PCA9420 datasheet(51/87 Pages) NXP

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NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

Bit

Symbol

Default value Type

Function

EN_MODE_

SEL_BY_PIN_1

R/W

MODESEL0/MODESEL1 Control Selection in mode setting 1:

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_1

[5:0]

011100

R/W

SW1 output voltage for mode setting 1 (see below).

Table 52. MODECFG_1_0 register bit description...continued

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

000011=0.575 V

010001=0.925 V

011111=1.275 V

000100=0.600 V

010010=0.950 V

100000=1.300 V

000101=0.625 V

010011=0.975 V

100001=1.325 V

000110=0.650 V

010100=1.000 V

100010=1.350 V

000111=0.675 V

010101=1.025 V

100011=1.375 V

001000=0.700 V

010110=1.050 V

100100=1.400 V

001001=0.725 V

010111=1.075 V

100101=1.425 V

001010=0.750 V

011000=1.100 V

100110=1.450 V

001011=0.775 V

011001=1.125 V

100111=1.475 V

001100=0.800 V

011010=1.150 V

101000=1.500 V

001101=0.825 V

011011=1.175 V

101001 to 111110 = 1.5 V

111111 = 1.8 V

Table 53. SW1 output voltage for Mode Setting 1

9.5.33 Mode configuration mode setting 1_1 (MODECFG_1_1, address 27h)

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

WRITE register.

Bit

Symbol

Default value Type

Function

RSVD

R/W

Reserved bit

Table 54. MODECFG_1_1 register bit description

PCA9420

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Product data sheet

Rev. 4.0 — 28 November 2022

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