HAL856 datasheet(39/42 Pages) MICRONAS

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DATA SHEET

HAL856

Micronas

March 23, 2010; DSH000142_002EN

5.4. Number Formats

Binary number:

The most significant bit is given as first, the least sig-

nificant 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

5.5. Register Information

CURRENTSOURCE

– The register range is from 0 to 1023 and contains

the settings for LOW CURRENT, HIGH CURRENT,

and SLEW RATE:

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:

SLOPE

– The register range is from

−8192 up to 8191.

– The register value is calculated by:

TC and TCSQ

– The TC register range is from

−31 up to 31.

– The TCSQ register range is from 0 up to 31.

Note: The word length TC register is 7 bit. The 6 LSBs

represent a signed binary number. The MSB

has to be ignored.

MODE

– The register range is from 0 up to 16383 and con-

tains the settings for PERIOD, FORMAT, FILTER,

and 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

SLEW RATE

128

LOW CURRENT

HIGH CURR ENT

SHIFT

Shift

100%

1024

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