HAL1820, HAL24xy, HAL28xy, HAL36xy, HAL38xy
APPLICATION NOTE
Application Board HAL-APB V1.x
50
Oct. 8, 2012; APN000055_003EN
Micronas
12. HAL 3625, HAL 3675, HAL 385x and
HAL 387x
The HAL 36x5, HAL 385x and HAL 387x are members of a new generation of Hall-
effect sensors with vertical hall plate technology. With the new vertical Hall technology
it is possible to directly measure rotation angles in a range of 0° to 360° and linear
movements with simple magnetic circuits.Details on features and specification are
described in the data sheet.
12.1.
Programming interface
The sensor can be programmed via supply voltage modulation or via output voltage
modulation. The default mode is the programming via the output voltage modulation.
The sensor answers with a modulation of the output voltage.
A logical “0“ is coded as no level change within the bit time. A logical “1“ is coded as a
level change of typically 50% of the bit time. After each bit, a level change occurs (see
The serial telegram is used to transmit the EEPROM content, error codes and digital
values of the magnetic field from and to the sensor.
Fig. 12–1:
Definition of logical 0 and 1 bit
logical 0
or
t
bbit
t
bbit
logical 1
or
t
bbit
t
bbit
t
bhb
t
bhb
t
bhb
t
bhb
