Application
Note
®
HAL 8xy, HAL 100x
Programmer Board
APN000046_03EN
Edition Sept. 19, 2013
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
Copyright, Warranty,
and Limitation of
Liability
The information and data contained in this document are believed to be accurate and
reliable. The software and proprietary information contained therein may be protected
by copyright, patent, trademark and/or other intellectual property rights of Micronas. All
rights not expressly granted remain reserved by Micronas.
Micronas assumes no liability for errors and gives no warranty representation or guarantee regarding the suitability of its products for any particular purpose due to these
specifications.
By this publication, Micronas does not assume responsibility for patent infringements or
other rights of third parties which may result from its use. Commercial conditions, product availability and delivery are exclusively subject to the respective order confirmation.
Any information and data which may be provided in the document can and do vary in
different applications, and actual performance may vary over time.
All operating parameters must be validated for each customer application by customers’ technical experts. Any new issue of this document invalidates previous issues. Micronas reserves the right to review this document and to make changes to the document’s content at any time without obligation to notify any person or entity of such
revision or changes. For further advice please contact us directly.
Do not use our products in life-supporting systems, military, aviation, or aerospace
applications! Unless explicitly agreed to otherwise in writing between the parties, Micronas’ products are not designed, intended or authorized for use as components in systems intended for surgical implants into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the product could
create a situation where personal injury or death could occur.
No part of this publication may be reproduced, photocopied, stored on a retrieval system or transmitted without the express written consent of Micronas.
Micronas Trademarks
– HAL
Micronas Patents
Sensor programming with VDD-Modulation protected by Micronas Patent No. EP 0 953
848.
Third-Party Trademarks
All other brand and product names or company names may be trademarks of their
respective companies.
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HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
Contents
Page
Section
Title
5
5
6
1.
1.1.
1.2.
Introduction
Features
Supported Micronas Hall-Effect Sensors
8
8
8
8
9
9
10
10
11
2.
2.1.
2.2.
2.3.
2.4.
2.5.
2.5.1.
2.6.
2.7.
Functional Description
Software
Firmware
Power-On Self-Test
The COM Port Parameters
Connectors
Pinning of the Interface Connector
LED Description
Error Flag Codes
12
12
13
14
15
16
3.
3.1.
3.2.
3.3.
3.4.
3.4.1.
Usage of the Hall Programmer V 5.1
Tips for Safe Programming of the Sensors
Recommended Operating Conditions
Recommended Wiring
Maintenance and Calibration
Firmware Update
17
18
19
20
21
21
21
24
25
26
28
29
30
32
4.
4.1.
4.2.
4.2.1.
4.3.
4.3.1.
4.3.2.
4.3.3.
4.3.4.
4.3.5.
4.3.6.
4.4.
4.5.
4.5.1.
Operation Mode 0
Definition of the Protocol
The Board Commands BCMD
Monitoring of the Programming Voltage
Programming of the Sensor
Definition of Programming Pulses
Definition of the Telegram
Telegram Codes
Number Formats
Register Information (HAL805/HAL815/HAL817)
Programming Information
Data Formats
The Programming Procedure
The Calibration Procedure
35
36
37
38
39
39
40
40
40
43
44
46
48
50
51
53
53
55
58
59
5.
5.1.
5.2.
5.2.0.1.
5.2.0.2.
5.2.1.
5.3.
5.3.1.
5.3.2.
5.3.3.
5.3.4.
5.3.5.
5.3.6.
5.3.7.
5.4.
5.5.
5.5.1.
5.5.2.
5.5.3.
5.5.4.
Operation Mode 1
Definition of the Protocol
The Board Commands BCMD
HAL805, HAL815, HAL817, HAL810 and HAL1000
HAL82x, HAL83x, HAL880, HAL1002
Monitoring of the Programming Voltage
Programming of the Sensor
Definition of Programming Pulses
Definition of the Telegram
Telegram Codes
Number Formats
Register Information (HAL805 / HAL815 / HAL817)
Register Information (HAL82x / HAL83x / HAL880 / HAL1002)
Programming Information
Data Formats
The Programming Procedure
Programming Procedure for HAL805, HAL810, HAL815, HAL817 and HAL1000
The Calibration Procedure
Programming Procedure for HAL82x, HAL83x, HAL880 and HAL1002
The Calibration Procedure
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Contents, continued
Page
Section
Title
62
63
64
66
67
67
67
71
72
73
75
76
77
78
79
6.
6.1.
6.2.
6.2.1.
6.3.
6.3.1.
6.3.2.
6.3.3.
6.3.4.
6.3.5.
6.3.6.
6.4.
6.5.
6.5.1.
6.5.2.
Operation Mode 2
Definition of the Protocol
The Board Commands BCMD
Monitoring of the Supply Voltage
Programming of the Sensor
Definition of Programming Pulses
Definition of the Telegram
Telegram Codes
Number Formats
Register Information
Programming Information
Data Formats
The Programming Procedure
The Programmable Output Characteristic
The Calibration Procedure
83
84
85
86
87
87
87
91
92
93
94
95
96
97
98
7.
7.1.
7.2.
7.2.1.
7.3.
7.3.1.
7.3.2.
7.3.3.
7.3.4.
7.3.5.
7.3.6.
7.4.
7.5.
7.5.1.
7.5.2.
Operation Mode 3
Definition of the Protocol
The Board Commands BCMD
Monitoring of the Supply Voltage
Programming of the Sensor
Definition of Programming Pulses
Definition of the Telegram
Telegram Codes
Number Formats
Register Information
Programming Information
Data Formats
The Programming Procedure
The Programmable Output Characteristic
The Calibration Procedure
102
8.
Application Note History
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Release Note:
Revision bars indicate significant changes to the previous edition.
1. Introduction
The Hall programmer board V 5.1 is a general-purpose programming interface which is
capable of addressing the programmable Micronas Hall-effect sensor families HAL 8xy
and HAL 100x.
The Hall programmer board V 5.1 is fully software compatible to the Hall programmer
board V 4.1. Hence, it is possible to replace older boards by V 5.1 while keeping the
software programmer.
1.1.
Features
– Communication with a PC by serial interface (RS232)
– Data transfer to/from PC board at a Baud rate of up to 57600
– Supervised programming of the Hall-effect sensors
– Output voltage level control
– Up to four Hall-effect sensors can be connected in parallel
– Easy firmware upgrade possible
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1.2.
Supported Micronas Hall-Effect Sensors
The board supports all programmable Micronas Hall sensors, each having its own special requirements with respect to the programmer board.
Therefore, the board can be run in different operation modes (board modes), which are
addressed separately in subsequent sections of this application note.
Table 1–1:
6
Overview Hall sensors and operation modes
Type
Operation Mode
Reference
HAL805
0 (Emulation V 4.1)
1
Section 4
Section 5
HAL810
0 (Emulation V 4.1)
1
Section 4
Section 5
HAL815
0 (Emulation V 4.1)
1
Section 4
Section 5
HAL817
0 (Emulation V 4.1)
1
Section 4
Section 5
HAL82x
1
Section 5
HAL83x
1
Section 5
HAL855
2
Section 6
HAL856
3
Section 7
HAL880
1
Section 5
HAL1000
0 (Emulation V 4.1)
1
Section 4
Section 5
HAL1002
1
Section 5
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HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
Fig. 1–1:
Micronas
Top view of the Hall programmer board V 5.1
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APPLICATION NOTE
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2. Functional Description
The Hall programmer board V 5.1 serves as a communication interface between a PC
and the programmable Hall sensor connected to the board.
With a specific programming software, command strings are sent to the board, which
generate the serial protocol pattern for the sensor. After sending the protocol, the board
reads back the answer of the Hall sensor or in case of a communication error generates an error flag.
Depending on the command, the board can send the answer of the Hall sensor back to
the PC.
The Hall programmer board V 5.1 can be connected to a serial port of a PC (COM1,
COM2, COM3, or COM4) using a 1:1 cable with SUB-D-9 plugs.
2.1.
Software
For each of the programmable Hall sensor families, a specific PC software exists. This
software provides a graphical user interface based on Microsoft Visual Basic or LabView.
For detailed information on the software, please refer to the software documentation
enclosed in the software installation CD.
2.2.
Firmware
The firmware of the board is stored in an on-board flash memory. The current version
number of the firmware can be read out by sending a “v” command followed by a “t”
command (see Table 4–2).
If the Micronas VB software is used, the firmware version number is read out by selecting the menu item:
Help About.
It is easily possible to do a firmware update (see Section 3.4.1).
2.3.
Power-On Self-Test
Firmware version 1.27 or higher provides a power-on self-test procedure:
– After setting the supply voltage or pushing the reset button, the board performs a
self-test and measures all voltage levels.
– In case of an error, the status flag is set and the error LED ignites.
– If this happens, disconnect all sensors and try again. If the error persists, please
contact your supplier.
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2.4.
The COM Port Parameters
The basic parameters for the setup of the serial communication are described in
Table 2–1.
Table 2–1:
2.5.
COM port parameters
Parameter
Value
Remarks
Baud rate
9600
Jumper ’BaudRate’ set
57600
Jumper ’BaudRate’ open
Data bits
8
Stop bits
1
Parity
EVEN
Flow control
NONE
Connectors
Up to four sensors can be connected to the programmer board V 5.1. For this purpose,
two 6-pin connectors, HAL 1/2 and HAL 3/4, are supplied.
Note: In case of HAL 810, HAL 856 and HAL 1000 only one sensor can be connected
to the board. These sensors do not support the required multi-programming
function.
Alternatively, one Hall sensor can be inserted in the three-pin socket HAL beneath the
connector HAL 1/2. The pins of this socket are connected parallel to pins 1, 3, and 5 of
the connector HAL 1/2.
The male plug (Amp 215083) corresponding to the red connectors HAL 1/2 and HAL 3/
4 can be ordered from Bürklin with the order no. 58F462.
1
3
2
Fig. 2–1:
Micronas
5
4
6
Interface connector HAL 1/2 (HAL 3/4).
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2.5.1.
Pinning of the Interface Connector
The pinning of the interface connector is described in Table 2–2.
Table 2–2:
Pinning HAL Interface
Pin No.
Description
1
Sensor input
HAL 1/2: VDD Sensor 1
HAL 3/4: VDD Sensor 3
2
Sensor input
HAL 1/2: VDD Sensor 2
HAL 3/4: VDD Sensor 4
3, 4
Common sensor ground
5
Sensor output
HAL 1/2: VOUT Sensor 1
HAL 3/4: VOUT Sensor 3
6
Sensor output
HAL 1/2: VOUT Sensor 2
HAL 3/4: VOUT Sensor 4
2.6.
LED Description
Table 2–3:
10
LED description
LED
Description
Remarks
NORM
Normal operating voltage (VDD)
5.0 V calibrated
LOW
Low level of telegram (VDD)
5.5 V calibrated
HIGH
High level of telegram (VDD)
8.0 V calibrated
PROG
Programming voltage level
12.5 V calibrated
READY
On when board ready for operation
DATA
High level of telegram (VOUT)
PCCOM
Receive data from PC
ERROR
Error flag
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2.7.
Error Flag Codes
Each response sent from the programmer board to the PC contains a status or error
flag.
Table 2–4:
Error flag description
Error Flag
Description
0
No error; status OK
1
Unspecified system error
2
Output low-level detection failure
3
Missing acknowledge (ACK)
4
ACK time-out failure
5
Bit time < 1 ms
6
VPROG out of range
Note: For safe programming, the evaluation of the error flags is mandatory.
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3. Usage of the Hall Programmer V 5.1
3.1.
Tips for Safe Programming of the Sensors
The Hall programmer board V 5.1 generates all voltage levels according to the specification of the serial protocol.
VPROG
external generation
In case of the sensors HAL805, HAL815, HAL817, HAL810, HAL824, HAL825,
HAL830, HAL835, HAL880, HAL1000 and HAL1002 the programming voltage VPROG
(which is necessary for the permanent storing of the data in the EEPROM memory) has
to be generated externally, i.e. by the programmer board. If VPROG is out of the specification limits, the programming of the EEPROM memory may be insufficient and the
reliability of the sensor may be reduced. Hence, the Hall programmer board V 5.1 is
equipped with an on-board A/D-converter which reads back the programming voltage
VPROG. The A/D-converter is polled every 80 µs.
If VPROG drops below 12.4 V, an error flag is set and the ERROR LED on the programmer board ignites. Please ensure that your software evaluates the error flags (see
Section 2.7).
VPROG
internal generation
In case of the sensors HAL855 and HAL856, the programming voltage is generated
internally. The supply voltage of the Hall sensor during programming must be 5.0 V.
The width of both pulses (erase and prom) is defined by the programmer board. In case
a customer-specific software is implemented, please ensure that the programming time
is set to 100 ms.
We recommend supervising the programming process and verification of the results
after programming the sensors (see Table 3–1).
Note: The programming voltage VPROG is measured at the output of the Hall programmer board. However, this measurement cannot consider any voltage drop which
may occur between the Hall programmer board and the Hall sensor.
The voltage drop between the programmer board and the Hall sensor must not
exceed 50 mV.
Please ensure that the Hall sensor and the programmer board are connected
low resistively to a common ground.
Note: Electrostatic discharges (ESD) may disturb the programming pulses. Please
take precautions against ESD.
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Table 3–1:
Check list
Check Item
When
Status/error flag
After transmission of each write, read, or
store command
Programming voltage
After sending a store command
(ERASE and PROM)
Programming pulse width
Evaluation of software after implementation
Verify written data
After finishing the programming sequence
Lock function
After lock
(Note: The Lock function is active after the
next power-on reset.)
Analog test (functional test)
3.2.
After locking
Recommended Operating Conditions
Functional operation at conditions other than those listed below is not implied and may
result in insufficient programming of the connected sensor and may cause damage to
the Hall programmer board.
Symbol
Parameter
Min.
Typ.
Max.
Unit
VSUP
Supply Voltage (DC)
17.0
18.0
20.0
V
VACp-p
Supply Voltage AC Ripple
0
0.150
Vp-p
ISUP
Supply Current
50
120
300
mA
CL
Load Capacitance
20001)
nF
IOUT
Continuous Output Current
60
mA
TA
Ambient Temperature Range
10
25
50
°C
1)
Conditions
Example: If four sensors are connected to the programmer board, blocking capacitors of 500 nF between VDD
and GND of each sensor can be applied.
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3.3.
Recommended Wiring
We recommend connecting the application to the board using shielded wires.
In order to minimize the risk of electromagnetic disturbances, the cable should be as
short as possible.
Note: Especially in noisy environments beneath power switches, electromagnetic
actuators, and the like, EMI-compliant layout of the wiring is mandatory.
For recommended cable parameters, please refer to Table 3–2.
Note: The programmer board reads back the programming voltage every 80 µs in
order to be able to detect short spikes on the output voltage line. If cables other
than those specified in Table 3–2 are used, such spikes may not be detected by
the board.
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3.4.
Maintenance and Calibration
We recommend sending the programmer board back to the supplier for maintenance
and calibration of the voltage levels after one year of operation.
