PCA9420BS datasheet(28/85 Pages) NXP

28 / 85 page

NXP Semiconductors

PCA9420

Power management IC for low-power microcontroller applications

9.5.3 Sub level interrupt_0 (SUB_INT0, address 02h)

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

contains system level related interrupt events. Any of the interrupt sources of this register trigger the SYS_INT

bit on the TOP_INT register as long as they are unmasked on the Sub_INT0_Mask register.

This is WRITE AND CLEAR register.

Bit

Symbol

Default value Type

Function

RSVD

W/C

Reserved bit

RSVD

W/C

Reserved bit

ON_PUSH_INT

W/C

ON falling edge longer than 5 ms happened

TEMP_

PREWARNING

W/C

Die temperature pre-warning interrupt

1: die temp ≥ TWARNING

0: die temp < TWARNING. TWARNING threshold is configured by T_

WARNING [1:0]

THEM_SHDN

W/C

Thermal shutdown interrupt

0: thermal shutdown is not triggered

1: die temp ≥ TSHDN (set in THEM_SHDN [2:0], thermal shutdown is

triggered

ASYS_

PREWARNING

W/C

ASYS Pre-Warning Voltage Interrupt

0: ASYS voltage does NOT fall below the threshold set in ASYS_

PREWARNING [1:0]

1: ASYS voltage falls below the threshold set in ASYS_PREWARNING

[1:0]

WD_TIMER

W/C

Watchdog Timer Expiration Interrupt

0: The watchdog timer expiration has not happened since the last time

this bit was cleared.

1: The watchdog timer expiration has happened since the last time this

bit was cleared.

IN_PWR

W/C

Input Voltage Interrupt

0: The IN_PWR bit has not changed since the last time this bit was

cleared.

1: The IN_PWR bit has changed since the last time this bit was

cleared.

Table 11. Sub_INT0 register bit description

9.5.4 Sub level interrupt_0 mask (Sub_INT0_Mask, address 03h)

This is a READ AND WRITE register.

Bit

Symbol

Default

value

Type

Function

RSVD

R/W

Reserved bit

RSVD

R/W

Reserved bit

ON_PUSH_INT_MASK

R/W

ON Key falling interrupt mask bit

0: Not Masked

1: Masked

Table 12. Sub_INT0_Mask bit description

PCA9420

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

Product data sheet

Rev. 4.2 — 26 July 2023

28 / 85

PCA9420BS Datasheet(PDF) 28 Page - NXP Semiconductors

PCA9420BS Datasheet(HTML) 28 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

Datasheet Download

Link URL