PCA9420BS datasheet(34/85 Pages) NXP

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NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

Bit

Symbol

Default

value

Type

Function

10: 3.3 V

11: 3.5 V

Table 18. TOP_CNTL1 register bit description...continued

9.5.11 Top level control_2 (TOP_CTL2, address 0Bh)

This register contains various configuration bits for top level related functions, part 2. This is a READ AND

WRITE register.

Bit

Symbol

Default value

Type

Function

ASYS_UVLO_SEL

[1:0]

R/W

Program a UVLO threshold on ASYS

00: 2.4 V

01: 2.5 V

10: 2.6 V

11: 2.7 V

RSVD

R/W

Reserved bit

THEM_SHDN

[2:0]

011

R/W

Program a thermal shutdown threshold, TSHDN, in

rising(hysteresis with 20°C)

000: 95 °C

001: 100 °C

010: 105 °C

011: 110 °C

100: 115 °C

101: 120 °C

110: 125 °C

111: reserved

DIE_TEMP_WARNING

[1:0]

R/W

Program a Die temperature warning threshold

00: 75 °C

01: 80 °C

10: 85 °C

11: 90 °C

Table 19. TOP_CNTL2 register bit description

9.5.12 Top level control_3 (TOP_CTL3, address 0Ch)

This register contains various configuration bits for top level related functions, part 3. This is a READ AND

WRITE register.

Bit

Symbol

Default value Type

Function

RSVD

R/W

Reserved bit

RSVD

R/W

Reserved bit

RSVD

R/W

Reserved bit

MODE1_I2C

R/W

MODE0_I2C

R/W

Depending on EN_MODE_SEL_BY_PIN_x (x=”0”, or “1”, or “2”, or “3”)

bit setting, the chip mode control is set by either the I2C bit MODE1_I2

C/ MODE0_I2C value, or the signal applied on external MODESEL1/

Table 20. TOP_CNTL3 register bit description

PCA9420

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Product data sheet

Rev. 4.2 — 26 July 2023

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