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LP3910 Datasheet(PDF) 39 Page - Texas Instruments |
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LP3910 Datasheet(HTML) 39 Page - Texas Instruments |
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39 / 72 page  CHG_IN power detected USB Power detected USB Power removed Battery Low Thermal alarm ADC conversion completed IMR IRQ IRQB Interrupt sources Charger safety timer timeout Interrupt Pending register int1 int2 int3 int4 int5 int6 int7 int0 CHG_IN power removed LP3910 www.ti.com SNVS481M – NOVEMBER 2006 – REVISED DECEMBER 2015 As new interrupts can occur while the I2C read cycle is clearing the IRQ register, a buffer register called interrupt pending register (IPR), not accessible through the I2C-compatible interface holds the next interrupts. De- asserting the IRQB output is immediately followed by a new transition of IRQB to logic low when an interrupt is pending. The Interrupts are not hardware prioritized. It is up to the firmware to determine the priority in case more than one interrupt request is set. Figure 61. Interrupt Request Setting 8.3.6.1 Interrupts and Standby Mode Interrupts are captured in standby mode and can be serviced when the system processor is enabled when the LP3910 is in an active state. 8.3.6.2 Interrupt Sources • CHG_IN Power Detected and CHG_IN Disconnect (INT0 and INT1): An interrupt (INT0) is generated when CHG_IN power is connected to the LP3910. Another interrupt (INT1) is generated upon CHG_IN power removal. • USB Power Detected and USB Disconnect (INT2 and INT3): An interrupt (INT2) is generated when USB power is connected to the LP3910. Another interrupt (INT3) is generated upon disconnecting the USB power. • Battery Low (INT4): When the battery voltage drops below the battery low threshold IRQ, an interrupt is generated. This allows the processor to perform some routine tasks prior to going to standby mode. • Thermal Alarm (INT5): If the junction temperature of the LP3910 exceeds 115°C, an interrupt is generated. • ADC Conversion Done (INT6): The ADC generates an interrupt request upon the completion of a data conversion. • Charger Timer Interrupt (INT7): A charger timeout occurs 10 hours after it started (see Li-Ion Linear Charger) and subsequently requests an interrupt. Copyright © 2006–2015, Texas Instruments Incorporated Submit Documentation Feedback 39 Product Folder Links: LP3910 |
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