tda7333 STMicroelectronics, tda7333 Datasheet - Page 16

• Manufacturer Part Number: tda7333
• Description: Rds/rbds Processor
• Manufacturer: STMicroelectronics

TDA7333
8.2 Read transfer
Figure 13. I
Eight bytes can be read at a time (please refer to the to the pages ??? to ??? for the meaning of each bit).
The master has always the possibility to read less than eight registers by not sending the acknowledge bit
and then generating a stop condition after having read the needed amount of registers.
There are two typical read access :
The registers are read in the following order : rds_int, rds_qu, rds_corrp, rds_bd_h,rds_bd_l, rds_bd_ctrl,
sinc4reg, testreg.
Figure 14. I
Figure 15. I
16/21
CSN
SDA
SCL
SA
CONDITION
– read only the first register rds_int to check the interrupt bit.
– read the first five registers rds_int, rds_qu, rds_corrp, rds_bd_h, rds_bd_l to get the RDS data
0
1
START
S
S
S lave addre ss
SLAVE ADDRESS
2
2
2
from master to slave
from slave to master
C read transfer
C read access example 1: read of 5 bytes
C read access example 2: read of 1 byte
R ACK
CSN
SDA
SCL
SA
CONDITION
0
1
START
S
rds_int[7:0]
R
SLAVE ADDRESS
A
ACK
rds_int
rds_qu[7:0]
R
ACK
Slave address = 001000S ( where S is the level of the pin
S = start condition
R = read mode
A = acknowledge bit
P = stop condition
A
ACK
rd s_qu
rds_corrp[7:0]
rds_int[7:0]
ACK
A
rds_bd_h[7:0]
ACK
SA_DATAOUT)
testreg
CONDITION
STOP
ACK
P
A
rds_bd_l[7:0]
P
ACK
CONDITION
STOP
P