PCA9420 datasheet(35/87 Pages) NXP

35 / 87 page

NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

Bit

Symbol

Default value

Type

Function

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...continued

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_

I2C/ MODE0_I2C value, or the signal applied on external MODESEL1/

MODESEL1 pins. Refer to EN_MODE_SEL_BY_PIN description for

more details.

With EN_MODE_SEL_BY_PIN=0, the mode selection is determined

by the following:

[MODE1_I2C: MODE0_I2C] = 00, mode 0 setting

[MODE1_I2C: MODE0_I2C] = 01, mode 1 setting

[MODE1_I2C: MODE0_I2C] = 10, mode 2 setting

[MODE1_I2C: MODE0_I2C] = 11, mode 3 setting

SW_RST

W/C

Chip software reset bit. If user write “1” to this bit, it will reset all other

I2C register bit to its default setting and cycle the regulator outputs,

and meanwhile, this bit will be clear and reset back to “0” as well.

ON_GLT_LONG

[1:0]

R/W

Program a long glitch timer on ON key

00: 4 s

01: 8 s

10: 12 s

11: 16 s

Note: 2-bit MTP should be reserved to change the default setting

Table 20. TOP_CNTL3 register bit description

PCA9420

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 4.0 — 28 November 2022

35 / 87

PCA9420 Datasheet(PDF) 35 Page - NXP Semiconductors

PCA9420 Datasheet(HTML) 35 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87

Datasheet Download

Link URL