TLE6240GP

Smart 16-Channel Low-Side Switch

Control of the Device

Data Sheet

26

Rev.3.3, 2010-02-15

6.1.5.3

Control Byte No. 3 and 8

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).

Figure 18

Echo-function of SPI

6.1.5.4

Control Byte No. 4 and 9

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.

Table 7

Control Byte No. 3 and 8

MSB

Comment

HLHL

XXXX

Echo-function of SPI

Control Byte

Table 8

Control Byte No. 4 and 9

MSB

Comment

L

L

H

H

X

XXX

OR operation, and ‘full diagnosis’

Control Byte

SI

SI and SO int. connected

Echo-function of SPI, i.e. SI

directly connected to SO.

SI information will not be

accepted during this cycle.

SI

H L H L

L L L L

X X X X

X X X X

SO

H H H H

H H H H

H H H H

H H H H

CS

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

SO

CS