TLE7240SL Datasheet, PDF (21/28 Pages) Infineon Technologies AG – 8 Channel Protected Low-Side Relay Switch

SPI Driver for Enhanced Relay Control
SPIDER - TLE 7240SL
Serial Peripheral Interface (SPI)
MI
MO
MCS
MCLK
time
SO device 3
SI device 3
SO device 2
SI device 2
SO device 1
SI device 1
Figure 11 Data Transfer in Daisy Chain Configuration
SPI_DasyChain2.emf
8.3
SPI Protocol
The SPI protocol of the SPIDER - TLE 7240SL provides two registers. The input register and the diagnosis
register. The diagnosis register contains four pairs of diagnosis flags, the input register contains the input
multiplexer configuration. After power-on reset, all register bits are set to 1 and the device is in idle mode.
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 Stand-by Mode:
Fast channel switched off.
Diagnosis flags are cleared.
Diagnosis current is disabled.
01_B Input Mode:
Channel is switched according to signal at input pin.
Diagnosis current is enabled in OFF-state.
10_B ON Mode:
Channel is switched on.
11_B OFF Mode:
Channel is switched off.
Diagnosis current is enabled.
If all channels are in Standby Mode, the device is in power down status with minimum current consumption (sleep
mode).
Data Sheet
21
Rev. 1.1, 2009-04-15