HAL 283x
DATA SHEET
6. Programming of the Sensor
HAL 283x features two different customer modes. In
Application Mode the sensor provides a continuous
SENT data stream. In Programming Mode it is possi-
ble to change the register settings of the sensor.
After power-up the sensor is always operating in the
Application Mode. It is switched to the Programming
Mode by a defined sequence on the sensor output pin.
6.1. Programming Interface
In Programming Mode the sensor is addressed by
modulating a serial telegram (BiPhase-M) with con-
stant bit time on the output pin. The sensor answers
with a modulation of the output voltage.
A logical “0” of the serial telegram 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 Table 6–1).
The serial telegram is used to transmit the EEPROM
content, error codes and digital values of the magnetic
field or temperature from and to the sensor.
Table 6–1: Biphase-M frame characteristics of the host
tbbit
tbbit
or
logical 0
tbbit
tbbit
or
logical 1
tbhb tbhb
tbhb tbhb
Fig. 6–1: Definition of logical 0 and 1 bit
A description of the communication protocol and the
programming of the sensor is available in a separate
document (Application Note Programming HAL 283x).
Symbol
tbbit (host)
tbhb (host)
tbifsp (host)
Vrxth_lh
Vrxth_hl
VSUPPRG
Parameter
Min.
Biphase Bit Time
970
Biphase Half Bit Time 0.45
Biphase Interframe
3
Space
Receiver low to high 1.2
threshold voltage
Receiver high to low 1.1
threshold voltage
Supply Voltage During 5.6
Programming
Typ.
1024
0.5
Max.
1075
0.55
1.5
1.4
6.5
Unit
µs
tbbit (host)
tbbit (host)
Remark
V
V
V
Table 6–2: Biphase-M frame characteristics of the sensor
Symbol
tbbit (sensor)
tbhb (sensor)
tbresp
Parameter
Biphase Bit Time
Biphase Half Bit Time
Biphase Response
Time
Slew Rate
Min.
820
1
Typ.
1024
0.5
2
Max.
1225
5
Unit
µs
tbbit (sensor)
tbbit (sensor)
Remark
V/µs
30
Jan. 18, 2016; DSH000165_002EN
Micronas