CD1020 datasheet(39/61 Pages) NXP

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NXP Semiconductors

CD1020

22-channel multiple switch detection interface

8.10.25 Interrupt request

The MCU may request an Interrupt pulse of duration 100 μs by sending the Interrupt request command. After

an Interrupt request command, the CD1020 returns the Interrupt request command word, as well as the Fault

status and INTflg bits set if a fault/interrupt event occurred. Sending an interrupt request command does not set

the INTflg bit itself.

SPI data bits [23 – 0]

[31–25]

[24]

bits [23 – 16]

0100_011

0000_0000

bits [15 – 8]

0000_0000

bits [7 – 0]

0000_0000

MISO return word

bit [23]

bit [22]

bits [21–0]

0100_0111

FAULT STATUS

INTflg

Table 36. Interrupt request command

8.10.26 Reset register

Writing to this register causes all of the SPI registers to reset.

SPI data bits [23 – 0]

[31–25]

[24]

bits [23 – 16]

0100_100

0000_0000

bits [15 – 8]

0000_0000

bits [7 – 0]

0000_0000

MISO return word

bit [23]

bit [22]

bits [21–0]

0011_1110

FAULT STATUS

INTflg

Switch Status

Table 37. Reset command

CD1020

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Product data sheet

Rev. 5 — 20 August 2024

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