HAL855 datasheet(77/102 Pages) MICRONAS

77 / 102 page

APPLICATION NOTE

HAL8xy, HAL100x

Programmer Board

Micronas

Sept. 19, 2013; APN000046_03EN

6.5.

The Programming Procedure

The general programming procedure is described in detail for the HAL855.

An example for a programming procedure is given in Fig. 6–6.

First, the programmer board has to be initialized. If more than one sensor is connected

to the same supply line, the sensors have to be addressed sequentially. This is done by

the multiprogramming loop: After deactivating all sensors, the sensor to be pro-

grammed is activated again by sending a pulse on the corresponding output line, fol-

lowed by a dummy read command.

Note: The flow chart given in Fig. 6–6 is intended as a simple example. The multipro-

gramming loop can also be done within the calibration procedure.

Example:

Fig. 6–6:

General procedure

BEGIN

INITIALIZE BOARD

STX j 2 ETX

[Set Board Mode]

STX z CHR$(85) ETX

[Set Protocol Bittime]

STX n ETX

[Switch Vdd on]

DELAY 20 ms

MULTIPROGRAMMING

FOR SENSOR = 1 TO 4:

STX w 3 1 f 0 0 8 0 f 0 ETX

[Deactivate Sensors]

DELAY 100 ms

STX h SENSOR CHR$(25) ETX

[Select SENSOR]

STX q 0 1 1 1 ETX

[Dummy Read]

CALIBRATE SENSOR

END MULTIPROGRAMMING LOOP

END

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