DA6021 datasheet(133/225 Pages) RENESAS

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DA6021

HIGHLY INTEGRATED POWER MANAGEMENT IC FOR

INTEL® ATOM™ Z3000 PROCESSOR

Company Confidential

Data Sheet

Version 3.A - Final

31-Jan-14

133 of 224

www.dialog-semiconductor.com

It is assumed that DA6021 is in SOC_G3 and VSYS is valid. Such wake-up event will be generated even if the

system is in SOC_S4, SOC_S3 and SOC_SX. Wake-up is completely under the control of the processor.

A power button event is forwarded to the SOC via the DA6021 PWRBTN_B output pin and SOC will take the

action. In case of an event other than the power button an interrupt towards the SoC will be generated.

Following the wake-up signal generation in SOC_G3:

Power Source Detection Logic detects an event (power button or power source insertion)

ADC is triggered to measure VBAT

ADC will provide the measurement result is available

Power Source detection Logic compares the measurement result with the programmed LOWBAT value,

according to the available source

Issue a wake-up event notifying the wake-up source

This will be done only if in SOC_G3 and there is no need to measure the VBUS and DCIN. In case of USB

insertion and the battery measurement gives as result battery low Power Source Detection Logic will trigger the

ADC every 4 second. As this is not critical time an error of 100ms is tolerated.

DA6021 Catastrophic and Critical Events

14.8

There are 9

“catastrophic and critical events” which may force an immediate Cold Off, i.e. force an immediate

hardware-controlled VR shutdown, or simply alert the SOC. Four of these events

– BCU VCRIT, BATRM,

System TEMP and battery TEMP

– may have configurable action, programmed via the I2C register map. These

events are split into two ca

tegories: “Catastrophic” and “Critical”

Catastrophic events are:



THERMTRIP_B - The SOC asserts THERMTRIP_B in response to an SOC over-temperature condition.

DA6021 asserts SDWN_B immediately. After 90us, shuts down all VRs.



PMICTEMP

– DA6021 detects a critical over-temperature condition on its internal die sensor and asserts

SDWN_B immediately. After 90us, shuts down all VRs.



System TEMP

– DA6021 detects a critical over-temperature condition on an external system thermistor.

If programmed DA6021 asserts SDWN_B immediately. After 90us, shuts down all VRs.



Battery TEMP

– DA6021 detects a critical over-temperature condition on an external battery thermistor.

If programmed DA6021 asserts SDWN_B immediately. After 90us, shuts down all VRs.



VSYSUVP

– DA6021 detects VSYS “undervoltage” (VSYS ≤ 2.7V) by VSYS under voltage hard-coded

comparator for more than 100µs.DA6021 asserts SDWN_B immediately. After 90us, shuts down all

VRs.



VSYSOVP

– DA6021 detects VSYS “overvoltage” (VSYS ≥ 5.4V min) by VSYS over voltage hard-coded

comparator for more than 100µs.DA6021 asserts SDWN_B together with shutting down all VRs

immediately.



VBATRM

– DA6021 detects that a battery was removed from the system by VBAT comparator when the

bit BATRMSRC in the PSDETCTRL register is cleared (=0). If BATRMPDEN is set (=1), DA6021 asserts

SDWN_B immediately. After 90us, shut down all VRs. If BATRMPDEN is cleared, DA6021 operates

without detecting a valid battery is present ONLY if an AC/DC adapter (SDCINDET_B=1), therefore no

Cold Off in this case. Instead, an interrupt is sent to the SOC (assuming unmasked, via the normal

behavior of the SBATDET bit). However, even if BATRMPDEN is cleared, a Cold Off will still be

executed if no AC/DC adapter is detected (SDCINDET_B=0).

DA6021 Datasheet(PDF) 133 Page - Renesas Technology Corp

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