AS3715 datasheet(118/159 Pages) AMSOSRAM

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ams Datasheet

Page 117

[v1-03] 2015-Aug-10

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AS3715 − Register Description

Figure 135:

WatchdogSoftwareSignal

Figure 136:

Stepup_control2

Addr:48h

WatchdogSoftwareSignal

Bit

Bit Name

Default

Access

Bit Description

7:6

pwm_div

b00

This bit defines the divider ratio of the prescaler for the

PWM generator

0 : Divide by 1

1 : Divide by 2

2 : Divide by 4

3 : Divide by 16

wtdg_sw_sig

PUSH

Trigger input by the serial interface, if GPIO1..4_iosf<>9

Addr:51h

Stepup_control2

Bit

Bit Name

Default

Access

Bit Description

7:3

stepup2_v

b00000

Defines the tuning current at FB_SU pin

0 : 0 uA

1 : 1 uA

... : ...

31 : 31 uA

stepup2_res

Gain selection for SU2

0 : If DCDC is used with current feedback

(CURR1,CURR2,CURR3) or if FB_SU is used with current

feedback only (Only R1,C1 connected)

1 : If FB_SU is used with external resistor divider (2

resistors)

1stepup2_freq

Selects Stepup2 frequency

0 : 1 MHz

1 : 0.5 MHz

stepup2_on

ON/OFF control of SU2

0 : OFF

1 : ON

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