PCA9420 datasheet(36/87 Pages) NXP

36 / 87 page

NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

9.5.13 Top level control_4 (TOP_CTL4, address 0Dh)

This register contains various configuration bits for top level related functions, part 4. This

is a WRITE ONLY register.

Bit

Symbol

Default value Type

Function

RSVD

00000

Reserved bit

WD_TIMER_CLR

[2:0]

000

Watchdog Timer Reset.

001: When written 001 to WD_TIMER_CLR [2:0], the watchdog timer

is reset.

All other values: when written to WD_TIMER_CLR [2:0], watchdog

timer remains unaffected.

Table 21. TOP_CNTL4 register bit description

9.5.14 Battery charger control_0 (CHG_CTL0, address 10h)

This register stores the linear battery charge related control registers, part 0. This is a

READ AND WRITE register.

Bit

Symbol

Default value Type

Function

CHG_LOCK

[4:0]

00000

R/W

Critical charger related setting lock.

CHG_LOCK [4:0] = 10101, these registers which are labeled as

“locked by CHG_LOCK” can be accessed to perform I2C “write”

command.

CHGN_LOCK [4:0] ≠ 10101, these registers which are labeled as

“locked by CHG_LOCK” can NOT be accessed to perform I2C “write”

command. In such case when “write” command is performed on these

locked registers, it will keep the present register value.

NTC_EN

R/W

Enable TS pin external thermistor (NTC) control in charger

0: Disable Thermistor (NTC) control in charger

1: Enable Thermistor (NTC) control in charger

CHG_TIMER_EN 1

R/W

Enable the fast charge timer and pre-qual timer

0: Disable both fast charge timer and pre-qual timer

1: Enable both fast charge timer and pre-qual timer

CHG_EN

R/W

Enable the linear battery charger

0: Disable charger

1: Enable charger

Note: The default value for this bit should be MTP programmable

Table 22. CHG_CNTL0 register bit description

9.5.15 Battery charger control_1 (CHG_CTL1, address 11h)

This register stores the linear battery charge related control registers, part 1.

This is a READ AND WRITE register,

and this register is locked by CHG_LOCK.

PCA9420

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

Product data sheet

Rev. 4.0 — 28 November 2022

36 / 87

PCA9420 Datasheet(PDF) 36 Page - NXP Semiconductors

PCA9420 Datasheet(HTML) 36 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