The Hall programmer board must not be maintained or repaired by the customer. In
case of any problems or defects, please contact your supplier.
WARNING: Do not modify any part of the Hall programmer board V 5.1, nor readjust
any trimming potentiometer. Otherwise, the board may be damaged, the
sensor programming may be insufficient, and the reliability of the sensor
reduced.
VDD
Customer Application
GND
Programmer Board V 5.1
VOUT
L
Fig. 3–1:
Table 3–2:
Recommended wiring schematic sketch
Recommended cable parameters
Symbol
Parameter
Min.
Typ.
Max.
Unit
Conditions
R0
Ohmic Resistance per Wire
1
5
I < 10 mA
C0
Capacitance
80
120
pF
Z
Impedance
50
L
Length
1
m
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3.4.1.
Firmware Update
The HAL Programmer V5.1 is equipped with a flash-memory. Thus, firmware-upgrades
can be done easily by flashing the new firmware into this memory. For this purpose the
software-tool-kit ‘FLASH IT’ is provided.
1. Unzip the package ‘Flashit.zip’ into a suitable working directory. When unzipping with
‘WinZip’ a sub-folder ‘\Flashit’ will be generated.
2. Close the jumper ‘BOOT’ beneath the ‘Reset’-button of the HAL Programmer Board.
3. Push the ‘Reset’-button.
4. Open the jumper ‘BOOT’ again.
5. Start the executable ‘Bootload.exe’ by double-clicking the icon in \Flashit.
6. After hitting the
Fig. 3–2:
icon, the flash process starts.
Flash procedure
Note: The flash process lasts for about 10 – 15 min. After the process has finished,
the board will be reset automatically and the new firmware will start working.
Note: The firmware to be loaded into the flash-memory is called ‘HALFLASH.H86’. It
must be stored in the same folder where the executable is located.
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4. Operation Mode 0
Emulation of the Programmer Board V 4.1:
HAL805, HAL815, HAL817, HAL810, and HAL1000
This operation mode is the default mode. It is invoked after power-on or pushing the
reset button. Alternatively, this operation mode can be set by sending the “j0” command.
Communication:
PC prog. board
Section 4.1 and Section 4.2 contain a detailed description of communication between
the PC and the programmer board V 5.1. In particular, all board commands available in
the operation mode “j0” are listed.
Communication:
prog. board sensor
The communication between the programmer board and the Hall sensor is described in
Section 4.3
Data formats
The data formats for communication between both the PC and the board, and the
board and the sensor are summarized in Section 4.4
Programming
procedure
Finally, Section 4.5 depicts the programming procedure and gives an example of a
complete programming sequence.
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4.1.
Definition of the Protocol
The protocol and the commands in the emulation mode are exactly the same as those
of the programmer board V 4.1.
The general syntax is as follows (blanks are given for better readability only):
PC Board:
STX BCMD [CMD CP ADR AP] [DAT3 DAT2 DAT1 DAT0 DP] ETX
Board PC:
STX STATUS DAT3 DAT2 DAT1 DAT0 DP ETX
The characters in brackets [...] are optional, depending on the board command BCOM.
Table 4–1:
18
Description of the characters
Character
Description
STX
ASCII character 2
ETX
ASCII character 3
BCMD
Board command
CMD
Command
CP
Command parity
ADR
Address
AP
Address parity
DAT3
DAT2
DAT1
DAT0
Data characters, each encoding 4 bit in HEX format.
Example:
0 1 f 0 (HEX) = 496
DP
Data parity
STATUS
Status/error flag
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4.2.
The Board Commands BCMD
The board commands activate functions of the firmware. The characters following the
BCMD are the parameters of this function. Some functions serve to control the board
operation and do not address the Hall device.
The read, write, program, and lock functions communicate with the Hall device. The
parameters of these functions are converted into a serial telegram and is sent to the
connected sensor.
Table 4–2:
Description of the board commands
BCMD
Parameters
Description
n
Switch VDD on
o
Switch VDD off
z[t]
t = 10...255 (as ASCII character)
Set bit time slow mode
bit time = t × 0.02 ms
default t = 162
HAL8x5, HAL810, HAL1000: set t = 85
default bit time = 3.24 ms
HAL8x5, HAL810, HAL1000: set bit time = 1.7 ms
t = 10...255 (as ASCII character)
Set programming pulse width
width = t × 0.50 ms
HAL8x5, HAL810, HAL1000: set t = 200
HAL8x5, HAL810, HAL1000: set width = 100 ms
t = 10...255 (as ASCII character)
Select sensor A,
select pulse width = t × 4.0 µs
recommended t = 25
recommended pulse width = 100 µs
t = 10...255 (as ASCII character)
Select sensor B,
select pulse width = t × 4.0 µs
recommended t = 25
recommended pulse width = 100 µs
e[p]
p = CMD CP ADR AP DAT3 DAT2 DAT1 DAT0 DP
Write HAL and echo data to PC
q[p]
p = CMD CP ADR AP
Read HAL and echo data to PC
m[p]
p = CMD CP ADR AP
Program HAL and echo program voltage to PC
l[p]
p = CMD1 CP1 ADR1 AP1 CMD2 CP2 ADR2 AP2
Lock HAL and echo program voltage to PC
v
Request firmware version
t
Request status and echo data to PC
j[p]
p = 0...3 (as HEX)
Switch board operation mode
0 = EMU Board V 4.1 (default)
1 = HAL805, HAL815, HAL817, HAL810,
HAL82x, HAL83x, HAL880, and HAL100x
2 = HAL855
3 = HAL856
u[t]
a[t]
b[t]
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Examples:
(Blanks are given for better readability only)
– power on:
STX n ETX
– set bit time slow CHR$(85) = ’U’:
STX z U ETX
– read register no. 2:
STX q 2 0 2 1 ETX
– write register no. 2:
STX e 3 1 2 1 0 0 0 A 1 ETX
– store sequence:
STX u CHR$(200) ETX (set programming time)
STX m 5 1 1 1 ETX (ERASE)
STX m 4 0 1 1 ETX (PROM)
– deactivate sensors:
STX e 3 1 F 0 0 8 0 F 0 ETX
– select sensor A:
STX a CHR$(25) ETX
– lock sensors
STX u CHR$(200) ETX (set programming time)
STX l 7 0 6 0 5 1 1 1 ETX (LOCK-ERASE)
4.2.1.
Monitoring of the Programming Voltage
In case of ERASE, PROM, and LOCK, the programming pulse voltage is measured by
the board, and a data string is sent back to the PC. The relation between the data and
the programming voltage is
DAT
V PROG = ------------ 6 2.485 V
4095
If the programming pulse voltage is out of the specification limits, the status bit is set to
“1”.
Examples:
– VPROG = 12.15 V, Data board PC:
STX 1 0 D 0 A 0 ETX
(DAT = 0 D 0 A)
– VPROG = 12.50 V, Data board PC:
STX 0 0 D 6 9 0 ETX
(DAT = 0 D 6 9)
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4.3.
4.3.1.
Programming of the Sensor
Definition of Programming Pulses
The sensor is addressed by modulating a serial telegram on the supply voltage. The
sensor answers with a serial telegram on the output pin.
The bits in the serial telegram have a different bit time for the VDD-line and the output.
The bit time for the VDD-line is defined through the length of the Sync bit at the beginning of each telegram. The bit time for the output is defined through the Acknowledge
bit.
A logical “0” is coded as no voltage change within the bit time. A logical “1” is coded as
a voltage change between 50% and 80% of the bit time. After each bit, a voltage
change occurs.
4.3.2.
Definition of the Telegram
Each telegram starts with the Sync bit (logical 0), 3 bits for the Command (COM), the
Command Parity bit (CP), 4 bits for the Address (ADR), and the Address Parity bit (AP).
There are 4 kinds of telegrams:
Write a register
After the AP bit, follow 14 Data bits (DAT) and the Data Parity bit (DP). If the telegram is
valid and the command has been processed, the sensor answers with an Acknowledge
bit (logical 0) on the output (see Fig. 4–2).
Read a register
After evaluating this command, the sensor answers with the Acknowledge bit, 14 Data
bits, and the Data Parity bit on the output (see Fig. 4–3).
Programming the
EEPROM cells
After evaluating this command, the sensor answers with the Acknowledge bit. After the
delay time tw, the supply voltage rises up to the programming voltage (see Fig. 4–4).
Activate a sensor
If more than one sensor is connected to the supply line, selection can be done by first
deactivating all sensors. The output of all sensors will be pulled to ground by the internal 10 k resistors. With an activate pulse on the appropriate output pin, an individual
sensor can be selected. All following commands will only be accepted from the activated sensor (see Fig. 4–5).
Micronas
Sept. 19, 2013; APN000046_03EN
21
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
tr
tf
VDDH
tp0
logical 0
tp0
or
VDDL
tp1
VDDH
tp0
logical 1
tp1
VDDL
Fig. 4–1:
Table 4–3:
tp0
or
Definition of logical 0 and 1 bit
Telegram parameters
Symbol
Parameter
Pin
Min.
Typ.
Max.
Unit
VDDL
Supply voltage for low level
during programming
1
5
5.6
6
V
VDDH
Supply voltage for high level
during programming
1
6.8
8.0
8.5
V
tr
Rise time
1
0.05
ms
tf
Fall time
1
0.05
ms
tp0
Bit time on VDD
1
1.7
1.75
1.8
ms
tp0 is defined through the Sync bit
tpOUT
Bit time on output pin
3
2
3
4
ms
tpOUT is defined through the Acknowledge bit
tp1
Voltage change for logical 1
1, 3
50
65
80
%
% of tp0 or tpOUT
VDDPROG
Supply voltage for
programming the EEPROM
1
12.4
12.5
12.6
V
tPROG
Programming time for EEPROM
1
95
100
105
ms
trp
Rise time of programming voltage
1
0.2
0.5
1
ms
tfp
Fall time of programming voltage
1
0
1
ms
tw
Delay time of programming voltage
after Acknowledge
1
0.5
0.7
1
ms
Vact
Voltage for an Activate pulse
3
3
4
5
V
tact
Duration of an Activate pulse
3
0.05
0.1
0.2
ms
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Sept. 19, 2013; APN000046_03EN
Remarks
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
WRITE
Sync
COM
CP
ADR
AP
DAT
DP
VDD
Acknowledge
VOUT
Fig. 4–2:
Telegram for coding a Write command
READ
Sync
COM
CP
ADR
AP
VDD
Acknowledge
DAT
DP
VOUT
Fig. 4–3:
Telegram for coding a Read command
trp
tPROG
tfp
VDDPROG
ERASE, PROM, and LOCK
Sync
COM
CP
ADR
AP
VDD
Acknowledge
VOUT
tw
Fig. 4–4:
Telegram for coding the EEPROM programming
VACT
tr
tACT
tf
VOUT
Fig. 4–5:
Micronas
Activate pulse
Sept. 19, 2013; APN000046_03EN
23
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
4.3.3.
Telegram Codes
Sync Bit
Each telegram starts with the Sync bit. This logical “0” pulse defines the exact timing for
tp0.
Command Bits (COM)
The Command code contains 3 bits and is a binary number. Table 4–4 shows the available commands and the corresponding codes for the HAL805, HAL815, HAL817 and
HAL1000.
Command Parity Bit
(CP)
This Parity bit is “1” if the number of zeros within the 3 Command bits is uneven. The
Parity bit is “0”, if the number of zeros is even.
Address Bits (ADR)
The Address code contains 4 bits and is a binary number. Table 4–5 shows the available addresses for the HAL805, HAL815, HAL817 and HAL1000 registers.
Address Parity Bit (AP)
This Parity bit is “1” if the number of zeros within the 4 Address bits is uneven. The Parity bit is “0” if the number of zeros is even.
Data Bits (DAT)
The 14 Data bits contain the register information.
The registers use a different number formats for the Data bits. These formats are
explained in Section 4.3.4
In the Write command, the last bits are valid. If, for example, the TC register (6 bits) is
written, only the last 6 bits are valid.
In the Read command, the first bits are valid. If, for example, the TC register (6 bits) is
read, only the first 6 bits are valid.
Data Parity Bit (DP)
This parity bit is “1” if the number of zeros within the binary number is even. The parity
bit is “0” if the number of zeros is uneven.
Acknowledge
After each telegram, the output answers with the Acknowledge signal. This logical “0”
pulse defines the exact timing for tpOUT.
Table 4–4:
Available commands
Command
Code
Explanation
READ
2
read a register
WRITE
3
write a register
PROM
4
program all nonvolatile registers (except the lock bits)
ERASE
5
erase all nonvolatile registers (except the lock bits)
LOCK
7
lock the whole device and switch permanently to the analog-mode
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Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
4.3.4.
Binary number:
Number Formats
The most significant bit is given as first, the least significant bit as last digit.
Example:
101001 represents 41 decimal.
Signed binary number:
The first digit represents the sign of the following binary number (1 for negative, 0 for
positive sign).
Example:
0101001 represents +41 decimal
1101001 represents 41 decimal
Two’s-complementary
number:
The first digit of positive numbers is “0”, the rest of the number is a binary number. Negative numbers start with “1”. In order to calculate the absolute value of the number, calculate the complement of the remaining digits and add “1”.
Example:
0101001 represents +41 decimal
1010111 represents 41 decimal
Table 4–5:
Available register addresses
Register
Code
Data
Bits
Format
Customer
Remark
CLAMP LOW
1
10
binary
read/write/program
low clamping voltage
CLAMP HIGH
2
11
binary
read/write/program
high clamping voltage
VOQ
3
11
two compl.
binary
read/write/program
SENSITIVITY
4
14
signed binary
read/write/program
MODE
5
6
binary
read/write/program
range and filter settings
LOCK
6
1
binary
lock
lock bit
ADC-READOUT
7
14
two compl.
binary
read
TC
11
6
signed binary
read/write/program
TCSQ
12
5
binary
read/write/program
DEACTIVATE
15
12
binary
write
Micronas
Sept. 19, 2013; APN000046_03EN
deactivate the sensor
25
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
4.3.5.
Register Information (HAL805/HAL815/HAL817)
Terminology:
REGISTER: Name of the register or register value
Register: Name of the parameter
CLAMP LOW
– The register range is from 0 up to 1023.
– The register value is calculated by:
Low Clamping Voltage
CLAMP LOW = -------------------------------------------------------------- 2048
V DD
CLAMP HIGH
– The register range is from 0 up to 2047.
– The register value is calculated by:
High Clamping Voltage
CLAMP HIGH = ---------------------------------------------------------------- 2048
V DD
VOQ
– The register range is from 1024 up to 1023.
– The register value is calculated by:
V OQ
VOQ = ----------- 1024
V DD
SENSITIVITY
– The register range is from 8192 up to 8191.
– The register value is calculated by:
SENSITIVITY = Sensitivity 2048
TC and TCSQ
– The TC register range is from 31 up to 31.
– The TCSQ register range is from 0 up to 31.
Please refer to the data sheet for the recommended values.
26
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Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
MODE
– The register range is from 0 up to 63 and contains the settings for FILTER and
RANGE:
MODE = FILTER 8 + RANGE
Please refer to the data sheet for the available FILTER and RANGE values.
