MC13883_10 Datasheet, PDF (46/64 Pages) Freescale Semiconductor, Inc – Integrated Charger USB Interface

Connectivity
5.4 Interrupt
The MC13883 IC has interrupt generation capability. The following signals can generate an interrupt via
the MC13883 INT line:
• VBUS detector:
— VBUS_DET_4V4
— VBUS_DET_2V
— VBUS_DET_0V8
• Charge detector (CHRGDET_INT)
• ID detector
— ID_FLOAT
— ID_GND
• SE1 Detector (SE1_DET_INT)
• Battery Voltage Regulator (CC_CV_INT)
• Charge Current Monitor (CHRG_CURR_INT)
• Reverse Over-current Protection Circuit (RVRS_MODE_INT)
• Carkit Interrupt Detector output (CK_DET_INT)
• Reverse Mode Charge Detect (RVRS_CHRG_INT)
• Over-voltage Protection Circuit (VBUSOV_INT)
Each of these interrupts can be independently masked. Even when the interrupt is masked, the interrupt
source can still be read from the Interrupt Status Register. Each interrupt is latched so that even if the
interrupt source becomes inactive, the interrupt remains active. Each interrupt can be cleared by writing a
1 to the appropriate bit in the Interrupt Status Register.
The CHRGDET_INT, VBUS_3V4_INT, VBUSDET_INT, ID_INT, SE1_DET_INT, and CC_CV_INT
interrupts are dual-edge triggered. The CHRG_CURR_INT, RVRS_MODE_INT, and CK_DET_INT
interrupts are single-edge triggered.
All interrupts are summarized in Table 41.
Table 41. MC13883 Interrupts^A
Name
CHRGDET _INT
VBUS_3V4_INT
Trigger
dual-edge
Debounce
32 ms on rising and falling edge
Description
Logic high indicates that the interrupt is from a low
to high or a high to low transition of CHRGDET
comparator. Used to detect insertion or removal of
a self powered device.
Write a "1" to this location to clear the interrupt.
Logic high indicates that the interrupt is from a low
to high or a high to low transition of the 3.4V VBUS
comparator output. Used to detect insertion or
removal of a Self Powered Device.
Write a “1” to this location to clear the interrupt.
MC13883 Technical Data, Rev. 3
46
Freescale Semiconductor