PCA9420 datasheet(50/87 Pages) NXP

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NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

Bit

Symbol

Default value Type

Function

WD_TIMER_0

[1:0]

R/W

Watchdog timer setting in mode setting 0:

00: Watchdog Timer Disabled

01: Watchdog Timer = 16 s

10: Watchdog Timer = 32 s

11: Watchdog Timer = 64 s

[2-bit MTP to set default value]

LDO2_OUT_0_

OFFSET

R/W

LDO2 output voltage offset selection in mode setting 0:

0: LDO2 Output Voltage = LDO2_OUT_0_LSB[4:0] + 0 V

1: LDO2 Output Voltage = LDO2_OUT_0_LSB[4:0] + 1.2 V

[1-bit MTP to set default value]

LDO2_OUT_0_

LSB

[4:0]

11001

R/W

LDO2 default output voltage for mode setting 0 (see below).

Note: The default value for LDO2_OUT_0_LSB [4:0] is set at 3.3 V,

but it should be MTP programmable.

Table 50. MODECFG_0_3 register bit description

00000=1.500 V

01001=1.725 V

10010=1.950 V

00001=1.525 V

01010=1.750 V

10011=1.975 V

00010=1.550 V

01011=1.775 V

10100=2.000 V

00011=1.575 V

01100=1.800 V

10101=2.025 V

00100=1.600 V

01101=1.825 V

10110=2.050 V

00101=1.625 V

01110=1.850 V

10111=2.075 V

00110=1.650 V

01111=1.875 V

11000=2.100 V

00111=1.675 V

10000=1.900 V

11001-11111=2.1 V

(default)

01000=1.700 V

10001=1.925 V

Table 51. LDO2 default output voltage for mode setting 0

9.5.32 Mode configuration mode setting 1_0 (MODECFG_1_0, address 26h)

This register contains mode setting 1, part 0 configuration register. This is a READ AND

WRITE register.

Bit

Symbol

Default value Type

Function

SHIP_EN_1

R/W

Ship mode enable/disable in mode setting 1

0: Device is NOT set in ship mode

1: Device is set in ship mode

Table 52. MODECFG_1_0 register bit description

PCA9420

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Product data sheet

Rev. 4.0 — 28 November 2022

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