CD1020 datasheet(4/61 Pages) NXP

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NXP Semiconductors

CD1020

22-channel multiple switch detection interface

4 Functional block diagram

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CD1020 Functional internal block diagram

Input power

VBATP

battery supply

VDDQ

logic supply

Bias and references

192 kHz

LPM oscillator

1.25 V internal bandgap

4.0 V SW detection reference

4.0 MHz

oscillator

Logic and control

WAKE_B I/O

SPI serial communication and registers

INT_B I/O

Switch status detection

SG0 - SG13

Selectable wetting current level

Pulse/continuous wetting current

SP0 - SP7

SPI communication/

switch status read

Programmable polling/

interrupt time

Switch to ground (SG)

only

Switch to ground (SG)

Switch to battery (SB)

14x switch to ground

8x programmable switch

Analog multiplexer (AMUX)

SPx/SGx inputs to AMUX

22 to 1 SPI AMUX select

Modes of operation

Normal mode

Low power mode

VBATP UV detect

SPI error detect

Fault detection and protection

Overtemperature

protection

HASH error detect

OV detection

Figure 1. Functional block diagram

CD1020

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Product data sheet

Rev. 5 — 20 August 2024

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