ADC-READOUT
– This register is read only.
– The register range is from 8192 up to 8191.
DEACTIVATE
– This register can only be written.
– The register has to be written with 2063 decimal (80F hexadecimal) for the deactivation.
– The sensor can be reset with an Activate pulse on the output pin or by switching off
and on the supply voltage.
Note: The register information of the HAL810 is slightly different. However, it is quite
easy to transform voltage values (HAL8x5/HAL817) into output duty cycle
(HAL810) by multiplication with
100%
-------------5V
For detailed register information of the HAL810, please refer to the data sheet.
Micronas
Sept. 19, 2013; APN000046_03EN
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HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
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 command 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 automatically 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.
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Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
4.4.
Data Formats
The protocol between the programmer board and the Hall sensor defines fixed lengths
for the data, command, and address words to be transmitted:
– Command (CMD): 3 bit
– Address (ADR): 4 bit
– Data (DAT): 14 bit
– Command Parity (CP): 1 bit
– Address Parity (AP): 1 bit
– Data Parity (DP): 1 bit
Reminder: For communication with the programmer board, the 14 data bits are
encoded in four ASCII characters: DAT3, DAT2, DAT1, and DAT0.
As every register has a different length, not all of the 14 bits are used. Furthermore,
there is a difference between the write format (transfer board IC) and the read format
(transfer IC board). Table 4–6 shows which of the 14 bits are valid for each register
(write format and read format).
Table 4–6:
Data formats
Register
Char
DAT3
DAT2
DAT1
DAT0
Bit
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
CLAMP LOW
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
CLAMP HIGH
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
VOQ
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
SENSITIVITY
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
MODE
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
ADC-READOUT
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
TC
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
TCSQ
Write
Read
V
V
V
V
V
V
V
V
V
V
DEACTIVATE
Write
1
0
0
0
0
0
0
0
1
1
1
1
V: valid, : ignore, bit order: MSB first
Micronas
Sept. 19, 2013; APN000046_03EN
29
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
4.5.
The Programming Procedure
The general programming procedure is described in detail for the HAL805 (HAL815/
HAL817).
The procedure for the HAL810 is quite similar. However, the multiprogramming (i.e. the
programming of more than one sensor connected to the same supply voltage) does not
apply for the HAL810. Additionally, some register names are different for the HAL810.
Table 4–7:
Cross reference register names
Register HAL8x5
Register HAL810
CLAMP LOW
MIN DUTY
CLAMP HIGH
MAX DUTY
SENSITIVITY
DC SENSITIVITY
VOQ
DCOQ
An example of a programming procedure is given in Fig. 4–6.
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 programmed is activated again by sending a pulse on the corresponding output line, followed by a dummy read command.
Note: The flow chart shown in Fig. 4–6 is intended as a simple example. The multiprogramming loop can also be done within the calibration procedure.
Please keep in mind that the board commands “e...”, “q...”, “m...”, and “t” cause the
board to send back an eight character string to the PC. This string must be read out of
the serial port before sending the next command.
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Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
Example:
BEGIN
INITIALIZE BOARD
STX j 0 ETX
STX z CHR$(85) ETX
STX n ETX
DELAY 20 ms
[Set Board Mode]
[Set Protocol Bittime]
[Switch Vdd on]
MULTIPROGRAMMING
FOR SENSOR = 'a' OR 'b':
STX w 3 1 f 0 0 8 0 f 0 ETX
DELAY 100 ms
STXSENSOR CHR$(25) ETX
STX q 2 0 1 1 ETX
[Deactivate Sensors]
[Select SENSOR]
[Dummy Read]
CALIBRATE SENSOR
END MULTIPROGRAMMING LOOP
END
Fig. 4–6:
Micronas
General procedure
Sept. 19, 2013; APN000046_03EN
31
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
4.5.1.
The Calibration Procedure
The output characteristic is determined by four parameters:
– Clamp Low specifies the lower clamping voltage of the output curve.
– Clamp High specifies the higher clamping voltage of the output curve.
– VOQ corresponds to the output voltage at zero ADC-Readout.
– Sensitivity corresponds to the increase of the output voltage with magnetic field. A
sensitivity of “1” is equivalent to a voltage increase of 5 V at an increase of 2048 of
the ADC-Readout.
The following simple formula relates the analog output voltage to the ADC-Readout
(VDD is considered to be 5.0 V):
ADC-Readout 5 V- + V
V OUT = Sensitivity
------------------------------------------------------------------------------OQ
2048
The calibration procedure is shown in Fig. 4–7. The register values are intended as
example:
Step 1:
Programming of the parameters which do not require individual adjustment:
– Clamp Low, Clamp High, Filter Frequency, Magnetic Range, TC, and TCSQ.
Step 2:
Get the ADC-Readout value in the first calibration point and assign a nominal output
voltage (VOUT,1) to that point.
Step 3:
Get the ADC-Readout value in the second calibration point and assign a nominal output voltage (VOUT,2) to that point.
Step 4:
Calculate and program the values of SENSITIVITY and VOQ.
V OUT2 – V OUT1
2048
Sensitivity = -------------------------------------------------------------------------------------- ----------- ADCReadout 2 – ADCReadout 1 5V
SENSITIVITY = Sensitivity 2048
5V
V OQ = V OUT1 – ADCReadout 1 Sensitivity -----------2048
1024
VOQ = V OQ -----------5V
32
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
BEGIN
WRITE COMMON REGISTER SETTINGS
STX e 3 1 1 1 0 0 c d 0 ETX
STX e 3 1 2 1 0 7 3 3 1 ETX
STX e 3 1 5 0 0 0 1 1 1 ETX
STX e 3 1 b 1 0 0 1 2 0 ETX
STX e 3 1 c 0 0 0 0 A 0 ETX
[Write Clamp Low 0.5 V]
[Write clamp High 4.5 V]
[Write Mode 75 mT / 500 Hz]
[Write TC 18]
[Write TCSQ 10]
STORE
READ ADC-READOUT 1
AT CALIBRATION POINT 1
STX q 2 0 7 1 ETX
READ ADC-READOUT 2
AT CALIBRATION POINT 2
STX q 2 0 7 1 ETX
CALCULATE Sensitivity AND Voq
WRITE SENSITIVITY AND VOQ
STX e 3 1 3 0 DATA DP ETX [Write VOQ]
STX e 3 1 4 1 DATA DP ETX [Write SENSITIVITY]
STORE
END
Fig. 4–7:
Micronas
Calibration procedure
Sept. 19, 2013; APN000046_03EN
33
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
Step 5:
Store the registers permanently.
The “Store” sequence is given in Fig. 4–8. The permanent storing of data into the
EEPROM memory is a two-step process. First, all zero bits (ERASE), then all one bits
(PROM) are written.
BEGIN
SET PROGRAMMING PULSE WIDTH
STX u CHR$(200) ETX
[Pulse Width 100 ms]
ERASE
STX m 5 1 1 1 ETX
[acts on all EEPROM registers]
PROM
STX m 4 0 1 1 ETX
[acts on all EEPROM registers]
END
Fig. 4–8:
34
Store sequence
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
5. Operation Mode 1
HAL805, HAL815, HAL817, HAL810, HAL82x, HAL83x, HAL880, HAL1000 and
HAL1002
This operation mode is set by sending the “j1” command. Unlike the emulation mode
described in the previous section, this operation mode allows the use of additional features which are not implemented in the Hall Programmer Board V 4.1.
Communication:
PC prog. board
Section 5.1 and Section 5.2 contain a detailed description of communication between
the PC and the programmer board V 5.1. Particularly, all board commands available in
the operation mode “j1” are listed.
Communication:
prog. board sensor
The communication between the programmer board and the Hall sensor is described in
Section 5.3
Data formats
The data formats for communication between both the PC and the board, and the
board and the sensor are summarized in Section 5.4
Programming
procedure
Finally, Section 5.5 depicts the programming procedure and gives an example of a
complete programming sequence.
Micronas
Sept. 19, 2013; APN000046_03EN
35
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
5.1.
Definition of the Protocol
The general syntax is as follows (blanks are given for better readability only):
PC Board:
STX BCMD [CMD CP ADR AP] [DAT3 DAT2 DAT1 DAT0 DP] ETX
Board PC:
STX STATUS DAT3 DAT2 DAT1 DAT0 DP ETX
The characters in brackets [...] are optional, depending on the board command BCOM.
Table 5–1:
36
Description of the characters
Character
Description
STX
ASCII character 2
ETX
ASCII character 3
BCMD
Board command
CMD
Command
CP
Command parity
ADR
Address
AP
Address parity
DAT3
DAT2
DAT1
DAT0
Data characters, each encoding 4 bit in HEX format.
Example:
0 1 f 0 (HEX) = 496
DP
Data parity
STATUS
Status/error flag
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
5.2.
The Board Commands BCMD
The board commands activate functions of the firmware. The characters following the
BCMD are the parameters of this function. Some functions serve to control the board
operation and do not address the Hall device.
The read, write, program, and lock functions communicate with the Hall device. The
parameters of these functions are converted into a serial telegram and sent to the connected sensor.
Table 5–2:
Description of the board commands
BCMD
Parameters
Description
n
Switch VDD on
o
Switch VDD off
z[t]
t = 10...255 (as ASCII character)
Set bit time slow mode
bit time = t × 0.02 ms
default: t = 85
default: bit time = 1.7 ms
t = 10...255 (as ASCII character)
Set programming pulse width
width = t × 1.00 ms
set t = 100
set pulse width = 100 ms
n = 1... 4 (as HEX)
t = 10...255 (as ASCII character)
Select sensor n, (default = 1)
select pulse width = t × 4.0 µs
recommended t = 25
recommended pulse width = 100 µs
e[p]
p = CMD CP ADR AP DAT3 DAT2 DAT1 DAT0 DP
Write HAL and echo data to PC
q[p]
p = CMD CP ADR AP
Read HAL and echo data to PC
m[p]
p = CMD CP ADR AP
Program HAL and echo program voltage to PC
l[p]
p = CMD1 CP1 ADR1 AP1 CMD2 CP2 ADR2 AP2
Lock HAL and echo program voltage to PC
u[t]
h[nt]
This command is not valid for HAL 82x, HAL 83x,
and HAL880 and HAL 1002!
v
Request firmware version
Before reading back the firmware version this
command needs to be followed by the “t“ command.
t
Request status and echo data to PC
j[p]
p = 0...3 (as HEX)
Switch board operation mode
0 = EMU board V 4.1 (default)
1 = HAL805, HAL815, HAL817, HAL810,
HAL82x, HAL83x, HAL880, HAL1000, HAL1002
2 = HAL855
3 = HAL856
Micronas
Sept. 19, 2013; APN000046_03EN
37
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
Examples:
Note: Blanks are given for better readability only
5.2.0.1.
HAL805, HAL815, HAL817, HAL810 and HAL1000
STX j 1 ETX
// set board operation mode
STX n ETX
// power on
STX z U ETX
// set bit time slow CHR$(85) = ’U’
STX q 2 0 2 1 ETX
// read register no. 2
STX e 3 1 2 1 0 0 0 A 1 ETX
// write register no. 2
// store sequence start ---------------------------------------------------------------STX u CHR$(100) ETX
// set programming time
STX m 5 1 1 1 ETX
// ERASE
STX m 4 0 1 1 ETX
// PROM
// store sequence end ----------------------------------------------------------------STX e 3 1 F 0 0 8 0 F 0 ETX
// deactivate sensors
STX h 1 CHR$(25) ETX
// select sensor 1
// lock sequence start ----------------------------------------------------------------STX u CHR$(100) ETX
// set programming time
STX l 7 0 6 0 5 1 1 1 ETX
// LOCK-ERASE
// lock sequence end ------------------------------------------------------------------
38
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
5.2.0.2.
HAL82x, HAL83x, HAL880, HAL1002
STX j1 ETX// set board operation mode
STX n ETX// power on
STX z U ETX // set bit time slow CHR$(85) = ’U’
STX q 2 0 2 1 ETX// read register no. 2
STX e 3 1 2 1 0 0 0 A 1 ETX// write register no. 2
// store sequence start ---------------------------------------------------------------STX u CHR$(100) ETX // set programming time
STX m 5 1 0 0 ETX // ERASE
STX m 4 0 0 0 ETX // PROM
// store sequence end ----------------------------------------------------------------STX e 3 1 F 0 0 8 0 F 0 ETX// deactivate sensors
STX h 1 CHR$(25) ETX// select sensor 1
STX q 2 0 2 1 ETX// dummy read
// lock sequence start ----------------------------------------------------------------STX u CHR$(100) ETX// set programming time
STX e 3 1 6 0 0 0 0 1 0 ETX // set LOCK bit
STX m 5 1 0 0 ETX // ERASE
STX m 4 0 0 0 ETX // PROM
5.2.1.
Monitoring of the Programming Voltage
In case of ERASE, PROM, and LOCK, the programming pulse voltage is measured by
the board, and a data string is sent back to the PC. The relation between the data and
the programming voltage is
DAT
V PROG = ------------ 6 2.485 V
4095
If the programming pulse voltage is out of the specification limits, the status bit is set to
“1”.
Examples:
– VPROG = 12.15 V, Data Board PC:
STX 1 0 D 0 A 0 ETX
(DAT = 0 D 0 A)
– VPROG = 12.50 V, Data Board PC:
STX 0 0 D 6 9 0 ETX
(DAT = 0 D 6 9)
Micronas
Sept. 19, 2013; APN000046_03EN
39
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
5.3.
5.3.1.
Programming of the Sensor
Definition of Programming Pulses
The sensor is addressed by modulating a serial telegram on the supply voltage. The
sensor answers with a serial telegram on the output pin.
The bits in the serial telegram have a different bit time for the VDD-line and the output.
The bit time for the VDD-line is defined through the length of the Sync bit at the beginning of each telegram. The bit time for the output is defined through the Acknowledge
bit.
A logical “0” is coded as no voltage change within the bit time. A logical “1” is coded as
a voltage change between 50% and 80% of the bit time. After each bit, a voltage
change occurs.
5.3.2.
Definition of the Telegram
Each telegram starts with the Sync bit (logical 0), 3 bits for the Command (COM), the
Command Parity bit (CP), 4 bits for the Address (ADR), and the Address Parity bit (AP).
There are 4 kinds of telegrams:
Write a register
After the AP bit, follow 14 Data bits (DAT) and the Data Parity bit (DP). If the telegram is
valid and the command has been processed, the sensor answers with an Acknowledge
bit (logical 0) on the output (see Fig. 5–2).
Read a register
After evaluating this command, the sensor answers with the Acknowledge bit, 14 Data
bits, and the Data Parity bit on the output (see Fig. 5–3).
Programming the
EEPROM cells
After evaluating this command, the sensor answers with the Acknowledge bit. After the
delay time tw, the supply voltage rises up to the programming voltage (see Fig. 5–4).
Activate a sensor
If more than one sensor is connected to the supply line, selection can be done by first
deactivating all sensors. The output of all sensors will be pulled to ground. With an Activate pulse on the appropriate output pin, an individual sensor can be selected. All following commands will only be accepted from the activated sensor (see Fig. 5–5).
