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WM8352 bảng dữ liệu(PDF) 164 Page - Wolfson Microelectronics plc

tên linh kiện WM8352
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WM8352
Production Data
w
PD, February 2011, Rev 4.4
164
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
R169 (A9h)
Battery charger
control 2
11:8
CHG_TIME
[3:0]
1011
Writing to his field set the charge timeout
duration:
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
R169 (A9h)
Battery charger
control 2
13:12
CHG_STS [1:0]
00
Charger status:
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
CH_IND ACTION
Charger current set to zero
LED off
Trickle charging
LED blinks slowly (0.5Hz)
Fast charging
LED blink s quickly (1Hz)
Table 109 Battery Charger Status via CH_IND



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