WM8352
Production Data
DESCRIPTION
ADDRESS
BIT
11:8
LABEL
DEFAULT
R169 (A9h)
CHG_TIME
[3:0]
1011
Writing to his field set the charge timeout
duration:
Battery charger
control 2
0000 = 60min
0001 = 90min
0010 = 120min
0011 = 150min
0100 = 180min
0101 = 210min
0110 = 240min
0111 = 270min
1000 = 300min
1001 = 330min
1010 = 360min
1011 = 390min
1100 = 420min
1101 = 450min
1110 = 480min
1111 = 510min
Reading from this field indicates the
charge time remaining:
Time remaining = CHG_TIME * 2048s
Protected by security key.
Table 107 Battery Charger Termination
17.7.6 BATTERY CHARGER STATUS
The status of the Battery Charger can be read from the CHG_STS register field, as described in
Table 108. This field indicates whether the charger is active in trickle or fast charge modes.
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
Charger status:
R169 (A9h)
13:12
CHG_STS [1:0]
00
Battery charger
control 2
00 = Charger off, current set to 0.
01 = In trickle charge mode.
10 = In fast charge mode.
11 - Reserved
Table 108 Battery Charger Status
In addition to the CHG_STS register readback, the charger status can be indicated on an LED
connected to a GPIO pin configured as CH_IND (see Section 20). The CH_IND function is an open-
drain LED output that provides a visible indication of the charger status.
CHARGER STATUS
Charger current set to zero
Trickle charging
CH_IND ACTION
LED off
LED blinks slowly (0.5Hz)
LED blink s quickly (1Hz)
Fast charging
Table 109 Battery Charger Status via CH_IND
PD, February 2011, Rev 4.4
164
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
