TLE8110EE_13 Datasheet, PDF (52/74 Pages) Infineon Technologies AG – Overvoltage, Overtemperature, ESD -Protection

TLE 8110 EE
Smart Multichannel Switch
Control of the device
12.2.4 safeCOMMUNICATION
The device contains some safety features, which are improving the protection 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 can be read out 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 CMD_RSDS - Feedback
(seeChapter 12.3.1.2).
12.3
Register and Command - Overview
This Chapter describes the Registers and Commands. The commands allow to carry through some actions, such
as reading out or clearing the diagnosis or reading out the Input Pins.
Specially highlighted here should be the encoded CMD_DMSx/OPSx commands - compactCONTROL -, a highly
efficient command-set to set a part of the output pins and read out the diagnosis at the same time. Included in this
command set is the possibility to check, if the communication works well as also the possibility to read-out some
of the parallel Input Pins INx. Using this compact command set can reduce the workload of the micro-controller
during run-time significantly.
CMD_RSD is preformed and short diagnostics [SD] is returned after each Write Cycle to any of the writable
registers.
After start-up of the device, the registers are loaded with the default settings as described below in the register
descriptions. The Registers are cleared and set back to the default values, when a low signal is applied to the pin
RST or an under-voltage condition appears at the supply pin V_CC what causes an under-voltage reset. If a low
signal at pin EN is applied or an under-voltage condition appears at pin V_DD, the Registers are not cleared.
Data Sheet
52
Rev. 1.4, 2013-07-02