AS3676 datasheet(16/92 Pages) AMSCO

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AS3676

Datasheet - D e ta i l e d D e s c r i p t i o n

8.2.6

Step up Registers

3. DCDC_FB can be used as a general purpose ADC input (see Analog-to-Digital Converter on page 65)

Table 10. Reg. control

Addr: 00

Reg. control

This register enables/disables the Charge Pump and the Step Up DC/DC

Converter.

Bit

Bit Name

Default Access

Description

step_up_on

0R/W

Enable the step up converter

Disable the Step Up DC/DC Converter

Enable the Step Up DC/DC Converter

Table 11. DCDC control1

Addr: 21h

DCDC control1

This register controls the Step Up DC/DC Converter.

Bit

Bit Name

Default Access

Description

step_up_frequ

R/W

Defines the clock frequency of the Step Up DC/DC

Converter.

01MHz

500kHz

2:1

step_up_fb

R/W

Controls the feedback source if step_up_fb_auto = 0

DCDC_FB enabled (external resistor divider).

Set step_up_fb=00 (DCDC_FB)

CURR1 feedback enabled (feedback via LEDs)

CURR2 feedback enabled (feedback via LEDs)

CURR6 feedback enabled (feedback via LEDs)

7:3

step_up_vtuning

00000

R/W

Defines the tuning current at pin DCDC_FB.

00000

0 µA

00001

1 µA

00010

2 µA

....

10000

15 µA

.....

11111

31 µA

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