TLE8110EE_13 Datasheet, PDF (41/74 Pages) Infineon Technologies AG – Overvoltage, Overtemperature, ESD -Protection

TLE 8110 EE
Smart Multichannel Switch
16 bit SPI Interface
11
16 bit SPI Interface
11.1
Description 16 bit SPI Interface
The diagnosis and control interface is based on a serial peripheral interface (SPI).
The SPI is a full duplex synchronous serial slave interface, which uses four lines: S_SO, S_SI, S_CLK and S_CS.
Data is transferred by the lines S_SI and S_SO at the data rate given by S_CLK. The falling edge of S_CS
indicates the beginning of a data access. Data is sampled in on line S_SI at the falling edge of S_CLK and shifted
out on line SO at the rising edge of SCLK. Each access must be terminated by a rising edge of S_CS. A 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. The interface provides daisy chain capability.
S_SO
S_SI
S_CS
S_CLK
time
MSB 14 13 12 11 10 9 8
7
6
5
4
3
2
1
LSB
MSB 14 13 12 11 10 9 8
7
6
5
4
3
2
1 LSB
SPI.vsd
Figure 25 16 bit SPI Interface
The SPI protocol is described in Chapter “Control of the device”. Concerning Reset of the SPI, please refer to the
chapter “Reset”
11.2
Timing Diagrams
S_ CS
t
CS lead
S_CLK
S_SI
t_{SO (en )}
S_SO
Figure 26 SPI timing diagram
t _SCLKp
t _SCLKh t _SCLKl
t _SIsu
t _SIh
t _SOv
t
CSlag
t
CStd
t _SOdis
0.7Vdd
0.2V_dd
0.7V_dd
0.2V_dd
0.7V_dd
0.2Vdd
0.7V_dd
0.2V_dd
Data Sheet
41
Rev. 1.4, 2013-07-02