 0W
B
(3)
0R
15R
17R
19R 0W
C
(4)
0R
15R
17R
19R 0W
D
0R
15R
17R
19R 0W
A
0R
15R
17R
19R 0W
10 ms
0R
15R
17R
B
19R 0W
(1)
001aab475
C