WM8351CGEB/RV WOLFSON [Wolfson Microelectronics plc], WM8351CGEB/RV Datasheet - Page 166

• Manufacturer Part Number: WM8351CGEB/RV
• Manufacturer: WOLFSON [Wolfson Microelectronics plc]

WM8351
w
The battery charger can raise a first-level interrupt, CHG_INT (see Section 24) to report status and
fault conditions to the host processor. The CHG_INT interrupt is the logical OR of all the second-level
interrupts described in Table 111.
Note: If a battery is connected to the BATT pin, but the WM8351 is being powered from the Wall or
USB
CHG_VBATT_LT_3P1_EINT and CHG_VBATT_LT_2P85_EINT interrupts to be set.
The CHG_VBATT_LT_3P1_EINT and CHG_VBATT_LT_2P85_EINT interrupts can be masked by
setting the associated mask bits defined in Table 111.
Alternatively, the EXT_USB_FB_EINT and/or EXT_WALL_FB_EINT interrupts (see Section 17.5) can
be used to validate the Battery Undervoltage interrupts - if one of the External Feedback interrupts is
set at the same time as the Battery Undervoltage interrupts, then the Battery Undervoltage interrupts
should be ignored.
R25 (19h)
Interrupt
Status 1
R33 (21h)
Interrupt
Status 1 mask
Table 111 Battery Charger Interrupts
17.7.8
ADDRESS
supplies,
INTERRUPTS AND FAULT PROTECTION
then
15:0
BIT
15
14
13
12
11
10
9
2
1
0
disconnection
CHG_BATT_HOT_EINT
CHG_BATT_COLD_EINT
CHG_BATT_FAIL_EINT
CHG_TO_EINT
CHG_END_EINT
CHG_START_EINT
CHG_FAST_RDY_EINT
CHG_VBATT_LT_3P9_EINT
CHG_VBATT_LT_3P1_EINT
CHG_VBATT_LT_2P85_EINT
“IM_” + name of respective bit
in R25 (19h)
LABEL
of
the
Wall
or
(Rising Edge triggered)
Note: This bit is cleared once read.
(Rising Edge triggered)
Note: This bit is cleared once read.
(Rising Edge triggered)
Note: This bit is cleared once read.
(Rising Edge triggered)
Note: This bit is cleared once read.
(Rising Edge triggered)
Note: This bit is cleared once read.
(Rising Edge triggered)
Note: This bit is cleared once read.
into fast charge.
(Rising Edge triggered)
Note: This bit is cleared once read.
(Rising Edge triggered)
Note: This bit is cleared once read.
(Rising Edge triggered)
Note: This bit is cleared once read.
Battery voltage < 2.85 interrupt.
(Rising Edge triggered)
Note: This bit is cleared once read.
Mask bits for battery charger interrupts
Each of these bits masks the respective
bit in R25 when it is set to 1 (e.g.
CHG_FAST_RDY in R25 does not trigger
a CHG_INT interrupt when
IM_CHG_FAST_RDY in R33 is set).
Battery temp too hot.
Battery temp too cold.
Battery fail.
Charger timeout.
Charging final stage.
Charging started.
Indicates that the charger is ready to go
Battery Voltage < 3.9 interrupt.
Battery voltage < 3.1 interrupt.
USB
supply
DESCRIPTION
PD, April 2012, Rev 4.5
will
Production Data
cause
166
the