Note: In case of HAL 82x, HAL83x, HAL 880 and HAL1002 an additional 10 k pulldown resistor is required during programming. Firmware rev. 1.33 can be used
alternatively.
Lock a sensor
40
To lock the EEPROM registers, the lock bit has to be set. In case of HAL 82x, HAL83x,
HAL880 and HAL1002 it is necessary to write the lock bit into the lock register (see
Fig. 5–2). If the telegram is valid and the command has been processed, the sensor
answers with an Acknowledge Bit (logical 0) on the output. In order to store the lock bit
permanently, an erase and program command have to be sent to the sensor. The is the
same procedure as mentioned above (see Programming the EEPROM cells and
Fig. 5–4). The EEPROM registers are locked after a power on reset. For HAL 805,
HAL 815, HAL817, HAL 810 and HAL1000 the lock command must be used.
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
tr
tf
VDDH
tp0
logical 0
tp0
or
VDDL
tp1
VDDH
tp0
logical 1
tp1
VDDL
Fig. 5–1:
Table 5–3:
tp0
or
Definition of logical 0 and 1 bit
Telegram parameters
Symbol
Parameter
Pin
Min.
Typ.
Max.
Unit
VDDL
Supply voltage for low level
during programming
1
5
5.6
6
V
VDDH
Supply voltage for high level
during programming
1
6.8
8.0
8.5
V
tr
Rise time
1
0.05
ms
tf
Fall time
1
0.05
ms
tp0
Bit time on VDD
1
1.7
1.75
1.8
ms
tp0 is defined through the Sync bit
tpOUT
Bit time on output pin
3
2
3
4
ms
tpOUT is defined through the
Acknowledge bit
tp1
Voltage change for logical 1
1, 3
50
65
80
%
% of tp0 or tpOUT
VDDPROG
Supply voltage for
programming the EEPROM
1
12.4
12.5
12.6
V
tPROG
Programming time for EEPROM
1
95
100
105
ms
trp
Rise time of programming voltage
1
0.2
0.5
1
ms
tfp
Fall time of programming voltage
1
0
1
ms
tw
Delay time of programming voltage
after Acknowledge
1
0.5
0.7
1
ms
Vact
Voltage for an Activate pulse
3
3
4
5
V
tact
Duration of an Activate pulse
3
0.05
0.1
0.2
ms
Micronas
Sept. 19, 2013; APN000046_03EN
Remarks
41
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
WRITE
Sync
COM
CP
ADR
AP
DAT
DP
VDD
Acknowledge
VOUT
Fig. 5–2:
Telegram for coding a Write command
READ
Sync
COM
CP
ADR
AP
VDD
Acknowledge
DAT
DP
VOUT
Fig. 5–3:
Telegram for coding a Read command
trp
tPROG
tfp
VDDPROG
ERASE, PROM, and LOCK
Sync
COM
CP
ADR
AP
VDD
Acknowledge
VOUT
tw
Fig. 5–4:
Telegram for coding the EEPROM programming
VACT
tr
tACT
tf
VOUT
Fig. 5–5:
42
Activate pulse
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
5.3.3.
Telegram Codes
Sync Bit
Each telegram starts with the Sync bit. This logical “0” pulse defines the exact timing for
tp0.
Command Bits (COM)
The Command code contains 3 bits and is a binary number. Table 5–4 shows the available commands and the corresponding codes for the HAL805, HAL815, HAL817 and
HAL1000 and Table 5-5 for the HAL82x, HAL83x, HAL880 and HAL1002 registers.
Command Parity Bit
(CP)
This parity bit is “1” if the number of zeros within the 3 Command bits is uneven. The
parity bit is “0”, if the number of zeros is even.
Address Bits (ADR)
The Address code contains 4 bits and is a binary number. Table 5–5 and Table 5-6
shows the available addresses for the HAL805, HAL815, HAL817 and HAL1000 registers and Table 5-5 for the HAL82x, HAL83x, HAL880 and HAL1002 registers.
Address Parity Bit (AP)
This parity bit is “1” if the number of zeros within the 4 address bits is uneven. The parity bit is “0” if the number of zeros is even.
Data Bits (DAT)
The 14 Data bits contain the register information.
The registers use a different number formats for the Data bits. These formats are
explained in Section 5.3.4
In the Write command, the last bits are valid. If, for example, the TC register (6 bits) is
written, only the last 6 bits are valid.
In the Read command, the first bits are valid. If, for example, the TC register (6 bits) is
read, only the first 6 bits are valid.
Data Parity Bit (DP)
This parity bit is “1” if the number of zeros within the binary number is even. The parity
bit is “0” if the number of zeros is uneven.
Acknowledge
After each telegram, the output answers with the Acknowledge signal. This logical “0”
pulse defines the exact timing for tpOUT.
Table 5–4:
Available commands
Command
Code
Explanation
READ
2
read a register
WRITE
3
write a register
PROM
4
program all nonvolatile registers (except the lock bits)
ERASE
5
erase all nonvolatile registers (except the lock bits)
Please note: For HAL82x, HAL83x, HAL880 and HAL1002 the LOCK bit is set by using the WRITE command
followed by a PROM and ERASE (store) sequence.
LOCK
7
lock the whole device and switch permanently to the analog-mode
(only for HAL805, HAL815, HAL817 and HAL1000)
Micronas
Sept. 19, 2013; APN000046_03EN
43
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
5.3.4.
Binary number:
Number Formats
The most significant bit is given as first, the least significant bit as last digit.
Example:
101001 represents 41 decimal.
Signed binary number:
The first digit represents the sign of the following binary number (1 for negative, 0 for
positive sign).
Example:
0101001 represents +41 decimal
1101001 represents 41 decimal
Two’s-complementary
number:
The first digit of positive numbers is “0”, the rest of the number is a binary number. Negative numbers start with “1”. In order to calculate the absolute value of the number, calculate the complement of the remaining digits and add “1”.
Example:
0101001 represents +41 decimal
1010111 represents 41 decimal
Table 5–5:
Available register addresses of HAL805, HAL815, HAL817 and HAL1000
Register
Code
Data
Bits
Format
Customer
Remark
CLAMP LOW
1
10
binary
read/write/program
low clamping voltage
CLAMP HIGH
2
11
binary
read/write/program
high clamping voltage
VOQ
3
11
two compl.
binary
read/write/program
SENSITIVITY
4
14
signed binary
read/write/program
MODE
5
6
binary
read/write/program
range and filter settings
LOCK
6
1
binary
lock
lock bit
ADC-READOUT
7
14
two compl.
binary
read
TC
11
6
signed binary
read/write/program
TCSQ
12
5
binary
read/write/program
DEACTIVATE
15
12
binary
write
44
Sept. 19, 2013; APN000046_03EN
deactivate the sensor
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
Table 5–6: Available register addresses of HAL82x, HAL83x, HAL880 and HAL1002
Register
Code
Data
Bits
Format
Customer
Remark
CLAMP LOW
1
8
binary
read/write/program
low clamping voltage
CLAMP HIGH
2
9
binary
read/write/program
high clamping voltage
VOQ
3
11
two compl.
binary
read/write/program
SENSITIVITY
4
14
signed binary
read/write/program
MODE (only HAL82x
and HAL880)
5
8
binary
read/write/program
range, filter, output mode,
interface bit time settings
MODE (only HAL83x)
5
10
binary
read/write/program
range, filter, output mode,
offset correction settings
LOCK
6
2
binary
read/write/program
lock bit
GP1..3
8
13
binary
read/write/program
It is only possible to program
this register if the mode register bit zero is set to 1.
D/A-READOUT
9
14
binary
read
Bit sequence is reversed
during read sequence.
TC
11
10
binary
read/write/program
bit 0 to 2 TCSQ
bit 3 to 7 TC
bit 7 to 9 TC-RANGE
GP0
12
13
binary
read/write/program
It is only possible to program
this register if the mode register bit zero is set to 1.
DEACTIVATE
15
12
binary
write
deactivate the sensor
Micronas
Sept. 19, 2013; APN000046_03EN
45
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
5.3.5.
Register Information (HAL805 / HAL815 / HAL817)
Terminology:
REGISTER: Name of the register or register value
Register: Name of the parameter
CLAMP LOW
– The register range is from 0 up to 1023.
– The register value is calculated by:
Low Clamping Voltage
CLAMP LOW = ------------------------------------------------------- 2048
V DD
CLAMP HIGH
– The register range is from 0 up to 2047.
– The register value is calculated by:
High Clamping Voltage
CLAMP HIGH = ---------------------------------------------------------- 2048
V DD
VOQ
– The register range is from 1024 up to 1023.
– The register value is calculated by:
V OQ
VOQ = ----------- 1024
V DD
SENSITIVITY
– The register range is from 8192 up to 8191.
– The register value is calculated by:
SENSITIVITY = Sensitivity 2048
TC and TCSQ
– The TC register range is from 31 up to 31.
– The TCSQ register range is from 0 up to 31.
Please refer to the data sheet for the recommended values.
46
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
MODE
– The register range is from 0 up to 63 and contains the settings for FILTER and
RANGE:
MODE = FILTER 8 + RANGE
Please refer to the data sheet for the available FILTER and RANGE values.
ADC-READOUT
– This register is read only.
– The register range is from 8192 up to 8191.
DEACTIVATE
– This register can only be written.
– The register has to be written with 2063 decimal (80F hexadecimal) for the deactivation.
– The sensor can be reset with an Activate pulse on the output pin or by switching off
and on the supply voltage.
Note: The register information of the HAL810 is slightly different. However it is quite
easy to transform voltage values (HAL8x5) into output duty cycle (HAL810) by
multiplication with
100%
-------------5V
For detailed register information of the HAL810, please refer to the data sheet.
Micronas
Sept. 19, 2013; APN000046_03EN
47
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
5.3.6.
Register Information (HAL82x / HAL83x / HAL880 / HAL1002)
Terminology:
REGISTER: Name of the register or register value
Register: Name of the parameter
CLAMP LOW
– The register range is from 0 up to 1023.
– The register value is calculated by:
Low Clamping Voltage 2
CLAMP LOW = ----------------------------------------------------------------- 255
V DD
CLAMP HIGH
– The register range is from 0 up to 511.
– The register value is calculated by:
High Clamping Voltage
CLAMP HIGH = --------------------------------------------------------- 511
V DD
VOQ
– The register range is from 1024 up to 1023.
– The register value is calculated by:
V OQ
VOQ = ----------- 1024
V DD
SENSITIVITY
– The register range is from 8192 up to 8191.
– The register value is calculated by:
SENSITIVITY = Sensitivity 2048
48
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
TC
– The TC register range is from 0 up to 1023.
– The register value is calculated by:
TC = GROUP 256 + TCValue 8 + TCSQValue
Please refer to the data sheet for the recommended values.
MODE (HAL82x,
HAL880)
– The register range is from 0 up to 255 and contains the settings for FILTER and
RANGE:
MODE = OUTPUTMODE 32 + BITRATE 16 + FILTER 8 + RANGE 2 +
EnableProgGPRegisters
Please refer the data sheet for the available FILTER and RANGE values.
MODE (HAL83x,
HAL1002)
– The register range is from 0 up to 1023 and contains the settings for FILTER,
RANGE, OUTPUTMODE and OFFSET CORRECTION:
MODE = RANGE 512 + SIGNOC 256 + OUTPUTMODE 32 + FILTER 8 +
RANGE 2 + OFFSETCORRECTION
Please refer the data sheet for the available RANGE, OUTPUTMODE, FILTER and
OFFSETCORRECTION values.
D/A-READOUT
– This register is read only.
– The register range is from 0 up to 16383
DEACTIVATE
– This register can only be written.
– The register has to be written with 2063 decimal (80F hexadecimal) for the deactivation.
The sensor can be reset with an Activate pulse on the output pin or by switching off and
on the supply voltage.
Micronas
Sept. 19, 2013; APN000046_03EN
49
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
5.3.7.
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 command followed by sending a PROM command. For HAL 82x, HAL83x, HAL880 and
HAL1002 the address within the ERASE and PROM commands must be zero. ERASE
and PROM act on all registers in parallel.
Note: To store data in the GP register (only HAL82x, HAL83x, HAL880 and HAL1002)
it is necessary to set bit number 0 of the MODE register to one, before sending
an ERASE and PROM command. Otherwise the data stored in the GP register
will not be changed.
If all HAL805, HAL815, HAL817, HAL82x, HAL83x, HAL880, HAL1000 and HAL1002
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. In case of HAL 805/815/817/810/1000 Micronas also
recommends sending an additional ERASE command after sending the LOCK
command (This is done automatically 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.
50
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
5.4.
Data Formats
The protocol between the programmer board and the Hall sensor defines fixed lengths
for the data, command, and address words to be transmitted:
– Command (CMD): 3 bit
– Address (ADR): 4 bit
– Data (DAT): 14 bit
– Command Parity (CP): 1 bit
– Address Parity (AP): 1 bit
– Data Parity (DP): 1 bit
Reminder: For communication with the programmer board, the 14 data bits are
encoded in four ASCII characters: DAT3, DAT2, DAT1, and DAT0.
As every register has a different length, not all of the 14 bits are used. Furthermore,
there is a difference between the write format (transfer board IC) and the read format
(transfer IC board). Table 5–7 and Table 5-7 show which of the 14 bits are valid for
each register (write format and read format).
Table 5–7:
Data formats of HAL805, HAL810, HAL815, HAL817 and HAL1000
Register
Char
DAT3
DAT2
DAT1
DAT0
Bit
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
CLAMP LOW
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
CLAMP HIGH
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
VOQ
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
SENSITIVITY
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
MODE
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
ADC-READOUT
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
TC
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
TCSQ
Write
Read
V
V
V
V
V
V
V
V
V
V
DEACTIVATE
Write
-
-
1
0
0
0
0
0
0
0
1
1
1
1
V: valid, : ignore, bit order: MSB first.
Micronas
Sept. 19, 2013; APN000046_03EN
51
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
Table 5–8:
Register
Char
Data formats of HAL82x, HAL83x, HAL880 and HAL1002
DAT3
DAT2
DAT1
DAT0
Bit
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
CLAMP LOW
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
CLAMP HIGH
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
VOQ
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
SENSITIVITY
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
MODE (onlyHAL82x and
HAL880)
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
MODE (only HAL83x)
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
LOCKR
Write
Read
V
V
V
V
GP1..3
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
D/A-READOUT
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
TC
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
GP0
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
DEACTIVATE
Write
1
0
0
0
0
0
0
0
1
1
1
1
V: valid, : ignore, bit order: MSB first
52
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
5.5.
5.5.1.
The Programming Procedure
Programming Procedure for HAL805, HAL810, HAL815, HAL817
and HAL1000
The general programming procedure is described in detail for the HAL805 (HAL815/
HAL817).
The procedure for the HAL810 is quite similar. However, the multiprogramming (i.e. the
programming of more than one sensor connected to the same supply voltage) does not
apply for the HAL810. Additionally, some register names are different for the HAL810.
