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Those caveats in mind: LDO mode, the voltage is set by the [6: So the OS needs to know when a clash is detected, immediately: However it is also possible to run the DM bus at a reduced 8-bit width with a slightly different pin arrangement for the top 8 bit pins: The actual charge current is equal datashret the desired current; 1: Content is available under Creative Commons Attribution unless otherwise noted. V HTF-discharge Battery discharge high temperature threshold settings 8.

Depending on the firmware, some 3G USB-based Modems offer multiple endpoints, some of which can transfer audio data.

AXP Datasheet, PDF – Alldatasheet

GPIO output high 3. GPIO0 feature set 8. TS pin current output settings PEK key parameter settings 8.

This module, it seems, is actually designed for use as a stand-alone, fully-functioning actual phone, not even requiring a companion SoC or MCU at all. The VC can do up to VGA 30fps, and can take still pictures up to 3M-pixels so is not exactly the fastest bunny on the block, but it has the distinct advantage of not requiring an NDA to gain access to either the datasheet or the app notes, and it is so commonly available that approaching the manufacturer is not actually necessary: Time however is running out for this chip because Qualcomm subequently bought Atheros, and Qualcomm replaced the entire management with people who completely fail to comprehend what made the AR so very successful.


Connectivity for this particular 3G Modem is as follows, which will give the minimum functionality: For an example implementation of this techique see https: It’s not that simple: Quite a lot of IRQ and communication lines: LDO3 output voltage setting Bit6-Bit0 0.

This comes to a total of 22 GPIO lines, which is a significant amount. The battery state of existence indicates 0: Not blowing up devices by getting into a current bun-fight over who is going to supply 5.

Power input status 8. It’s crude but effective: DC-DC mode selection 8. If they don’t, they’re best avoided: Battery charging in activation mode.

X-Powers Tech AXP – PDF Datasheet – PMIC – Battery Management In Stock |

Power output control 8. Some PMICs may be re-programmed manually at the factory i. DCin, battery and OTG “Charging” is a three-way power-routing problem that, ax209 to the amounts of current involved, and the possibility of blowing up lithium cells and causing people’s houses to catch fire, is somthing that has to be taken very very seriously.


Coulomb Counter Control 8.

(PDF) AXP209 Datasheet download

Many “Arduino-style” amateur-deployed level shifting techniques are in fact Open-Drain style and really do not work properly as they rely on the internal capacitance of pins and tracks to drop ax209 Ground levels: Power operating mode and charge status indication 8.

DC-DC operating frequency is set 8. All in all it’s quite a sophisticated and clever circuit.

GPIO1 feature set 8. It requires the following signals:.

AXP209 Datasheet PDF

These voltages are typically hard-wired into the PMIC’s firmware. It requires the following signals: The Application Notes are significant which makes it an datasehet good choice. Close VBUS discharge resistor; 1: To clear this interrupt, write a 1 into bit 7 of 0x DC-DC2 voltage rate control 1: In battery activate mode, the charger always inputs relatively low current to batteries.

LDO3 voltage rate control 1: Note the inclusion of ESD protection which needs to be very close to the SD card slot and the 47k pull-up resistors.

When an interrupt is fired and the interrupt line is pulled low, bit 7 of 0x48 will be set to 1. On when ADC enabled So typically for each sensor, two extra GPIO lines are required: