AS3665 datasheet(31/78 Pages) AMSCO

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AS3665

Datasheet, Confidential - D e ta i l e d D e s c r i p t i o n C h a r g e P u m p

The operating modes are controlled according to the following tables:

Table 37. CP_Control Register

Addr: 05h

CP_Control Register

Bit

Bit Name

Default Access

Description

1:0

cp_mode

00b

R/W

Operating mode of charge pump (in manual mode sets the

operating mode, in automatic mode reports the mode)

1:1 mode

1:1.5 mode

1:2 mode

reserved - don’t use

3:2

cp_mode_switching

00b

R/W

Mode switching control

1:1, 1:1.5 automatically up and down switching

1:1, 1:1.5 automatically up switching

1:1, 1:1.5, 1:2 automatically up switching

Manual mode switching; mode defined by cp_mode

cp_auto_on

R/W

Automatically switch on the charge pump if required

Charge pump should be enabled by cp_on

CP is automatically enabled if a current source is

enabled

1. Exception: LED7...LED9 if connected to VBAT. Defined by register LED7_on_cp, LED8_on_cp and

LED9_on_cp.

cp_on

R/W

Automatically switch on the charge pump if required

The charge pump stays in 1:1 mode

(unless cp_auto_on is set)

Enable manual or automatic mode switching

7:6

cp_down_hyst

00b

R/W

Control the hysteresis for down switching

from 1:1.5 to 1:1 mode

default hysteresis

default-75mV hysteresis

default-150mV hysteresis

default-225mV hysteresis

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