Table 5–9:
Cross reference register names
Register HAL8x5/
HAL817
Register HAL810
CLAMP LOW
MIN DUTY
CLAMP HIGH
MAX DUTY
SENSITIVITY
DC SENSITIVITY
VOQ
DCOQ
An example of a programming procedure is given in Fig. 5–6.
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 programmed is activated again by sending a pulse on the corresponding output line, followed by a dummy read command.
Note: The flow chart given in Fig. 5–6 is intended as a simple example. The multiprogramming loop can also be done within the calibration procedure.
Please keep in mind that the board commands “e...”, “q...”, “m...”, and “t” cause the
board to send back an eight character string to the PC. This string must be read out of
the serial port before sending the next command.
Micronas
Sept. 19, 2013; APN000046_03EN
53
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
Example:
BEGIN
INITIALIZE BOARD
STX j 1 ETX
STX z CHR$(85) ETX
STX n ETX
DELAY 20 ms
[Set Board Mode]
[Set Protocol Bittime]
[Switch Vdd on]
MULTIPROGRAMMING
FOR SENSOR = 1 TO 4:
STX w 3 1 f 0 0 8 0 f 0 ETX
DELAY 100 ms
STX h SENSOR CHR$(25) ETX
STX q 2 0 1 1 ETX
[Deactivate Sensors]
[Select SENSOR]
[Dummy Read]
CALIBRATE SENSOR
END MULTIPROGRAMMING LOOP
END
Fig. 5–6:
54
General procedure
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
5.5.2.
The Calibration Procedure
The output characteristic is determined by four parameters:
– Clamp Low specifies the lower clamping voltage of the output curve.
– Clamp High specifies the higher clamping voltage of the output curve.
– VOQ corresponds to the output voltage at zero ADC-Readout.
– Sensitivity corresponds to the increase of the output voltage with magnetic field. A
sensitivity of “1” is equivalent to a voltage increase of 5 V at an increase of 2048 of
the ADC-Readout.
The following simple formula relates the analog output voltage to the ADC-Readout
(VDD is considered to be 5.0 V):
ADC-Readout 5 V- + V
V OUT = Sensitivity
------------------------------------------------------------------------------OQ
2048
The calibration procedure is shown in Fig. 5–7. The register values are intended as an
example:
Step 1:
Programming of the parameters which do not require individual adjustment:
– Clamp Low, Clamp High, Filter Frequency, Magnetic Range, TC, and TCSQ.
Step 2:
Get the ADC-Readout value in the first calibration point and assign a nominal output
voltage (VOUT,1) to that point.
Step 3:
Get the ADC-Readout value in the second calibration point and assign a nominal output voltage (VOUT,2) to that point.
Step 4:
Calculate and program the values of SENSITIVITY and VOQ.
V OUT2 – V OUT1
2048
Sensitivity = -------------------------------------------------------------------------------------- ----------- ADCReadout 2 – ADCReadout 1 5V
SENSITIVITY = Sensitivity 2048
5V
V OQ = V OUT1 – ADCReadout 1 Sensitivity -----------2048
1024
VOQ = V OQ -----------5V
Micronas
Sept. 19, 2013; APN000046_03EN
55
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
BEGIN
WRITE COMMON REGISTER SETTINGS
STX e 3 1 1 1 0 0 c d 0 ETX
STX e 3 1 2 1 0 7 3 3 1 ETX
STX e 3 1 5 0 0 0 1 1 1 ETX
STX e 3 1 b 1 0 0 1 2 0 ETX
STX e 3 1 c 0 0 0 0 A 0 ETX
[Write Clamp Low 0.5 V]
[Write clamp High 4.5 V]
[Write Mode 75 mT / 500 Hz]
[Write TC 18]
[Write TCSQ 10]
STORE
READ ADC-READOUT 1
AT CALIBRATION POINT 1
STX q 2 0 7 1 ETX
READ ADC-READOUT 2
AT CALIBRATION POINT 2
STX q 2 0 7 1 ETX
CALCULATE Sensitivity AND Voq
WRITE SENSITIVITY AND VOQ
STX e 3 1 3 0 DATA DP ETX [Write VOQ]
STX e 3 1 4 1 DATA DP ETX [Write SENSITIVITY]
STORE
END
Fig. 5–7:
56
Calibration procedure
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
Step 5:
Store the registers permanently.
The “Store” sequence is given in Fig. 5–8. The permanent storing of data into the
EEPROM memory is a two-step process. First, all zero bits (ERASE), then all one bits
(PROM) are written.
BEGIN
SET PROGRAMMING PULSE WIDTH
STX u CHR$(100) ETX
[Pulse Width 100 ms]
ERASE
STX m 5 1 1 1 ETX
[acts on all EEPROM registers]
PROM
STX m 4 0 1 1 ETX
[acts on all EEPROM registers]
END
Fig. 5–8:
Micronas
Store sequence
Sept. 19, 2013; APN000046_03EN
57
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
5.5.3.
Programming Procedure for HAL82x, HAL83x, HAL880 and HAL1002
The general programming procedure is described in detail for the HAL82x, HAL83x,
HAL880 and HAL1002.
An example of a programming procedure is given in Fig. 5–6.
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 programmed is activated again by sending a pulse on the corresponding output line, followed by a dummy read command.
Note: The flow chart given in Fig. 5–6 is intended as a simple example. The multiprogramming loop can also be done within the calibration procedure.
Please keep in mind that the board commands “e...”, “q...”, “m...”, and “t” cause the
board to send back an eight character string to the PC. This string must be read out of
the serial port before sending the next command.
Example:
%(*,1
:5,7(&200215(*,67(56(77,1*6
67;H(7; >:ULWH02'(P7+]$QDORJELW@
67;H(7; >:ULWH7& 7&64 7&5DQJH @
67;H(7; >:ULWH*32@
,1,7,$/,=('63
67;H))(7;
67;H(7;
67;H(7;
67;H(7;
>:ULWH&ODPS+LJK9@
>:ULWH6HQVLWLYLW\@
>:ULWH9RT9@
>:ULWH&ODPS/RZ9@
6725(
5($''$5($'287
$7&$/,%5$7,2132,17
67;T(7;
5($''$5($'287
$7&$/,%5$7,2132,17
67;T(7;
&$/&8/$7(6HQVLWLYLW\$1'9RT
:5,7(6(16,7,9,7<924&/$03/2:$1'&/$03+,*+
67;H'$7$'3(7;
67;H'$7$'3(7;
67;H'$7$'3(7;
67;H'$7$'3(7;
>:ULWH924@
>:ULWH6(16,7,9,7<@
>:ULWH&/$03/2:@
>:ULWH&/$03+,*+@
6725(
(1'
Fig. 5–9:
58
General procedure
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
5.5.4.
The Calibration Procedure
The output characteristic is determined by four parameters:
– Clamp Low specifies the lower clamping voltage of the output curve.
– Clamp High specifies the higher clamping voltage of the output curve.
– VOQ corresponds to the output voltage at zero magnetic field.
– Sensitivity describes the magnetic sensitivity of the sensor.
The following simple formula relates the analog output voltage to the D/A-Readout
(VDD is considered to be 5.0 V):
SENSITIVITY
V OUT = ------------------------------------ 2 DA-Readout 5
16384
The calibration procedure is shown in Fig. 5–7. The register values are intended as an
example:
Step 1:
Programming of the parameters which do not require individual adjustment:
– Filter Frequency, Magnetic Range, Output Mode, TC (TC, TCSQ and TC-Range)
and GP.
Step 2:
Initialize DSP
As the D/A-READOUT register value depends on the settings of SENSITIVITY,
VOQ and CLAMP LOW/HIGH, these registers have to be initialized with defined values, first:
– VOQINITIAL = 2.5 V
– SensitivityINITIAL = 0.5
– Clamp Low = 0 V
– Clamp High = 4.999 V
Step 3:
Get the DA-Readout value in the first calibration point and assign a nominal output voltage (VOUT,1) to that point.
Step 4:
Get the DA-Readout value in the second calibration point and assign a nominal output
voltage (VOUT,2) to that point.
Step 5:
Calculate and program the values of SENSITIVITY and VOQ.
1
Vout2 – Vout1
16384
Sensitivity = --- ---------------------------------------------------------------------------------------- --------------2 D/A-Readout2 – D/A-Readout1
5
1
5 16384- – D/A-Readout2 – 8192 Sensitivity 2 ----------V OQ = ------ Vout2
-----------------------------------16
1024
5
Write and program values for Clamp High and Clamp Low
Micronas
Sept. 19, 2013; APN000046_03EN
59
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
%(*,1
:5,7(&200215(*,67(56(77,1*6
67;H(7; >:ULWH02'(P7+]$QDORJELW@
67;H(7; >:ULWH7& 7&64 7&5DQJH @
67;H(7; >:ULWH*32@
,1,7,$/,=('63
67;H))(7;
67;H(7;
67;H(7;
67;H(7;
>:ULWH&ODPS+LJK9@
>:ULWH6HQVLWLYLW\@
>:ULWH9RT9@
>:ULWH&ODPS/RZ9@
6725(
5($''$5($'287
$7&$/,%5$7,2132,17
67;T(7;
5($''$5($'287
$7&$/,%5$7,2132,17
67;T(7;
&$/&8/$7(6HQVLWLYLW\$1'9RT
:5,7(6(16,7,9,7<924&/$03/2:$1'&/$03+,*+
67;H'$7$'3(7;
67;H'$7$'3(7;
67;H'$7$'3(7;
67;H'$7$'3(7;
>:ULWH924@
>:ULWH6(16,7,9,7<@
>:ULWH&/$03/2:@
>:ULWH&/$03+,*+@
6725(
(1'
Fig. 5–10: Calibration procedure
60
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
Step 6:
Store the registers permanently.
The “Store” sequence is given in Fig. 5–8. The permanent storing of data into the
EEPROM memory is a two-step process. First, all zero bits (ERASE), then all one bits
(PROM) are written.
%(*,1
6(7352*5$00,1*38/6(:,'7+
67;X&+5 (7;
>3XOVH:LGWKPV@
(5$6(
67;P(7; >DFWVRQDOO((3520UHJLVWHUV@
3520
67;P(7; >DFWVRQDOO((3520UHJLVWHUV@
(1'
Fig. 5–11: Store sequence
Micronas
Sept. 19, 2013; APN000046_03EN
61
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
6. Operation Mode 2
HAL855
This operation mode is set by sending the “j2” command.
Communication:
PC prog. board
Section 6.1 and Section 6.2 contain a detailed description of communication between
the PC and the programmer board V 5.1. Particularly, all board commands available in
the operation mode “j2” are listed.
Communication:
prog. board sensor
The communication between the programmer board and the Hall sensor is described in
Section 6.3
Data formats
The data formats for communication between both the PC and the board, and the
board and the sensor are summarized in Section 6.4
Programming
procedure
Finally, Section 6.5 depicts the programming procedure and gives an example of a
complete programming sequence.
62
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
6.1.
Definition of the Protocol
The general syntax is as follows (blanks are given for better readability only):
PC Board:
STX BCMD [CMD CP ADR AP] [DAT3 DAT2 DAT1 DAT0 DP] ETX
Board PC:
STX STATUS DAT3 DAT2 DAT1 DAT0 DP ETX
The characters in brackets [...] are optional, depending on the board command BCOM.
Table 6–1:
Micronas
Description of the characters
Character
Description
STX
ASCII character 2
ETX
ASCII character 3
BCMD
Board command
CMD
Command
CP
Command parity
ADR
Address
AP
Address parity
DAT3
DAT2
DAT1
DAT0
Data characters, each encoding 4 bit in HEX format.
Example:
0 1 f 0 (HEX) = 496
DP
Data parity
STATUS
Status/error flag
Sept. 19, 2013; APN000046_03EN
63
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
6.2.
The Board Commands BCMD
The board commands activate functions of the firmware. The characters following the
BCMD are the parameters of this function. Some functions serve to control the board
operation and do not address the Hall device.
The read, write, program, and lock functions communicate with the Hall device. The
parameters of these functions are converted into a serial telegram and sent to the connected sensor.
Table 6–2:
Description of the board commands
BCMD
Parameters
Description
n
Switch VDD on
o
Switch VDD off
z[t]
t = 30...255 (as ASCII character)
Set bit time slow mode
bit time = t × 0.02 ms
default: t = 85 (HAL855)
default bit time = 1.7 ms (HAL855)
t = 30...255 (as ASCII character)
Set programming pulse width
width = t × 1.00 ms
HAL855: set t = 100
HAL855: set pulse width = 100 ms.
t = 10...255
Delay Acknowledge
width = t × 64.0 µs
HAL855: set t = 11
HAL855 set width = 0.7 ms
n = 1... 4 (as HEX)
t = 10...255 (as ASCII character)
Select sensor n, (default = 1)
select pulse width = t × 4.0 µs
recommended t = 25
recommended pulse width = 100 µs
e[p]
p = CMD CP ADR AP DAT3 DAT2 DAT1 DAT0 DP
Write HAL and echo data to PC
q[p]
p = CMD CP ADR AP
Read HAL and echo data to PC
c[p]
p = CMD1 CP1 ADR1 AP1 CMD2 CP2 ADR2 AP2
CMD3 CP3 ADR3 AP3
Program HAL and echo answer to PC
k[p]
p = CMD1 CP1 ADR1 AP1 CMD2 CP2 ADR2 AP2
Program LOCK bit and echo answer to PC
u[t]
y[t]
h[nt]
i
64
Read Biphase M sequence
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
Table 6–2:
Description of the board commands, continued
BCMD
Parameters
Description
m[p]
p = 0 ... 7 (as HEX)
Read PWM sequence
p = PWM period (2p in ms).
v
Request firmware version
t
Request status and echo data to PC
j[p]
p = 0...3 (as HEX)
Switch board operation mode
0 = EMU Board V 4.1 (default)
1 = HAL805, HAL815, HAL817, HAL810,
HAL 82x, HAL83x, HAL 880, HAL100x
2 = HAL855
3 = HAL856
Examples:
(Blanks are given for better readability only)
– set board operation mode:
STX j 2 ETX
– power on:
STX n ETX
– set bit time slow CHR$(85) = ’U’:
STX z U ETX
– read register no. 2:
STX q 0 1 2 1 ETX
– write register no. 2:
STX e 3 1 2 1 0 0 0 A 1 ETX
– write output characteristic setpoint 0:
STX e 1 0 0 0 0 0 0 0 1 ETX
– write output characteristic setpoint 16:
STX e 2 0 0 0 0 1 0 0 0 ETX
– read output characteristic setpoint 15:
STX e 6 1 f 0 ETX
– read output characteristic setpoint 31:
STX q 7 0 f 0 ETX
– store sequence:
STX u CHR$(100) ETX (set programming time)
STX y CHR$(11) ETX (set delay of Acknowledge)
STX c 5 1 3 0 4 0 3 0 6 1 0 0 ETX
(ERASE-PROM-READ)
– deactivate sensors:
STX e 3 1 F 0 0 8 0 F 0 ETX
– select sensor 1:
STX h 1 CHR$(25) ETX
– lock sensors
STX e 3 1 6 0 0 0 0 1 0 ETX (set Lock bit)
STX u CHR$(100) ETX (set programming time)
STX y CHR$(11) ETX (set delay of Acknowledge)
STX k 4 0 6 0 0 1 3 0 ETX (PROM-READ)
Micronas
Sept. 19, 2013; APN000046_03EN
65
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
6.2.1.
