TLE8110EE_13 Datasheet, PDF (49/74 Pages) Infineon Technologies AG – Overvoltage, Overtemperature, ESD -Protection

TLE 8110 EE
Smart Multichannel Switch
Control of the device
Protocol Change from 2x8-bit to 16-bit
S_CS
S_SI
Upper Lower
Byte
Byte
S_SO
Upper Lower
Byte
Byte
Protocol Change from 16-bit to 2x8-bit
S_CS
CMD
Upper
Byte
0
CMD
Data
S_SI
NOP
Upper
Byte
Lower
Byte
S_SO
Data
0
Lower
Byte
Critical Protocol Change from 16-bit to 2x8-bit
S_CS
S_SI
S_SO
CMD
Data
2x8-bit protocol is
dominant
Upper Lower
Byte
Byte
Data...
collission
Lower
Byte
Upper
Byte
Lower
Byte
Upper
Byte
Lower
Byte
Upper
Byte
Lower
Byte
Upper
Byte
Lower
Byte
SPI_Protocol_16_2x8bit_mixed.vsd
Figure 30 16-bit protocol
12.2.3.4 Daisy-Chain and 2x8-bit protocol
When using the TLE8110EE in a daisy-chain connection with other devices (TLE8110EE and non) special care
has to be taken to avoid interference of 2x8-bit protocol with normal communication. Few simplified rules must be
followed for a safe SPI communication in daisy-chain environment:
1. All TLE8110EE devices have to be routed at the beginning of the chain, other devices than TLE8110EE
afterward
2. compactCONTROL commands (2x8-bit protocol) must not be addressed to TLE8110EE
3. The SPI frame of the daisy-chain must be extended of additional 8-bit (all zeros 00_H) at beginning of the frame
4. When a Read/Clear Diagnosis Register A command (DRA, DRACL) is addressed to TLE8110EE, a NOP
command must be sent to the next TLE8110EE on the chain
5. When a Read/Clear Diagnosis Register A command (DRA, DRACL) is addressed to TLE8110EE, response of
the next device on the chain must be ignored in the next SPI cycle
Details in Figure 31 and Figure 32.
Data Sheet
49
Rev. 1.4, 2013-07-02