TLE75602-ESH datasheet(58/82 Pages) INFINEON

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Datasheet

58

Rev. 1.0

2017-11-23

TLE75602-ESH

SPIDER+ 12V

Serial Peripheral Interface (SPI)

CSN “low” to "high" Transition

• Command decoding is only done, when after the falling edge of CSN exactly a multiple (1, 2, 3, …) of eight

SCLK signals have been detected after the first 16 SCLK pulses. In case of faulty transmission, the

transmission error bit (TER) is set and the command is ignored.

• Data from shift register is transferred into the addressed register.

SCLK - Serial Clock

This input pin clocks the internal shift register. The serial input (SI) transfers data into the shift register on the

falling edge of SCLK while the serial output (SO) shifts diagnostic information out on the rising edge of the

serial clock. It is essential that the SCLK pin is in “low” state whenever chip select CSN makes any transition,

otherwise the command may be not accepted.

SI - Serial Input

Serial input data bits are shift-in at this pin, the most significant bit first. SI information is read on the falling

edge of SCLK. The input data consists of two parts, control bits followed by data bits. Please refer to

Chapter 10.5 for further information.

SO Serial Output

Data is shifted out serially at this pin, the most significant bit first. SO is in high impedance state until the CSN

pin goes to “low” state. New data appears at the SO pin following the rising edge of SCLK.

Please refer to Chapter 10.5 for further information.

10.2

Daisy Chain Capability

The SPI of TLE75602-ESH provides daisy chain capability. In this configuration several devices are activated by

the same CSN signal MCSN. The SI line of one device is connected with the SO line of another device (see

Figure 33), in order to build a chain. The end of the chain is connected to the output and input of the master

device, MO and MI respectively. The master device provides the master clock MCLK which is connected to the

SCLK line of each device in the chain.

Figure 33 Daisy Chain Configuration

In the SPI block of each device, there is one shift register where each bit from SI line is shifted in each SCLK.

The bit shifted out occurs at the SO pin. After sixteen SCLK cycles, the data transfer for one device is finished.

SI

device 1

SPI

SO

SI

device 2

SPI

SO

SI

device 3

SPI

SO

MO

MI

MCSN

MCLK

SPI_DaisyChain_1.emf

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