Monitoring of the Supply Voltage
In case of ERASE, PROM, and LOCK, the supply voltage is measured by the board,
and a data string is sent back to the PC. The relation between the data and the supply
voltage is
DAT
V PROG = ------------ 6 2.485 V
4095
If the supply voltage is out of the specification limits, the status bit is set to “1”.
Examples:
– VPROG = 4.80 V, Data board PC:
STX 1 0 5 2 6 0 ETX
(DAT = 0 5 2 6)
– VPROG = 5.00 V, Data board PC:
STX 0 0 5 5 D 0 ETX
(DAT = 0 5 5 D)
66
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
6.3.
6.3.1.
Programming of the Sensor
Definition of Programming Pulses
The sensor is addressed by modulating a serial telegram on the supply voltage. The
sensor answers with a serial telegram on the output pin.
The bits in the serial telegram have a different bit time for the VDD-line and the output.
The bit time for the VDD-line is defined through the length of the Sync bit at the beginning of each telegram. The bit time for the output is defined through the Acknowledge
bit.
A logical “0” is coded as no voltage change within the bit time. A logical “1” is coded as
a voltage change between 50% and 80% of the bit time. After each bit, a voltage
change occurs.
6.3.2.
Definition of the Telegram
Each telegram starts with the Sync bit (logical 0), 3 bits for the Command (COM), the
Command Parity bit (CP), 4 bits for the Address (ADR), and the Address Parity bit (AP).
There are 4 kinds of telegrams:
Write a register
Write a register
After the AP bit, follow 14 Data bits (DAT) and the Data Parity bit (DP). If the telegram is
valid and the command has been processed, the sensor answers with an Acknowledge
bit (logical 0) on the output (see Fig. 6–2).
Read a register
After evaluating this command, the sensor answers with the Acknowledge bit, 14 Data
bits, and the Data Parity bit on the output (see Fig. 6–3).
Programming the
EEPROM cells
In order to permanently store the written data into the EEPROM cells, an erase and
program command have to be sent to the sensor. After the recognition of the erase and
program commands, the HAL855 answers with an acknowledge pulse on its output signal. After the acknowledge pulse, a pulse on the VDD-line is created to start the charging of the EEPROM cells. Then, the supply voltage is kept constant during the charging
time. To stop the charging, a further command is sent to the HAL855. This stopping
command can be a further programming command or a read command (see Fig. 6–5).
Activate a sensor
If more than one sensor is connected to the supply line, selection can be done by first
deactivating all sensors. With an Activate pulse on the appropriate output pin, an individual sensor can be selected. All following commands will only be accepted from the
activated sensor (see Fig. 6–4).
Lock a sensor
To lock the EEPROM registers, the lock bit has to be programmed. Write the lock bit
into the lock register (see Fig. 6–2). If the telegram is valid and the command has been
processed, the sensor answers with an Acknowledge Bit (logical 0) on the output. In
order to store the lock bit permanently, an erase and program command have to be
sent to the sensor. This is the same procedure as mentioned above (see Programming
the EEPROM cells and Fig. 6–5). The EEPROM registers are locked after a power on
reset.
Micronas
Sept. 19, 2013; APN000046_03EN
67
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
tr
tf
VDDH
tp0
logical 0
tp0
or
VDDL
tp1
VDDH
tp0
logical 1
tp1
VDDL
Fig. 6–1:
Table 6–3:
tp0
or
Definition of logical 0 and 1 bit
Telegram parameters
Symbol
Parameter
Pin
Min.
Typ.
Max.
Unit
VDDL
Supply voltage for low level
during programming
1
5
5.6
6
V
VDDH
Supply voltage for high level
during programming
1
6.8
8.0
8.5
V
VDDPROG
Supply voltage for permanent
storing of the data
1
4.9
5.0
5.1
V
tr
Rise time
1
0.05
ms
tf
Fall time
1
0.05
ms
tp0
Bit time on VDD
1
1.7
1.75
1.8
ms
tp0 is defined through the Sync bit
tpOUT
Bit time on output pin
3
2
3
4
ms
tpOUT is defined through the
Acknowledge bit
tp1
Voltage change for logical 1
1, 3
50
65
80
%
% of tp0 or tpOUT
tPROG
Programming time for EEPROM
1
95
100
105
ms
trp
Rise time of charging pulse
1
0.2
0.5
1
ms
tfp
Fall time of charging pulse
1
0
1
ms
tw
Delay time of charging pulse after
Acknowledge
1
0.5
0.7
1
ms
Vact
Voltage for an Activate pulse
3
0
0
0.5
V
tact
Duration of an Activate pulse
3
0.05
0.1
0.2
ms
68
Sept. 19, 2013; APN000046_03EN
Remarks
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
WRITE
Sync
COM
CP
ADR
AP
DAT
DP
VDD
HAL855:
VOUT
HAL856:
IDD
Fig. 6–2:
Telegram for coding a Write command
READ
Sync
COM
CP
ADR
AP
VDD
Acknowledge
HAL855:
VOUT
DAT
DP
HAL856:
IDD
Fig. 6–3:
Telegram for coding a Read command
VOUT
VACT
tf
Fig. 6–4:
Micronas
tACT
tr
Activate pulse
Sept. 19, 2013; APN000046_03EN
69
APPLICATION NOTE
Micronas
STORE
Sync
COM1
CP1
ADR1
AP1
Sync
COM2
CP2
ADR2
AP2
Sync
COM3
CP3
ADR3
AP3
VDD
Acknowledge
HAL855:
VOUT
HAL856:
IDD
Acknowledge
DAT
DP
A
Start the Charge Pump
Stop the Charge Pump
VDD
Detail A
HAL855:
VOUT
HAL856:
IDD
Sept. 19, 2013; APN000046_03EN
2 x Delay Time
Fig. 6–5:
Programming Time
Telegram for programming the EEPROM
HAL8xy, HAL100x
Programmer Board
70
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
6.3.3.
Telegram Codes
Sync Bit
Each telegram starts with the Sync bit. This logical “0” pulse defines the exact timing for
tp0.
Command Bits (COM)
The Command code contains 3 bits and is a binary number. Table 6–4 shows the available commands and the corresponding codes for the HAL855.
Command Parity Bit
(CP)
This parity bit is “1” if the number of zeros within the 3 command bits is uneven. The
parity bit is “0”, if the number of zeros is even.
Address Bits (ADR)
The Address code contains 4 bits and is a binary number. Table 6–5 shows the available addresses for the HAL855 registers.
Address Parity Bit (AP)
This parity bit is “1” if the number of zeros within the 4 address bits is uneven. The parity bit is “0” if the number of zeros is even.
Data Bits (DAT)
The 14 Data bits contain the register information.
The registers use different number formats for the Data bits. These formats are
explained in Section 6.3.4
In the Write command, the last bits are valid. If, for example, the TC register (6 bits) is
written, only the last 6 bits are valid.
In the Read command, the first bits are valid. If, for example, the TC register (6 bits) is
read, only the first 6 bits are valid.
Data Parity Bit (DP)
This parity bit is “1” if the number of zeros within the binary number is even. The parity
bit is “0” if the number of zeros is uneven.
Acknowledge
After each telegram, the output answers with the Acknowledge signal. This logical “0”
pulse defines the exact timing for tpOUT.
Table 6–4:
Available commands
Command
Code
Explanation
READ
0
read a Setup EEPROM register (like TC, TCSQ, magnetic range, etc.)
READL
6
read a Characteristics EEPROM register (setpoints 0 to 15)
READH
7
read a Characteristics EEPROM register (setpoints 16 to 31)
WRITE
3
write a Setup EEPROM register (like TC, TCSQ, Magnetic range, etc.)
WRITEL
1
write a Characteristics EEPROM register (setpoints 0 to 15)
WRITEH
2
write a Characteristics EEPROM register (setpoints 16 to 31)
PROM
4
program all non-volatile registers
ERASE
5
erase all non-volatile registers
Please note: The Lock bit is set by using the WRITE command followed by a PROM.
Micronas
Sept. 19, 2013; APN000046_03EN
71
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
6.3.4.
Binary number:
Number Formats
The most significant bit is given as first, the least significant bit as last digit.
Example:
101001 represents 41 decimal.
Signed binary number:
The first digit represents the sign of the following binary number (1 for negative, 0 for
positive sign).
Example:
0101001 represents +41 decimal
1101001 represents 41 decimal
Two’s-complementary
number:
The first digit of positive numbers is “0”, the rest of the number is a binary number. Negative numbers start with “1”. In order to calculate the absolute value of the number, calculate the complement of the remaining digits and add “1”.
Example:
0101001 represents +41 decimal
1010111 represents 41 decimal
Table 6–5:
Available register addresses
Register
Code
Data Bits
Format
Customer
Remark
CURRENTSOURCE
1
10
binary
read/write/program
In case of HAL855:
used to define output slew rate
In case of HAL856:
used to define output
current levels
(IDD_HIGH and IDD_LOW)
PARTNUMBER
2
11
binary
read/write/program
SHIFT
3
11
two’s compl.
read/write/program
SLOPE
4
14
signed binary
read/write/program
MODE
5
14
binary
read/write/program
range, filter, and output format settings
LOCK
6
1
binary
write/program
lock bit
DIGITAL
READOUT
7
12
binary
read
digital value after signal processing
OFFSET
CORRECTION
8
5
two’s compl.
(4 LSBs)
read/write/program
compensation of system offsets
SPECIALCUST.
9
6
binary
read/write/program
special customer register to define
Biphase-M bittime and Partnumber Enable
TC
11
6
signed binary
(6 LSBs)
read/write/program
linear temperature coefficient
TCSQ
12
5
binary
read/write/program
quadratic temperature coefficient
DEACTIVATE
15
11
binary
write
deactivate the sensor
CURVE LOW
0...15
9
binary
write/read/program
setpoints 0 to 15
CURVE HIGH
0...15
9
binary
write/read/program
setpoints 16 to 31
72
Sept. 19, 2013; APN000046_03EN
only with Biphase-M mode
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
6.3.5.
Register Information
Terminology
REGISTER: Name of the register or register value
Register: Name of the parameter
PARTNUMBER
– The register range is from 0 up to 2047.
SHIFT
– The register range is from 1024 up to 1023.
– The register value is calculated by:
Shift
SHIFT = -------------- 1024
100%
SLOPE
– The register range is from 8192 up to 8191.
– The register value is calculated by:
SLOPE = Slope 2048
TC and TCSQ
– The TC register range is from 31 up to 31.
– The TCSQ register range is from 0 up to 31.
Please refer to the data sheet for the recommended values.
Note: The word length of the TC register is 7 bit. The six LSBs represent a signed
binary number. The MSB has to be ignored.
Micronas
Sept. 19, 2013; APN000046_03EN
73
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
MODE
– The register range is from 0 up to 16383 and contains the settings for PERIOD,
FORMAT, FILTER, and RANGE:
MODE = PERIOD 512 + FORMAT 64 + FILTER 8 + RANGE
Please refer to the data sheet for the available PERIOD, FORMAT, FILTER, and
RANGE values.
DIGITAL-READOUT
– This register is read only.
– The register range is from 0 up to 4095.
OFFSET CORRECTION
– The register range is from 0 to 31
– The MSB is set to activate the offset correction.
CURRENTSOURCE
– The register range is from 0 to 1023 and contains the settings for LOW CURRENT,
HIGH CURRENT, and SLEW RATE:
CURRENTSOURCE = SLEW RATE 256 + LOW CURRENT 8 + HIGH CURR ENT
SPECIAL CUSTOMER
– The register range is from 0 to 63 and contains the settings for OUTPUT BITTIME
and PARTNUMBER ENABLE:
SPECIAL CUSTOMER = PARTNUMBER ENABLE 16 + OUTPUT BITTIME
DEACTIVATE
– This register can only be written.
– The register has to be written with 2063 decimal (80F hexadecimal) for the deactivation.
– The sensor can be reset with an Activate pulse on the output pin or by switching off
and on the supply voltage.
74
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
6.3.6.
Programming Information
If the content of any register 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 command followed by sending a PROM command and a read command. The address
within the ERASE and PROM commands is not important. ERASE and PROM act on
all registers in parallel.
If all HAL855 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. It is recommended to use the programmer board version 5.1.
Note: For production and qualification tests, it is mandatory to set the Lock bit after
final adjustment and programming of HAL855. The Lock function is active after
the next power-up of 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.
Micronas
Sept. 19, 2013; APN000046_03EN
75
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
6.4.
Data Formats
The protocol between the programmer board and the Hall sensor defines fixed lengths
for the data, command, and address words to be transmitted:
– Command (CMD): 3 bit
– Address (ADR): 4 bit
– Data (DAT): 14 bit
– Command Parity (CP): 1 bit
– Address Parity (AP): 1 bit
– Data Parity (DP): 1 bit
Reminder: For communication with the programmer board, the 14 data bits are
encoded in four ASCII characters: DAT3, DAT2, DAT1, and DAT0.
As every register has a different length, not all of the 14 bits are used. Furthermore,
there is a difference between the write format (transfer Board IC) and the read format (transfer IC Board). Table 6–6 shows which of the 14 bits are valid for each register (write format and read format).
Table 6–6:
Data formats
Register
Char
DAT3
DAT2
DAT1
DAT0
Bit
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
PART NUMBER
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
SHIFT
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
SLOPE
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
MODE
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
DIGITAL OUTPUT
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
SPECIAL CUSTOMER
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
TC
Write
Read
(V)
V
V
V
V
V
V
(V)
V
V
V
V
V
V
TCSQ
Write
Read
V
V
V
V
V
V
V
V
V
V
DEACTIVATE
Write
1
0
0
0
0
0
0
0
1
1
1
1
CURVE LOW
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
CURVE HIGH
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
OFFSET CORRECTION
Write
Read
V
V
V
V
V
V
V
V
V
V
CURRENT SOURCE
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V: valid, (V): This bit must be ignored, : ignore, bit order: MSB first.
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Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
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 programmed is activated again by sending a pulse on the corresponding output line, followed by a dummy read command.
Note: The flow chart given in Fig. 6–6 is intended as a simple example. The multiprogramming loop can also be done within the calibration procedure.
Example:
BEGIN
INITIALIZE BOARD
STX j 2 ETX
STX z CHR$(85) ETX
STX n ETX
DELAY 20 ms
[Set Board Mode]
[Set Protocol Bittime]
[Switch Vdd on]
MULTIPROGRAMMING
FOR SENSOR = 1 TO 4:
STX w 3 1 f 0 0 8 0 f 0 ETX
DELAY 100 ms
STX h SENSOR CHR$(25) ETX
STX q 0 1 1 1 ETX
[Deactivate Sensors]
[Select SENSOR]
[Dummy Read]
CALIBRATE SENSOR
END MULTIPROGRAMMING LOOP
END
Fig. 6–6:
Micronas
General procedure
Sept. 19, 2013; APN000046_03EN
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HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
6.5.1.
