AS3658F-BCTP datasheet(26/158 Pages) AMSCO

26 / 158 page

Table 12.

stpup1_det and stpup1_oc Bit definitions

Addr: 53

Low voltage status bit definitions

This register shows the status of the overcurrent protection of the

stepup1dcdc

Bit

Bit Name

Default Access

Description

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Revision 1v13

25 - 157

AS3658

Data Sheet Confidential - Detail ed Descri ption-Power Management Functions

8.2

Current Sinks

These are general-purpose current sinks intended to control the backlight(s), buzzer and vibrator. The low voltage

current sink has an integrated protection against over voltage and can therefore also drive inductive loads (VPROTECT).

DCDC_CURR1 and DCDC_CURR2, DCDC_CURR3 are high voltage (15V) current sinks, e.g. for series of white

LEDs

CURR1_GPIO, CURR2_GPIO, CURR3_GPIO, CURR4_GPIO are four 5V, 38.25mA current sinks, e.g. for buzzer,

vibrator, LEDs

CURR1_GPIO, CURR2_GPIO, CURR3_GPIO, CURR4_GPIO can be used as general propose Input/Output (GPIO)

functions optional (described in section General Purpose Input / Output (CURR1_GPIO1 … CURR4_GPIO4)).

stpup2_prot

00h

DCDC converter 2 overvoltage protection to prevent

damage of external NFET, if DCDC_CURR1 or

DCDC_CURR2 or DCDC_CURR3 feedback selected, and

no LED string connected:

Overvoltage protection disabled

Switch off DCDC step up 2 if the voltage on

DCDC_FB2 exceeds 1.25V

stpup1_oc

Step up overcurrent status bit

VRsense < VOVCURRENT

VRsense > VOVCURRENT for more than 5 msec (latched

state)

stpup1_det

Step up detection status register

VRsense < VDETECT for more than 1msecond, and

DCDC Step up converter is in Pulseskip for more than

1 millisecond

VRsense > VDETECT for more than 1msecond, or the

DCDC Step up converter is not in Pulseskip for more

than 1 millisecond

Table 11. Step Up DC/DC Bit definitions

Addr: 34

Step Up2 DC/DC control

This register controls the different modes of the step up2 DCDC

converter

Bit

Bit Name

Default Access

Description

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