HAL855 datasheet(28/102 Pages) MICRONAS

28 / 102 page

HAL8xy, HAL100x

APPLICATION NOTE

Programmer Board

Sept. 19, 2013; APN000046_03EN

Micronas

4.3.6.

Programming Information

If the content of any register (except the lock registers) is to be changed, the desired

value must first be written into the corresponding RAM register. Before reading out the

RAM register again, the register value must be permanently stored in the EEPROM.

Permanently storing a value in the EEPROM is done by first sending an ERASE com-

mand followed by sending a PROM command. The address within the ERASE and

PROM commands is not important. ERASE and PROM act on all registers in parallel.

If all HAL805, HAL815, HAL817 and HAL1000 registers are to be changed, all writing

commands can be sent one after the other, followed by sending one ERASE and

PROM command at the end.

During all communication sequences, the customer has to check if the communication

with the sensor was successful. This means that the acknowledge and the parity bits

sent by the sensor have to be checked by the customer. If the Micronas programmer

board is used, the customer has to check the error flags sent from the programmer

board.

Note: For production and qualification tests, it is mandatory to set the Lock bit after

final adjustment and programming. The Lock function is active after the next

power-up of the sensor. Micronas also recommends sending an additional

ERASE command after sending the LOCK command (This is done automati-

cally when the board command “l” is used for locking the sensor.).

The success of the Lock process should be checked by reading at least one

sensor register after locking and/or by an analog check of the sensor’s output

signal.

Electrostatic Discharges (ESD) may disturb the programming pulses. Please

take precautions against ESD.

HAL855 Datasheet(PDF) 28 Page - Micronas