AS3658F-BCTP datasheet(122/158 Pages) AMSCO

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AS3658

Data Sheet Confidential - Deta il ed Descri ption - System Functi ons

6:3

reset_reason

Flags to indicate to the software the reason for the last

reset

0000

VPOR has been reached (battery or charger

insertion from scratch)

0001

VRESETFALLING was reached (battery voltage

drop below 2.75V)

0010

software forced by force_reset

0011

software forced by power_off and XON was

pulled low

0100

software forced by power_off and charger was

detected

0101

external triggered through the pin RESET

0110

reset caused by overtemperature T140

0111

reset caused by watchdog

1000

reset caused by 5 seconds on press

1001

reset caused by rtc_alarm register

1010

reset caused by rtc repeated wakeup

1011

reset caused by interrupt in standby mode

1100

reset caused by XON pulled low in standby

mode

Onkey_reset_5s

R/W

Reset after 5 seconds ON pressed disabled

Reset after 5 seconds ON pressed enabled

Table 127. Internal references Bit definitions

Addr:59

Internal references Bit definitions

These bits control the internal reference mode and internal clk

frequency

Bit

Bit Name

Default

Access

Description

standby_mode_on

Setting to ‘1’ sets the AS3658 into standby mode. All

regulators defined in reg.17h “Reg Power1Ctrl” and

reg.1Eh “Reg Power2 Ctrl are disabled except those

regulators enabled by reg.81h “Reg standby mode”.

XRESET will be pulled to low. A normal startup of all

regulators will be done with any interrupt (has to be

enabled before entering standby mode). During this

startup, regulators defined by Reg standby mode

Clk_div2

R/W

Divide internal clock oscillator by 2 to reduce

quiescent current for low power operation

Normal mode

Internal clock frequency divided by two. All

timings are increased by two. Switching

frequency of all DCDC converters are divided

by two. Reduced transient performance of

DCDC converters.

Table 126. Reset Control Register

Addr:105

Reset Control

These bits control the power off mode and reset timer

Bit

Bit Name

Default

Access

Description

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