AS3525 datasheet(157/194 Pages) AMSCO

157 / 194 page

AS3525-A/-B C22O22

Data Sheet, Confidential

www.austriamicrosystems.com

Revision 1.13

157

- 194

7.4.18

Interrupt Generation

7.4.18.1 General

All interrupt sources can get enabled or disabled by corresponding bits in the 3 IRQ-bytes. By default no IRQ source is enabled.

The IRQ output can get configured to be PUSH/PULL or OPEN_DRAIN and ACTIVE_HIGH or ACTIVE LOW with 2 bits in IRQ_ENRD_2 register

(0x27). Default state is open drain and active_low.

7.4.18.2 IRQ Source Interpretation

There are 3 different modules to process interrupt sources:

7.4.18.3 LEVEL

The IRQ output is kept active as long as the interrupt source is present and this IRQ-Bit is enabled

7.4.18.4 EDGE

The IRQ gets active with a high going edge of this source. The IRQ stays active until the corresponding IRQ-Register gets read.

7.4.18.5 STATUS CHANGE

The IRQ gets active when the source-state changes. The change bit and the status can be read to notice which interrupt was the source. The IRQ

stays active until the corresponding interrupt register gets read.

7.4.18.6 De-bouncer

There is a de-bounc function implemented for USB and CHARGER. Since these 2 signals can be unstable for the phase of plug-in or unplug, a de-

bounce time of 512ms/256ms/128ms can be selected by 2 bits in the IRQ_ENRD2 register (0x27h).

Table 145 First Interrupt Register

Name

Base

Default

IRQ_ENRD_0

I2C audio master

0x00

First Interrupt Register

Offset: 0x25

Please be aware that writing to this register will enable/disable the corresponding

interrupts, while with reading you get the actual interrupt status and will clear the

settings. This register is reset at a DVDD-POR.

Bit

Bit Name

Default

Access

Bit Description

battery over-temperature interrupt setting

0: disable

1: enable

The interrupt must not be enabled if the charger block and

battery temperature supervision is disabled

CHG_tmphigh

(level)

Battery over-temperature interrupt reading

0: battery temperature below 55°C

1: battery temperature was too high and the charger was

turned off. The charger will be turned on again, when the

temperature gets below 50°C

Battery end of charge interrupt setting

0: disable

1: enable

The interrupt must not be enabled if the charger block is

disabled

CHG_endofch

(edge)

Battery end of charge interrupt reading

0: battery charging in progress

1: charging is complete, turn charger off

To check end of charge again the charger has to be turned on.

CHG_status

0: no charger input source connected

1: charger input source connected, also valid if charger is

connected during wakeup

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