TDA7415CB STMicroelectronics, TDA7415CB Datasheet - Page 32

• Manufacturer Part Number: TDA7415CB
• Description: IC PROCESSOR CAR SGNL 6CH 64LQFP
• Manufacturer: STMicroelectronics
• Type: Car Signal Processorr

Specifications of TDA7415CB

• Applications: DVD
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Digital interface
6
6.1
32/50
Digital interface
The TDA7415CB digital interface supports two different protocols: SPI and I
I
voltage at the SEL-pin falls below 5.5V, the interface switches to SPI-mode. Consequently,
the interface is able to work with a microprocessor either supplied by a 3.3V or a 5V power
supply. The SPI-mode has to be set and remain static before the device leaves the reset
state caused by power-on reset (POR).
For details of both protocols refer to the programming section.
Interface in SPI -mode
●
The SPI interface protocol comprises:
A sequence of n data bytes (Dy); each consisting of 8 bits.
A negative going edge at SEL enables the interface receiving data. The interface accepts
both a positive (Cpol=1, Cpha=1; SPI-mode 0) as well as a negative (Cpol=0, Cpha=0; SPI-
mode 3) clocking scheme. However, the data transmitted has to be valid on the rising
edges of the serial clock SCL.
Figure 24. Switching characteristics (SPI-mode):
Figure 25. Interface in SPI -mode diagram
2
C-mode the SEL-pin has to be tied to the system supply by means of a 68k -resistor. If the
Interface protocol
–
A sub-address (SAx) and
SEL
SCL
SDA
Tscl
Doc ID 14100 Rev 3
Tsu
SAx,Dy
Thld
Twh
Twl
Trel
Tsh
AC00507
2
C. To select the
TDA7415CB