TLE8110EE Datasheet, PDF (49/72 Pages) Infineon Technologies AG – Smart Multichannel Low Side Switch with Parallel Control and SPI Interface

FLEX
Smart Multi-Channel Switch
Control of the device
Protocol Change from 2x8-bit to 16-bit
S_CS
S_SI
Upper Lower
Byte
Byte
CMD
S_SO
Upper Lower
TOR _Byte
Byte
Upper
TOR _Byte
0
Protocol Change from 16-bit to 2x8-bit
S_CS
CMD
TOR
Data
S_SI
NOP
Upper Lower
Byte
Byte
S_SO
TOR
Data
TOR ⁰
Lower
Byte
Critical Protocol Change from 16-bit to 2x8-bit
S_CS
Upper Lower
Byte
Byte
Upper Lower
TOR _Byte
Byte
S_SI
S_SO
TOR
CMD
Data
Figure 28 16-bit protocol
2x8-bit protocol is
dominant
Upper Lower
Byte
Byte
TOR ^Data...
collission
Lower
Byte
Upper Lower
Byte
Byte
Upper Lower
TOR _Byte
Byte
SPI_Protocol_16_2x8bit_mixed.vsd
12.2.4 safeCOMMUNICATION
The devise contains some safety features, which are improving the protecting of the application against mal-
function in case of disturbance of the communication between the Micro Controller and the Device:
12.2.4.1 Encoding of the commands
The Commands are encoded. In case other bit-patterns, then the defined once are received, the commands are
ignored and the communication error is indicated in the TOR-Bit (see Chapter 12.2.4.3) and can be read out in
detail with the command CMD_RSDS (seeChapter 12.3.1.2).
12.2.4.2 Modulo-8 Counter
The modulo is the integral remainder in integral division. In data communications, a modulo based approach is
used to ensure that user information in SPI protocols is in the correct order. The device has a receiver-side
counter, and a defined counter size. The modulo counter specifies the number of subsequent numbers available.
In case of TLE8110EE Modulo 8 counter specifies 8 serial numbers. The modulo 8 counter ensures that data is
taken only, when a multiple of 8 bit has been transferred. If in one transfer cycle not a multiple of 8 bits have been
counted, the data frame is ignored and a Communication Error is indicated in the TOR-Bit (see Chapter 12.2.4.3)
and in the CMD_RSDS - Feedback (seeChapter 12.3.1.2).
Data Sheet
49
Rev. 1.0, 2009-06-15