PCA9421 datasheet(39/66 Pages) NXP

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NXP Semiconductors

PCA9421

Power management IC for low-power microcontroller applications

Bit

Symbol

Default value Type

Function

Table 48. MODECFG_2_3 register bit description...continued

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

(default)

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

01000=1.700 V

10001=1.925 V

Table 49. LDO2 default output voltage for mode setting 2

9.5.30 Mode configuration mode setting 3_0 (MODECFG_3_0, address 2Eh)

This register contains mode setting 3, part 0 configuration register. This is a READ AND WRITE register.

Bit

Symbol

Default value Type

Function

RSVD

R/W

Reserved bit

EN_MODE_

SEL_BY_PIN_3

R/W

MODESEL0/MODESEL1 Control Selection in mode setting 3

0: mode control by internal I2C register bits, MODE0_I2C and/or

MODE1_I2C only; signal applied on external MODESEL0/MODESEL1

pins is ignored.

1: mode control by signal applied on external MODESEL0 and/or

MODESEL1 pins only, not by internal I2C register bits, MODE0_I2C

and MODE1_I2C

SW1_OUT_3

[5:0]

011100

R/W

SW1 output voltage for mode setting 3 (see below).

Table 50. MODECFG_3_0 register bit description

000000=0.500 V

001110=0.850 V

011100=1.200 V

(default)

000001=0.525 V

001111=0.875 V

011101=1.225 V

000010=0.550 V

010000=0.900 V

011110=1.250 V

Table 51. SW1 output voltage for mode setting 3

PCA9421

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Product data sheet

Rev. 1.0 — 16 October 2023

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