ZSC31015EIG1-R datasheet(38/53 Pages) RENESAS

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November 14, 2016

ZSC31015 Datasheet

3.6.2.1. Gain_B Interpretation

Gain_B should be interpreted as a number in the set [0, 64]. The MSB (bit 14) is a scaling bit that will multiply the

effect of the Gain_B[13:0] term by 8. The remaining bits Gain_B[13:0] represent a number in the range of [0,8)

with Gain_B[13] having a weighting of 4, and each subsequent bit has a weighting of ½ the previous bit.

Table 3.7

Gain_B [13:0] Weightings

Bit Position

Weighting

2 = 4

1 = 2

0 = 1

-1

…

-8

-9

-10

-11

Examples:

The binary number: 010010100110001B = 4.6489; Gain_B[14] is 0BIN, so the number represented by

Gain_B[13:0] is not multiplied by 8.

The binary number: 101100010010110B = 24.586; Gain_B[14] is 1BIN, so the number represented by

Gain_B[13:0] is multiplied by 8.

3.6.2.2. Offset_B Interpretation

Offset_B is a 14-bit unsigned binary number. The MSB has a weighting of 8192. The following bits then have a

weighting of: 4096, 2048, 1024 …

Table 3.8

Offset_B Weightings

Bit Position

Weighting

8192

4096

2048

1 = 2

0 = 1

For example, the binary number 1111 1111 1100 = 4092.

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