PCA9420BS datasheet(29/85 Pages) NXP

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NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

Bit

Symbol

Default

value

Type

Function

TEMP_PREWARNING_MASK

R/W

Die temp pre-warning interrupt mask bit

0: Not Masked

1: Masked

THEM_SHDN_MASK

R/W

Thermal shutdown interrupt mask bit

0: Not Masked

1: Masked

ASYS_PREWARNING_MASK

R/W

ASYS Pre-Warning Voltage Interrupt Mask bit

0: Not Masked

1: Masked

WD_TIMER_MASK

R/W

Watchdog Timer Expiration Interrupt Mask bit

0: Not Masked

1: Masked

IN_PWR_MASK

R/W

Input Voltage Interrupt Mask bit

0: Not Masked

1: Masked

Table 12. Sub_INT0_Mask bit description...continued

9.5.5 Sub level interrupt_1 (Sub_INT1, address 04h)

The sub-level interrupt register contains flags indicating the second-tier interrupt event. For this register,

it contains battery charger related interrupt events. Any of the interrupt sources of this register trigger the

CHG_INT bit on the TOP_INT register as long as they are unmasked on the Sub_INT1_Mask register.

This is WRITE AND CLEAR register.

Bit

Symbol

Default value Type

Function

RSVD

W/C

Reserved bit

ICHG_DEAD_TIMER_INT

W/C

Dead charge timer expiration Interrupt

0: The dead charge timer expiration has not happened

since last time this bit was cleared

1: The dead charge timer expiration has happened since

last time this bit was cleared

For more details, see Figure 10

VIN_ILIM

W/C

Input Current Limit Interrupt

0: no Input current limit has been triggered since the last

time this bit is cleared;

1: input current limit event is triggered since last time this bit

is cleared.

ICHG_FAST_TIMER

W/C

Fast Charging Timer Expiration Interrupt

0: The fast charging timer expiration has not happened

since the last time this bit was cleared.

1: The fast charging timer expiration has happened since

the last time this bit was cleared.

ICHG_PREQ_TIMER

W/C

Pre-qualification Charging Timer Expiration Interrupt

0: The pre-qual charging timer expiration has not happened

since the last time this bit was cleared.

Table 13. Sub_INT1 register bit description

PCA9420

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

Product data sheet

Rev. 4.2 — 26 July 2023

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