CD1020 datasheet(39/56 Pages) NXP

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NXP Semiconductors

CD1020

7.10.12 Low-power mode configuration

The device has poll[3-0] to set the normal polling rate for the IC. The polling rate is the time between polling events. The current sources

become active at this time for a time of tACTIVESGPOLLING or tACTIVESBPOLLING for SG or SB channels respectively.

Table 23. Low-power mode configuration register

R/W

SPI data bits [23 – 0]

[31–25]

[24]

bit 23

bit 22

bit 21

bit 20

bit 19

bit 18

bit 17

bit 16

0001_111

0/1

Unused

Default on POR

000

0000

bit 15

bit 14

bit 13

bit 12

bit 11

bit 10

bit 9

bit 8

Unused

000

0000

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

bit 1

bit 0

Unused

poll3

poll2

poll1

poll0

000

0111

MISO return word

bit [23]

bit [22]

bits [21 – 0]

0001_111[R/W]

FAULT

STATUS

INTflg

Table 24. Low-power mode configuration bits definition

Bit

Functions

Default value

Description

23 – 4

Unused

3 – 0

poll[3–0]

1111

Set the polling rate for switch detection

• 0000 – 3.0 ms

• 0001 – 6.0 ms

• 0010 – 12 ms

• 0011 – 24 ms

• 0100 – 48 ms

• 0101 – 68 ms

• 0110 – 76 ms

• 0111 – 128 ms

• 1000 – 32 ms

• 1001 – 36 ms

• 1010 – 40 ms

• 1011 – 44 ms

• 1100 – 52 ms

• 1101 – 56 ms

• 1110 – 60 ms

• 1111 – 64 ms (default)

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