TLE8110ED datasheet(47/74 Pages) INFINEON

47 / 74 page

Data Sheet

Rev. 1.0

2018-03-07

TLE8110ED

Smart Multichannel Low Side Switch with Parallel Control and SPI Interface

Control of the device

12.2.3.4 Daisy-Chain and 2x8-bit protocol

when using the TLE8110ED in a daisy-chain connection with other devices (TLE8110ED and non) special care

has to be taken to avoid interference of 2x8-bit protocol with normal communication. Few simplifed rules

must be followed for a safe SPI communication in daisy-chain environment:

1. All TLE8110ED devices have to be routed at the beginning of the chain, other devices than TLE8110ED

afterward.

2. compactCONTROL commands (2x8-bit protocol) must not be addressed to TLE8110ED.

3. The SPI frame of the daisy-chain must be extended of additional 8-bit (all zeros 00H) at befinning of the

frame.

4. When a Read/Clear Diagnosis Register A command(DRA, DRACL) is addressed to TLE8110ED, a NOP

command must be sent to the next TLE8110ED on the chain.

5. When a Read/Clear Diagonosis Register A command (DRA, DRACL) is addressed to TLE8110ED, response of

the next device on the chain must be ignored in the next SPI cycle.

Details in Figure 30 and Figure 31.

Figure 30

Daisy-Chain and 2x8-bit protocol

from dev.n

from dev.1

to dev.n

to dev.1

S_CS

S_SI

S_SO

SPI daisy-chain word

first 8-bit that could interfere with

compacCONTROL of device 1

lower-byte from dev.n affected by the

reaction of dev.1 to compactCONTROL

from dev.n

from dev.1

to dev.n

to dev.1

S_CS

S_SI

S_SO

SPI daisy-chain word

00H

all zeros 8-bit extension

last 8-bit to be ignored

Safe Communication with first all zeros 8-bit extension

Critical Communication with first 8-bit interpreted as compactCONTROL (2x8-bit protocol )

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