TLE7231GXT Infineon Technologies, TLE7231GXT Datasheet - Page 22
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TLE7231GXT
Manufacturer Part Number
TLE7231GXT
Description
Manufacturer
Infineon Technologies
Datasheet
1.TLE7231GXT.pdf
(30 pages)
Specifications of TLE7231GXT
Switch Type
Low Side
Power Switch Family
TLE7231G
Input Voltage
-0.3 to 5.5V
Power Switch On Resistance
1Ohm
Output Current
320mA
Number Of Outputs
4
Mounting
Surface Mount
Supply Current
5mA
Package Type
DSO
Operating Temperature (min)
-40C
Operating Temperature (max)
150C
Operating Temperature Classification
Automotive
Pin Count
24
Lead Free Status / RoHS Status
Compliant
Figure 11
In the SPI block of each device, there is one shift register where one bit from SI line is shifted in each SCLK. The
bit shifted out can be seen at SO. After 8 SCLK cycles, the data transfer for one device has been finished. In single
chip configuration, the CS line must transit from low to high to make the device accept the transferred data. In
daisy chain configuration the data shifted out at device #1 has been shifted in to device #2. When using three
devices in daisy chain, three times 8 bits have to be shifted through the devices. After that, the MCS line must
transit from low to high (see
Figure 12
9.3
The SPI protocol of the TLE7231G 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 cleared to 0.
SI
Datasheet
MCLK
MCS
MCLK
time
MO
MCS
MI
MO
7
MI
SO device 3
SI device 3
IN3
Daisy Chain Configuration
Data Transfer in Daisy Chain Configuration
SPI Protocol
SI
6
device 1
SPI
Figure
5
12).
SO
IN2
SO device 2
SI device 2
SI
4
device 2
SPI
22
3
SPI Driver for Enhanced Relay Control
SO
IN1
SO device 1
SI device 1
SI
2
Serial Peripheral Interface (SPI)
device 3
SPI
SPIDER - TLE7231G
SPI_DasyChain.emf
1
Rev. 1.0, 2008-02-28
SPI_DasyChain2.emf
SO
IN0
0