TLE6240GP_10 Datasheet, PDF (26/37 Pages) Infineon Technologies AG – Smart 16-Channel Low-Side Switch

TLE6240GP
Smart 16-Channel Low-Side Switch
Control of the Device
6.1.5.3 Control Byte No. 3 and 8
Table 7
MSB
Control Byte No. 3 and 8
H
L
H
L
X
X
X
Control Byte
Comment
X Echo-function of SPI
To check the proper function of the serial interface the TLE6240GP provides a “SPI Echo Function”. By entering
HLHL as control word, SI and SO are connected during the next CS period. By comparing the bits clocked in with
the serial output bits, the proper function of the SPI interface can be verified. This internal loop is only closed
once (for one CS period). The “Echo Function” does not cause any internal processing of data and after the next
CS signal the SO data is ‘0’ (all registers reset).
CS
SI
HLHL LLLL XXXX XXXX
SO H H H H H H H H H H H H H H H H
SI command: No change of the output states; Echo function of
SPI
SO diagnosis: No fault, normal function of channels 1 to 8 or 9 to
16 depending on previous SI command
CS
SI SI and SO int. connected ^SO
Echo-function of SPI, i.e. SI
directly connected to SO.
SI information will not be
accepted during this cycle.
Figure 18 Echo-function of SPI
6.1.5.4 Control Byte No. 4 and 9
Table 8
MSB
Control Byte No. 4 and 9
L
L
H
H
X
X
X
Control Byte
Comment
X OR operation, and ‘full diagnosis’
With LLHH LLLL as the control word, each of the input signals IN1 to IN4 are ‘OR’ed with the corresponding SI
data bits.
With LLHH HHHH as the control word, each of the input signals IN9 to IN12 are ‘OR’ed with the corresponding SI
data bits.
Data Sheet
26
Rev.3.3, 2010-02-15