AS3665
Datasheet, Confidential - D e t a 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
Operating mode of charge pump (in manual mode sets the
operating mode, in automatic mode reports the mode)
00
1:1 mode
1:0
cp_mode
00b
R/W
01
1:1.5 mode
10
11
00
1:2 mode
reserved - don’t use
Mode switching control
1:1, 1:1.5 automatically up and down switching
3:2
cp_mode_switching
00b
R/W
01
1:1, 1:1.5 automatically up switching
10
11
1:1, 1:1.5, 1:2 automatically up switching
Manual mode switching; mode defined by cp_mode
Automatically switch on the charge pump if required
enabled
4
cp_auto_on
1b
R/W
0
1
Charge pump should be enabled by cp_on
CP is automatically enabled if a current source is
1
Automatically switch on the charge pump if required
5
cp_on
0b
R/W
0
The charge pump stays in 1:1 mode
(unless cp_auto_on is set)
1
00
Enable manual or automatic mode switching
Control the hysteresis for down switching
from 1:1.5 to 1:1 mode
default hysteresis
7:6
cp_down_hyst
00b
R/W
01
default-75mV hysteresis
10
11
default-150mV hysteresis
default-225mV hysteresis
1. Exception: LED7...LED9 if connected to VBAT. Defined by register LED7_on_cp , LED8_on_cp and
LED9_on_cp .
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