Data Sheet

25

Rev.3.3, 2010-02-15

TLE6240GP

Smart 16-Channel Low-Side Switch

Control of the Device

6.1.5.2

Control Byte No. 2 and 7

If the TLE6240GP is used as bare die in a hybrid application, it is necessary to know if proper connections exist

between the

µC-port and parallel inputs. By entering ‘HHLL’ as the control word, the first eight bits of the SO give

the state of the parallel inputs, depending on the

µC signals. By comparing the IN-bits with the corresponding

µC-port signal, the necessary connection between the µC and the TLE6240GP can be verified - i.e. ‘read back of

the inputs’.

The second 8-bits fed out at the serial output contains ‘1-bit’ fault information of the outputs (H = no fault, L = fault).

In the expression given below for the output byte, ‘FX’ is the fault bit for channel X.

Figure 17

Example for two Consecutive Chip Select Cycles

Table 5

Control Byte No. 2 and 7

MSB

Comment

H

H

L

L

X

XXX

Reading back of the eight inputs and ‘1-bit

Diagnosis’ provided

Control Byte

Table 6

Serial Output

MSB

LSB

IN12

IN11

IN10

IN9

IN4

IN3

IN2

IN1

FX

FX

FX

FX

FX

FX

FX

FX

Parallel Input Signals

Fault Bits Channel 1 to 8 or 9 to 16

SI

H H L 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; reading back of

the 8 inputs and 1bit diagnosis for channels 1 to 8

SO diagnosis: No fault, normal function of channels 1 to 8 or 9 to

16 depending on previous SI command

SI

H H L L

H H H H

X X X X

X X X X

SO

CS

SI command: No change of the output states; reading back of

the 8 inputs and 1bit diagnosis for channels 9 to 16 provided

during next chip select cycle

SO diagnosis: State of eight parallel inputs and 1 bit diagnosis

performed for channels 1 to 8

State of 8 par. inputs 1bit diagnosis Ch.1..8