WM8352
Production Data
The register control fields for Fast Charging are described in Table 106. See Section 17.7.5 for
details of battery charger termination.
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R25 (15h)
9
CHG_FAST_R
DY_EINT
0
Indicates that the charger is ready to go
into fast charge.
Interrupt Status
1
(Rising Edge triggered)
Note: This bit is cleared once read.
Enable fast charging.
R168 (A8h)
5
CHG_FAST
0
Battery charger
control 1
0 = Fast charging cannot take place.
1 = Enable fast charging (will not start
until valid charging conditions are met).
Note: This register is held low and can
only be written to once the fast charge
ready signal has gone high.
Protected by security key.
4
CHG_FAST_U
SB_THROTTL
E
0
Enable USB current throttling in fast
charge:
0 = Don't do any current throttling when
fast charging.
1 = Do current throttle while fast
charging.
Protected by security key.
Fast charge current limit setting.
0000 = off
R169 (A9h)
3:0
CHG_ISEL
[3:0]
0110
Battery charger
control 2
0001 = 50mA
0010 = 100mA
… (50mA steps)
1111 = 750mA
Note: Do not set the charger to be more
than 400mA when USB powered.
Protected by security key.
R170 (AAh)
6:5
CHG_THROTT
LE_T [1:0]
00
Time between steps when the charger
throttles back due to USB current limit.
Battery
Charger
Control 3
00 = 8us
01 = 16us
10 = 32us
11 = 128us
Protected by security key.
Table 106 Fast Charging Control
PD, February 2011, Rev 4.4
162
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
