TLE8108EM Datasheet, PDF (24/30 Pages) Infineon Technologies AG – Smart 8-Channel Low Side Relay Driver with SPI Interface

TLE 8108 EM
Smart 8-Channel Low Side Switch
Serial Peripheral Interface (SPI)
8.3
SPI Protocol
The SPI protocol of the TLE8108EM provides two registers. The input register and the diagnosis register. The
diagnosis register contains 8 pairs of diagnosis flags, the input register contains the input multiplexer configuration.
After power-on reset, all input register bits are set to 1 which is the OFF state.
SI
15 14
IN8
13 12
IN7
11 10
IN6
Default: FFFF_H
9
8
7
6
IN5
IN4
5
4
IN3
3
2
IN2
1
0
IN1
Field
INn
(n = 8-1)
Bits
15:14,
13:12,
11:10,
9:8,
7:6,
5:4,
3:2,
1:0
Type
W
Description
Input Register Channel n
00_B Clear Mode:
Channel switched off.
Diagnosis flags are cleared.
Diagnosis currents are disabled.
01_B Input Mode:
Channel is switched according to signal at input pin.
Diagnosis currents are enabled in OFF state.
10_B ON mode:
Channel is switched on.
Diagnosis currents are disabled.
11_B OFF mode (default state):
Channel is switched off.
Diagnosis currents are enabled.
If all channels are in Clear Mode, the device enters the Standby Mode a power down status with minimum current
consumption.
SO
Reset Value: FFFF_H
16¹⁾ 15 14 13 12 11 10
9
8
7
6
5
4
3
2
1
0
TER
OUT8 OUT8 OUT7 OUT7 OUT6 OUT6 OUT5 OUT5 OUT4 OUT4 OUT3 OUT3 OUT2 OUT2 OUT1 OUT1
_DIA2 _DIA1 _DIA2 _DIA1 _DIA2 _DIA1 _DIA2 _DIA1 _DIA2 _DIA1 _DIA2 _DIA1 _DIA2 _DIA1 _DIA2 _DIA1
1) This bit is valid between CS HI-LO and first SCLK LO-HI transition.
OUTn_DIA2
1
1
0
0
OUTn_DIA1
1
0
1
0
Description
Power stage ok
Short circuit to battery (SCB) or diagnostic overtemperature (DOT)
Open load (OL)
Short circuit to GND (SCG)
Data Sheet
24
Rev. 1.0, 2011-03-23