E-TDA7409D STMicroelectronics, E-TDA7409D Datasheet - Page 15

• Manufacturer Part Number: E-TDA7409D
• Description: IC PROCESSOR CAR SIGNAL 20SOIC
• Manufacturer: STMicroelectronics
• Type: Car Signal Processorr

Specifications of E-TDA7409D

• Applications: Automotive Systems
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

2.0 I
2.1 Interface Protocol
The interface protocol comprises:
S = Start
R/W ="0" -> Receive-Mode (Chip could be programmed by P)
ACK = Acknowledge
P = Stop
2.2 TRANSMITTED DATA (send mode)
SM = Soft mute activated
X = Not Used
The transmitted data is automatic updated after each ACK. Transmission can be repeated without new chipaddress.
2.3 Reset Condition
A Power-On-Reset is invoked if the Supply-Voltage is below than 3.5V. After that the following data is written
automatically into the registers of all subaddresses :
The programming after POR is marked bold-face / underlined in the programming tables.
With this programming all the outputs are muted to V
Note : All the blank bits in the following tables are "don't care"-bits.
S
a start condition (S)
a chip address byte (the LSB bit determines read / write transmission)
a subaddress byte
a sequence of data (N-bytes + acknowledge)
a stop condition (P)
the max. CLOCK SPEED is 500kbits/s
MSB
1
2
"1" -> Transmission-Mode (Data could be received by P)
MSB
MSB
C BUS INTERFACE
X
1
0
D99AU1044
CHIP ADDRESS
0
0
1
0
X
1
0
LSB
R/W
X
1
ACK
MSB
I 3
I 2 I 1
SUBADDRESS
X
1
I 0
REF
A 3 A 2 A 1 A 0
(V
OUT
X
1
LSB
= V
DD
ACK
/2).
MSB
X
1
DATA 1 to DATA n
ACK
X
1
LSB
TDA7409
LSB
LSB
ACK
SM
0
15/25
P