Data Sheet TLE 6220 GP

V2.1

Page

2007-05-03

9

SI

H H L L X X X X

SO H H H H H H H H

CS

CS

SI

H H H H L H H L

SO

IN4 IN3 IN2 IN1 F4 F3 F2 F1

SI command: No change of the

output state; reading back of

inputs and 1bit diagnosis

SO diagnosis: No fault, normal

function

CS

SI

H H H H L L L L

SO

H H H H H H H H

SI command: AND-Operation;

Ch1 and 4 OFF, Ch2 and 3 ON.

SO diagnosis: State of four parallel

inputs and 1 bit diagnosis performed

SI command: AND-Operation and

all channels OFF.

SO diagnosis: No fault, normal

function

3. HLHL XXXX

- Echo-function of SPI

To check the proper function of the serial interface the TLE 6220 GP provides a "SPI Echo

Function". By entering HLHL as control word, SI and SO are connected during the next

riod. 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

SI

H L H L X X X X

SO H H H H L H H H

CS

CS

SI

SO

SI command: No change of the

output states; Echo function of SPI

SO diagnosis: Open load condition

at channel 2, other channels ok.

SI word

Echo-function of SPI, i.e. SI

directly connected to SO.

SI information will be accepted

during this cycle and the

outputs set accordingly after

chip select rising edge

4. LLHH DDDD

- OR operation, and ‘full diagnosis’

With LLHH as the control word, each of the input signals IN1...IN4 are 'OR'ed with the corre-

sponding data bits (DDDD).

≥ 1

Output

Driver

IN 1...4

Serial Input,

data bits 0...3

This OR operation enables the serial interface to switch the channel ON, even though the cor-

responding parallel input might be in the off state.

⇒ SPI Priority for ON-State

Also parallel control of the outputs is possible without an SPI input.

The OR-function is the default Boolean operation if the device restarts after a Reset, or when

the supply voltage is switched on for the first time.