HAL880
DATA SHEET
5.4. Number Formats
Binary number:
VOQ
– The register range is from −1024 up to 1023.
– The register value is calculated by:
The most significant bit is given as first, the least sig-
nificant bit as last digit.
VOQ
----------
VOQ =
× 1024
VDD
Example: 101001 represents 41 decimal.
Signed binary number:
SENSITIVITY
The first digit represents the sign of the following
binary number (1 for negative, 0 for positive sign).
– The register range is from −8192 up to 8191.
– The register value is calculated by:
Example: 0101001 represents +41 decimal
1101001 represents −41 decimal
SENSITIVITY = Sensitivity × 2048
Two’s complementary number:
TC
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”.
– The TC register range is from 0 up to 1023.
– The register value is calculated by:
TC = GROUP × 256 + TCValue × 8 + TCSQValue
Example: 0101001 represents +41 decimal
1010111 represents −41 decimal
MODE
5.5. Register Information
– The register range is from 0 up to 255 and contains
the settings for FILTER and RANGE:
CLAMP-LOW
– The register range is from 0 up to 255.
– The register value is calculated by:
MODE = OUTPUTMODE × 32 + BITRATE × 16 +
FILTER × 8 + RANGE × 2 + EnableProgGPRegisters
LowClampingVoltage × 2
-------------------------------------------------------------
CLAMP-LOW =
× 255
D/A-READOUT
VDD
– This register is read only.
– The register range is from 0 up to 16383.
CLAMP-HIGH
– The register range is from 0 up to 511.
– The register value is calculated by:
DEACTIVATE
– This register can only be written.
– The register has to be written with 2063 decimal
(80F hexadecimal) for the deactivation.
HighClampingVoltage
-----------------------------------------------------
CLAMP-HIGH =
× 511
VDD
– The sensor can be reset with an Activate pulse on
the output pin or by switching off and on the supply
voltage.
30
Feb. 23, 2009; DSH000152_001EN
Micronas
MICRONAS [ MICRONAS ]