The Programmable Output Characteristic
The output characteristic defines the shape of the sensor output signal. It consists of 32
setpoints. Each setpoint can be set to values between 0 and 511 LSB. The output characteristic has to be monotonic increasing (Setpoint0 < Setpoint1 < ... < Setpoint31)
An example of how the setpoints are programmed is given in Fig. 6–7.
Note: In case of a non-linear output characteristic, the parameters SHIFT and SLOPE
are related to the (virtual) straight line connecting the first and the last setpoints
(setpoint 0 and setpoint 31, respectively).
Example:
BEGIN
SETPOINT LOOP
FOR SETPOINT = 0 TO 15
CALCULATE SETPOINTS
DAT_LOW = HEX(SETPOINT x 16)
DAT_HIGH = HEX(SETPOINT x 16 + 256)
WRITE SETPOINTS
STX e 1 0 DAT_LOW DP ETX [Lower Part]
STX e 2 0 DAT_HIGH DP ETX [Higher Part]
END SETPOINT LOOP
END
Fig. 6–7:
78
Definition of the Output Characteristic “Linear (Standard)”
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Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
6.5.2.
The Calibration Procedure
The output characteristic is determined by the following parameters:
– Shift corresponds to the output voltage at an ADC value of zero.
– Slope corresponds to the increase of the output signal with magnetic field. A Slope
of “1” is equivalent to an output signal increase of 100% at an increase of 2048 of the
ADC value.
The HAL855 provides no ADC-Readout register. Therefore, the ADC value cannot be
read out. Instead, a digital readout DOUT is provided. The digital readout is captured at
the end of the signal processing.
The DOUT value can be used in the calibration process provided the register settings
are programmed to known initial settings. Hence, the calibration process must start
with a initialization of all relevant registers.
The calibration procedure is shown in Fig. 6–8. The register values are intended as an
example:
Step 1:
Programming of the parameters which do not require individual adjustment:
– Filter Frequency, Magnetic Range, Output Format, Output Period, TC, and TCSQ.
Step 2:
Initialize the registers SLOPE and SHIFT:
– The SHIFT register should be programmed to 50%.
– As the ADC value depends on the low pass filter frequency, it is recommended to
program the SLOPE register to the values listed in Table 6–7.
Table 6–7:
Initial SLOPE values
3 dB Filter Frequency
SLOPEINITIAL
80
0.2578
160
0.2578
500
0.1938
1000
0.1938
2000
0.3398
Step 3:
Get the digital readout value DOUT1 in the first calibration point and assign a nominal
output voltage (VOUT,1) to that point.
Step 4:
Get the digital readout value DOUT2 in the second calibration point and assign a nominal output voltage (VOUT,2) to that point.
Micronas
Sept. 19, 2013; APN000046_03EN
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APPLICATION NOTE
Programmer Board
Step 5:
Calculate and program the new values of Shift and Slope.
– The SHIFT register is calculated as:
100% 3968 – DOUT2 – 2048 3968
Shift = -------------- -----------------------------------------------------------------------------------
4096
DOUT2 – DOUT1
Shift
SHIFT = -------------- 1024
100%
– The SLOPE register is calculated as:
SlopeINITIAL
Slope = ---------------------------------------------------- 3968
DOUT2 – DOUT1
SLOPE = Slope 2048
80
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
BEGIN
WRITE COMMON REGISTER SETTINGS
READ DOUT 1
AT CALIBRATION POINT 1
STX e 3 1 5 0 0 0 8 0 0 ETX [Write Mode: 30 mT / 80 Hz /
Format PWM / Period 128 ms]
STX e 3 1 b 1 0 0 1 2 1 ETX [Write TC 18]
STX e 3 1 c 0 0 0 0 A 1 ETX [Write TCSQ 10]
STX q 0 1 7 1 ETX
READ DOUT 2
AT CALIBRATION POINT 2
STX q 0 1 7 1 ETX
INITIALIZE DSP FOR CALIBRATION
STX e 3 1 3 0 0 2 0 0 0 ETX [Write Shift 50 %]
STX e 3 1 4 1 0 2 1 0 1 ETX [Write Slope 0.2578, because
3 dB Filter Frequency = 80 Hz]
CALCULATE Sensitivity AND Voq
WRITE OUTPUT CHARACTERISTIC
LINEAR (STANDARD)
WRITE SHIFT AND SLOPE
STX e 3 1 3 0 DATA DP ETX [Write SHIFT]
STX e 3 1 4 1 DATA DP ETX [Write SLOPE]
STORE
STORE
END
Fig. 6–8:
Micronas
Calibration procedure
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HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
Step 6:
The “Store” sequence is given in Fig. 6–9. The permanent storing of data into the
EEPROM memory is a two-step process. First, all zero bits (ERASE), then all one bits
(PROM) are written.
BEGIN
SET PROGRAMMING PULSE WIDTH
STX u CHR$(100) ETX
[Pulse Width 100 ms]
SET DELAY OF ACKNOWLEDGE
STX y CHR$(18) ETX
ERASE - PROM - READ
STX c 5 1 3 0 4 0 3 0 6 1 0 0 ETX
[acts on all EEPROM registers]
END
Fig. 6–9:
82
Store sequence
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Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
7. Operation Mode 3
HAL856
This operation mode is set by sending the “j3” command.
Note: The HAL856 is a two-wire device. It is programmed by modulating the supply
voltage, and it responds by modulating its current consumption. In order to
detect the current levels of the sensor, the Hall Programmer Board V 5.1 measures the sensor’s supply current. Hence, only one HAL856 can be connected
to the board.
Communication:
PC prog. board
Section 7.1 and Section 7.2 contain a detailed description of communication between
the PC and the programmer board V 5.1. Particularly, all board commands available in
the operation mode “j3” are listed.
Communication:
prog. board sensor
The communication between the programmer board and the Hall sensor is described in
Section 7.3
Data formats
The data formats for communication between both the PC and the board, and the
board and the sensor are summarized in Section 7.4
Programming
procedure
Finally, Section 7.5 depicts the programming procedure and gives an example of a
complete programming sequence.
Micronas
Sept. 19, 2013; APN000046_03EN
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HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
7.1.
Definition of the Protocol
The general syntax is as follows (blanks are given for better readability only):
PC Board:
STX BCMD [CMD CP ADR AP] [DAT3 DAT2 DAT1 DAT0 DP] ETX
Board PC:
STX STATUS DAT3 DAT2 DAT1 DAT0 DP ETX
The characters in brackets [...] are optional, depending on the board command BCOM.
Table 7–1:
84
Description of the characters
Character
Description
STX
ASCII character 2
ETX
ASCII character 3
BCMD
Board command
CMD
Command
CP
Command parity
ADR
Address
AP
Address parity
DAT3
DAT2
DAT1
DAT0
Data characters, each encoding 4 bit in HEX format.
Example:
0 1 f 0 (HEX) = 496
DP
Data parity
STATUS
Status/error flag
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
7.2.
The Board Commands BCMD
The board commands activate functions of the firmware. The characters following the
BCMD are the parameters of this function. Some functions serve to control the board
operation and do not address the Hall device.
The read, write, program, and lock functions communicate with the Hall device. The
parameters of these functions are converted into a serial telegram and sent to the connected sensor.
Table 7–2:
Description of the board commands
BCMD
Parameters
Description
n
Switch VDD on
o
Switch VDD off
z[t]
t = 30...255 (as ASCII character)
Set bit time slow mode
bit time = t × 0.02 ms
default: t = 85 (HAL856)
default bit time = 1.7 ms (HAL856)
t = 30...255 (as ASCII character)
Set programming pulse width
width = t × 1.00 ms
HAL856: set t = 100
HAL856: set pulse width = 100 ms
t = 10...255
Delay Acknowledge
width = t × 64.0 µs
HAL856: set t = 11
HAL856 set width = 0.7 ms.
e[p]
p = CMD CP ADR AP DAT3 DAT2 DAT1 DAT0 DP
Write HAL and echo data to PC
q[p]
p = CMD CP ADR AP
Read HAL and echo data to PC
c[p]
p = CMD1 CP1 ADR1 AP1 CMD2 CP2 ADR2 AP2
CMD3 CP3 ADR3 AP3
Program HAL and echo answer to PC
k[p]
p = CMD1 CP1 ADR1 AP1 CMD2 CP2 ADR2 AP2
Program LOCK bit and echo answer to PC
u[t]
y[t]
i
Read Biphase M sequence
m[p]
p = 0 ... 7 (as HEX)
Read PWM sequence
p = PWM period (2p in ms).
v
Request firmware version
t
Request status and echo data to PC
j[p]
p = 0...3 (as HEX)
Switch board operation mode
0 = EMU Board V 4.1 (default)
1 = HAL805, HAL815, HAL817, HAL810,
HAL 82x, HAL83x, HAL 880, HAL1000 and
HAL1002
2 = HAL855
3 = HAL856
Micronas
Sept. 19, 2013; APN000046_03EN
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HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
Examples:
(Blanks are given for better readability only)
– set board operation mode:
STX j 3 ETX
– power on:
STX n ETX
– set bit time slow CHR$(85) = ’U’:
STX z U ETX
– read register no. 2:
STX q 0 1 2 1 ETX
– write register no. 2:
STX e 3 1 2 1 0 0 0 A 1 ETX
– write output characteristic setpoint 0:
STX e 1 0 0 0 0 0 0 0 1 ETX
– write output characteristic setpoint 16:
STX e 2 0 0 0 0 1 0 0 0 ETX
– read output characteristic setpoint 15:
STX e 6 1 f 0 ETX
– read output characteristic setpoint 31:
STX q 7 0 f 0 ETX
– store sequence:
STX u CHR$(100) ETX (set programming time)
STX y CHR$(11) ETX (set delay of Acknowledge)
STX c 5 1 3 0 4 0 3 0 6 1 0 0 ETX
(ERASE-PROM-READ)
– lock sensors
STX e 3 1 6 0 0 0 0 1 0 ETX (set Lock bit)
STX u CHR$(100) ETX (set programming time)
STX y CHR$(11) ETX (set delay of Acknowledge)
STX k 4 0 6 0 0 1 3 0 ETX (PROM-READ)
7.2.1.
Monitoring of the Supply Voltage
In case of ERASE, PROM, and LOCK, the supply voltage is measured by the board,
and a data string is sent back to the PC. The relation between the data and the supply
voltage is
DAT
V PROG = ------------ 6 2.485 V
4095
If the supply voltage is out of the specification limits, the status bit is set to “1”.
Examples:
– VPROG = 4.80 V, Data board PC:
STX 1 0 5 2 6 0 ETX
(DAT = 0 5 2 6)
– VPROG = 5.00 V, Data board PC:
STX 0 0 5 5 D 0 ETX
(DAT = 0 5 5 D)
86
Sept. 19, 2013; APN000046_03EN
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
7.3.
7.3.1.
Programming of the Sensor
Definition of Programming Pulses
The sensor is addressed by modulating a serial telegram on the supply voltage. The
sensor answers with a serial telegram on the output pin.
The bits in the serial telegram have a different bit time for the VDD-line and the output.
The bit time for the VDD-line is defined through the length of the Sync bit at the beginning of each telegram. The bit time for the output is defined through the Acknowledge
bit.
A logical “0” is coded as no voltage change within the bit time. A logical “1” is coded as
a voltage change between 50% and 80% of the bit time. After each bit, a voltage
change occurs.
7.3.2.
Definition of the Telegram
Each telegram starts with the Sync bit (logical 0), 3 bits for the Command (COM), the
Command Parity bit (CP), 4 bits for the Address (ADR), and the Address Parity bit (AP).
There are 4 kinds of telegrams:
Write a register
After the AP bit, follow 14 Data Bits (DAT) and the Data Parity bit (DP). If the telegram is
valid and the command has been processed, the sensor answers with an Acknowledge
bit (logical 0) on the output (see Fig. 7–2).
Read a register
After evaluating this command, the sensor answers with the Acknowledge bit, 14 Data
bits, and the Data Parity bit on the output (see Fig. 7–3).
Programming the
EEPROM cells
In order to permanently store the written data into the EEPROM cells, an erase and
program command have to be sent to the sensor. After the recognition of the erase and
program commands, the HAL856 answers with an acknowledge pulse on its output signal. After the acknowledge pulse, a pulse on the VDD-line is created to start the charging of the EEPROM cells. Then the supply voltage is kept constant during the charging
time. To stop the charging, a further command is sent to the HAL856. This stopping
command can be a further programming command or a read command (see Fig. 7–4).
Lock a sensor
To lock the EEPROM registers, the lock bit has to be programmed. Write the lock bit
into the lock register (see Fig. 7–2). If the telegram is valid and the command has been
processed, the sensor answers with an Acknowledge Bit (logical 0) on the output. In
order to store the lock bit permanently, an erase and program command have to be
sent to the sensor. This is the same procedure as mentioned above (see Programming
the EEPROM cells and Fig. 7–4. The EEPROM registers are locked after a power on
reset.
Micronas
Sept. 19, 2013; APN000046_03EN
87
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
tr
tf
IDDH
tp0
logical 0
tp0
or
IDDL
tp1
IDDH
tp0
logical 1
tp1
IDDL
Fig. 7–1:
Table 7–3:
tp0
or
Definition of logical 0 and 1 bit
Telegram parameters
Symbol
Parameter
Pin
Min.
Typ.
Max.
Unit
VDDL
Supply voltage for low level
during programming
1
5
5.6
6
V
VDDH
Supply voltage for high level
during programming
1
6.8
8.0
8.5
V
VDDPROG
Supply voltage for permanent
storing of the data
1
4.9
5.0
5.1
V
tr
Rise time
1
0.05
ms
tf
Fall time
1
0.05
ms
tp0
Bit time on VDD
1
1.7
1.75
1.8
ms
tp0 is defined through the Sync bit
tpOUT
Bit time on output pin
3
2
3
4
ms
tpOUT is defined through the
Acknowledge bit
tp1
Voltage change for logical 1
1, 3
50
65
80
%
% of tp0 or tpOUT
tPROG
Programming time for EEPROM
1
95
100
105
ms
trp
Rise time of charging pulse
1
0.2
0.5
1
ms
tfp
Fall time of charging pulse
1
0
1
ms
tw
Delay time of charging pulse after
Acknowledge
1
0.5
1
ms
88
0.7
Sept. 19, 2013; APN000046_03EN
Remarks
Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
WRITE
Sync
COM
CP
ADR
AP
DAT
DP
VDD
HAL855:
VOUT
HAL856:
IDD
Fig. 7–2:
Telegram for coding a Write command
READ
Sync
COM
CP
ADR
AP
VDD
HAL855:
VOUT
Acknowledge
DAT
DP
HAL856:
IDD
Fig. 7–3:
Micronas
Telegram for coding a Read command
Sept. 19, 2013; APN000046_03EN
89
APPLICATION NOTE
Micronas
STORE
Sync
COM1
CP1
ADR1
AP1
Sync
COM2
CP2
ADR2
AP2
Sync
COM3
CP3
ADR3
AP3
VDD
Acknowledge
HAL855:
VOUT
HAL856:
IDD
Acknowledge
DAT
DP
A
Start the Charge Pump
Stop the Charge Pump
VDD
Detail A
HAL855:
VOUT
HAL856:
IDD
Sept. 19, 2013; APN000046_03EN
2 x Delay Time
Fig. 7–4:
Programming Time
Telegram for programming the EEPROM
HAL8xy, HAL100x
Programmer Board
90
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
7.3.3.
Telegram Codes
Sync Bit
Each telegram starts with the Sync bit. This logical “0” pulse defines the exact timing for
tp0.
Command Bits (COM)
The Command code contains 3 bits and is a binary number. Table 7–4 shows the available commands and the corresponding codes for the HAL856.
Command Parity Bit
(CP)
This parity bit is “1” if the number of zeros within the 3 command bits is uneven. The
parity bit is “0”, if the number of zeros is even.
Address Bits (ADR)
The Address code contains 4 bits and is a binary number. Table 7–5 shows the available addresses for the HAL856 registers.
Address Parity Bit (AP)
This parity bit is “1” if the number of zeros within the 4 address bits is uneven. The parity bit is “0” if the number of zeros is even.
Data Bits (DAT)
The 14 Data bits contain the register information.
The registers use different number formats for the Data bits. These formats are
explained in Section 7.3.4
In the Write command, the last bits are valid. If, for example, the TC register (6 bits) is
written, only the last 6 bits are valid.
In the Read command, the first bits are valid. If, for example, the TC register (6 bits) is
read, only the first 6 bits are valid.
Data Parity Bit (DP)
This parity bit is “1” if the number of zeros within the binary number is even. The parity
bit is “0” if the number of zeros is uneven.
Acknowledge
After each telegram, the output answers with the Acknowledge signal. This logical “0”
pulse defines the exact timing for tpOUT.
Table 7–4:
Available commands
Command
Code
Explanation
READ
0
read a Setup EEPROM register (like TC, TCSQ, magnetic range, etc.)
READL
6
read a Characteristics EEPROM register (setpoints 0 to 15)
READH
7
read a Characteristics EEPROM register (setpoints 16 to 31)
WRITE
3
write a Setup EEPROM register (like TC, TCSQ, Magnetic range, etc.)
WRITEL
1
write a Characteristics EEPROM register (setpoints 0 to 15)
WRITEH
2
write a Characteristics EEPROM register (setpoints 16 to 31)
PROM
4
program all non-volatile registers
ERASE
5
erase all non-volatile registers
Please note: The Lock bit is set by using the WRITE command followed by a PROM.
Micronas
Sept. 19, 2013; APN000046_03EN
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HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
7.3.4.
Binary number:
Number Formats
The most significant bit is given as first, the least significant bit as last digit.
Example:
101001 represents 41 decimal.
Signed binary number:
The first digit represents the sign of the following binary number (1 for negative, 0 for
positive sign).
Example:
0101001 represents +41 decimal
1101001 represents 41 decimal
Two’s-complementary
number:
The first digit of positive numbers is “0”, the rest of the number is a binary number. Negative numbers start with “1”. In order to calculate the absolute value of the number, calculate the complement of the remaining digits and add “1”.
Example:
0101001 represents +41 decimal
1010111 represents 41 decimal
Table 7–5:
Available register addresses
Register
Code
Data
Bits
Format
Customer
Remark
CURRENTSOURCE
1
10
binary
read/write/program
Used to define output slew rate
and output current levels
(IDD_HIGH and IDD_LOW)
PARTNUMBER
2
11
binary
read/write/program
Only with BiPhase-M mode
SHIFT
3
11
two’s compl.
read/write/program
SLOPE
4
14
signed binary
read/write/program
MODE
5
14
binary
read/write/program
range, filter and output format
settings
LOCK
6
1
binary
write/program
lock bit
DIGITAL
READOUT
7
12
binary
read
digital value after signal
processing
OFFSET
CORRECTION
8
5
two’s compl.
(4 LSBs)
read/write/program
compensation of system offsets
SPECIALCUST.
9
6
binary
read/write/program
special customer register to
define Biphase-M bittime and
Partnumber Enable
TC
11
6
signed binary
(6 LSBs)
read/write/program
linear temperature coefficient
TCSQ
12
5
binary
read/write/program
quadratic temperature
coefficient
CURVE LOW
0...15
9
binary
write/read/program
setpoints 0 to 15
CURVE HIGH
0...15
9
binary
write/read/program
setpoints 16 to 31
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HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
7.3.5.
Register Information
Terminology
REGISTER: Name of the register or register value
Register: Name of the parameter
PARTNUMBER
– The register range is from 0 up to 2047.
SHIFT
– The register range is from 1024 up to 1023.
– The register value is calculated by:
Shift
SHIFT = -------------- 1024
100%
SLOPE
– The register range is from 8192 up to 8191.
– The register value is calculated by:
SLOPE = Slope 2048
TC and TCSQ
– The TC register range is from 31 up to 31.
– The TCSQ register range is from 0 up to 31.
Please refer to the data sheet for the recommended values.
Note: The word length of the TC register is 7 bit. The six LSBs represent a signed
binary number. The MSB has to be ignored.
MODE
– The register range is from 0 up to 16383 and contains the settings for PERIOD,
FORMAT, FILTER and RANGE:
MODE = PERIOD 512 + FORMAT 64 + FILTER 8 + RANGE
Please refer to the data sheet for the available PERIOD, FORMAT, FILTER and RANGE
values.
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APPLICATION NOTE
Programmer Board
DIGITAL-READOUT
– This register is read only.
– The register range is from 0up to 4095.
OFFSET CORRECTION
– The register range is from 0 to 31
– The MSB is set to activate the offset correction.
CURRENTSOURCE
– The register range is from 0 to 1023 and contains the settings for LOW CURRENT,
HIGH CURRENT, and SLEW RATE:
CURRENTSOURCE = SLEW RATE 256 + LOW CURRENT 8 + HIGH CURR ENT
SPECIAL CUSTOMER
– The register range is from 0 to 63 and contains the settings for OUTPUT BITTIME
and PARTNUMBER ENABLE:
SPECIAL CUSTOMER = PARTNUMBER ENABLE 16 + OUTPUT BITTIME
7.3.6.
Programming Information
If the content of any register 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 command followed by sending a PROM command and a read command. The address
within the ERASE and PROM commands is not important. ERASE and PROM act on
all registers in parallel.
If all HAL856 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. It is recommended to use the programmer board version 5.1.
Note: For production and qualification tests, it is mandatory to set the Lock bit after
final adjustment and programming of HAL856. The Lock function is active after
the next power-up of 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.
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HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
7.4.
Data Formats
The protocol between the programmer board and the Hall sensor defines fixed lengths
for the data, command, and address words to be transmitted:
– Command (CMD): 3 bit
– Address (ADR): 4 bit
– Data (DAT): 14 bit
– Command Parity (CP): 1 bit
– Address Parity (AP): 1 bit
– Data Parity (DP): 1 bit
Reminder: For communication with the programmer board, the 14 data bits are
encoded in four ASCII characters: DAT3, DAT2, DAT1, and DAT0.
As every register has a different length, not all of the 14 bits are used. Furthermore,
there is a difference between the write format (transfer board IC) and the read format
(transfer IC Board). Table 7–6 shows which of the 14 bits are valid for each register
(write format and read format).
Table 7–6:
Data formats
Register
Char
DAT3
DAT2
DAT1
DAT0
Bit
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
PART NUMBER
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
SHIFT
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
SLOPE
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
MODE
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
DIGITAL OUTPUT
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
SPECIAL CUSTOMER
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
TC
Write
Read
(V)
V
V
V
V
V
V
(V)
V
V
V
V
V
V
TCSQ
Write
Read
V
V
V
V
V
V
V
V
V
V
CURVE LOW
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
CURVE HIGH
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
OFFSET CORRECTION
Write
Read
V
V
V
V
V
V
V
V
V
V
CURRENT SOURCE
Write
Read
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V: valid, : ignore, bit order: MSB first, (V): This bit must be ignored.
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HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
7.5.
The Programming Procedure
The general programming procedure is described in detail for the HAL856.
An example for a programming procedure is given in Fig. 7–5.
First, the programmer board has to be initialized. Then, the sensor can be calibrated.
Please keep in mind that only one HAL856 can be connected to the board!
Example:
BEGIN
INITIALIZE BOARD
STX j 3 ETX
STX z CHR$(85) ETX
STX n ETX
DELAY 20 ms
[Set Board Mode]
[Set Protocol Bittime]
[Switch Vdd on]
CALIBRATE SENSOR
END
Fig. 7–5:
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HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
7.5.1.
The Programmable Output Characteristic
The HAL856 allows programming of a user-defined output characteristic by 32 setpoints.
Each setpoint corresponds to a defined output signal between 0% and 99.8%
The sequence of setpoints must be defined monotonously.
An example of how the setpoints are programmed is given in Fig. 7–6.
Note: In case of a non-linear output characteristic, the parameters SHIFT and SLOPE
are related to the (virtual) straight line connecting the first and the last setpoints
(setpoint 0 and setpoint 31, respectively).
Example:
BEGIN
SETPOINT LOOP
FOR SETPOINT = 0 TO 15
CALCULATE SETPOINTS
DAT_LOW = HEX(SETPOINT x 16)
DAT_HIGH = HEX(SETPOINT x 16 + 256)
WRITE SETPOINTS
STX e 1 0 DAT_LOW DP ETX [Lower Part]
STX e 2 0 DAT_HIGH DP ETX [Higher Part]
END SETPOINT LOOP
END
Fig. 7–6:
Micronas
Definition of the Output Characteristic “Linear (Standard)”
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HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
7.5.2.
The Calibration Procedure
The output characteristic is determined by the following parameters:
– Shift corresponds to the output voltage at an ADC value of zero.
– Slope corresponds to the increase of the output signal with magnetic field. A Slope
of “1” is equivalent to a output signal increase of 100% at an increase of 2048 of the
ADC value.
The HAL856 provides no ADC-Readout register. Therefore, the ADC value cannot be
read out. Instead, a digital readout DOUT is provided. The digital readout is captured at
the end of the signal processing.
The DOUT value can be used in the calibration process provided the register settings
are programmed to known initial settings. Hence, the calibration process must start
with a initialization of all relevant registers.
The calibration procedure is shown in Fig. 7–7. The register values are intended as
example:
Step 1:
Programming of the parameters which do not require individual adjustment:
– Filter Frequency, Magnetic Range, Output Format, Output Period, TC, and TCSQ.
Step 2:
Initialize the registers SLOPE and SHIFT:
– The SHIFT register should be programmed to 50%.
– As the ADC value depends on the low pass filter frequency, it is recommended to
program the SLOPE register to the values listed in Table 7–7.
Table 7–7:
Initial SLOPE values
3 dB Filter Frequency
SLOPEINITIAL
80
0.2578
160
0.2578
500
0.1938
1000
0.1938
2000
0.3398
Step 3:
Get the digital readout value DOUT1 in the first calibration point and assign a nominal
output voltage (VOUT,1) to that point.
Step 4:
Get the digital readout value DOUT2 in the second calibration point and assign a nominal output voltage (VOUT,2) to that point.
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HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
Step 5:
Calculate and program the new values of Shift and Slope.
– The SHIFT register is calculated as:
100% 3968 – DOUT2 – 2048 3968
Shift = -------------- -----------------------------------------------------------------------------------
4096
DOUT2 – DOUT1
Shift
SHIFT = -------------- 1024
100%
– The SLOPE register is calculated as:
SlopeINITIAL
Slope = ---------------------------------------------------- 3968
DOUT2 – DOUT1
SLOPE = Slope 2048
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HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
BEGIN
WRITE COMMON REGISTER SETTINGS
READ DOUT 1
AT CALIBRATION POINT 1
STX e 3 1 5 0 0 0 8 0 0 ETX [Write Mode: 30 mT / 80 Hz /
Format PWM / Period 128 ms]
STX e 3 1 b 1 0 0 1 2 1 ETX [Write TC 18]
STX e 3 1 c 0 0 0 0 A 1 ETX [Write TCSQ 10]
STX q 0 1 7 1 ETX
READ DOUT 2
AT CALIBRATION POINT 2
STX q 0 1 7 1 ETX
INITIALIZE DSP FOR CALIBRATION
STX e 3 1 3 0 0 2 0 0 0 ETX [Write Shift 50 %]
STX e 3 1 4 1 0 2 1 0 1 ETX [Write Slope 0.2578, because
3 dB Filter Frequency = 80 Hz]
CALCULATE Sensitivity AND Voq
WRITE OUTPUT CHARACTERISTIC
LINEAR (STANDARD)
WRITE SHIFT AND SLOPE
STX e 3 1 3 0 DATA DP ETX [Write SHIFT]
STX e 3 1 4 1 DATA DP ETX [Write SLOPE]
STORE
STORE
END
Fig. 7–7:
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Micronas
HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
Step 6:
The “Store” sequence is given in Fig. 7–8. The permanent storing of data into the
EEPROM memory is a two-step process. First, all zero bits (ERASE), then all one bits
(PROM) are written.
BEGIN
SET PROGRAMMING PULSE WIDTH
STX u CHR$(100) ETX
[Pulse Width 100 ms]
SET DELAY OF ACKNOWLEDGE
STX y CHR$(18) ETX
ERASE - PROM - READ
STX c 5 1 3 0 4 0 3 0 6 1 0 0 ETX
[acts on all EEPROM registers]
END
Fig. 7–8:
Micronas
Store sequence
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HAL8xy, HAL100x
APPLICATION NOTE
Programmer Board
8. Application Note History
1. Application Note Kits/Boards: “HAL8xx, HAL1000, HAL1500 Programmer Board”,
Aug. 12, 2004, 6251-632-1-1AK. First release of the application note kits/boards.
2. HAL8xy, HAL100x Programmer Board, May 14, 2009; APN000046_001EN. First
release of the application note. Major changes:
• Specification for HAL1500 removed
• Specification for HAL824, HAL825, and HAL880 added
• Section 3.4.1. Firmware Update added
• Section 4.3.6. Programming Information updated
• Section 5.3.7. Programming Information updated
• Section 6.3. Programming of the Sensor updated
• Section 6.4. Data Formats updated
• Section 7.3. Programming of the Sensor updated
• Section 7.4. Data Formats updated
• Section 8. Operation Mode 5 added
3. HAL8xy, HAL100x Programmer Board, April 21, 2010; APN000046_02EN. Second
release of the application note.
Major changes: Section 8. Operation Mode 5 removed
4. HAL8xy, HAL100x Programmer Board, Sept. 19, 2013; APN000046_03EN.
Third release of the application note.
Major changes:
• Sensor types HAL817, HAL83x and HAL1002 added
Micronas GmbH
Hans-Bunte-Strasse 19 D-79108 Freiburg P.O. Box 840 D-79008 Freiburg, Germany
Tel. +49-761-517-0 Fax +49-761-517-2174 E-mail: [email protected] Internet: www.micronas.com
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