AXP209
From linux-sunxi.org
The AXP209 is the PMU (Power Management Unit) used by A10, A13 and A20 SoCs and developed by X-Powers, a sister company of Allwinner.
GPIO
The AXP209 has 4 GPIOs which can be addressed from fex files as port:powerN (N in [0..3]).
Spec Sheets
File:AXP209 Datasheet v1.0 cn.pdf
File:AXP209 Datasheet v1.0en.pdf
File:AXP202 Datasheet v1.0 en.pdf
The correct address for AXP209 on A20 is 0x34
Overview
AXP209 is designed to be a highly-integrated power system management IC that is optimized for applications requiring single-cell Li-battery (Li-Ion/Polymer) and multiple output DC-DC converters.
AXP209 integrates
- an adaptive USB-Compatible PWM charger
- 2-way step-down converter (Buck DC-DC converter)
- 5-channel linear regulator device (LDO) voltage / current / temperature multi-channel 12-Bit ADC
- 4 configurable GPIO. Sustaining Card power system security the stable
- AXP209 integrated over / under voltage (OVP / UVP), over temperature (OTP), overcurrent protection (OCP) circuit.
Package
AXP209 6mm x 6mm 48-pin QFN package.
Features
- Automatic gapless power source change (IPS - Intelligent Power Select)
- Voltage range: 2.9 V - 6.3V (AMR:-0.3V-11V)
- Configurable high efficient IPS system
- Adjustable USB or AC-adapter current limit (4.4V/900mA/500mA/100mA)
- Battery Power Path resistance less than 75mΩ
- Fully integrated PWM Charger
- Maximum charging current of up to 1.8A
- Full support USB charging
- Battary voltage range: 4.1V/4.15V/4.2V/4.36V
- Battery temperature monitoring
- Automatic charging process control
- Support charger LED
- Automatically adjust charge current according to system load
- Backup battery
- Support backup battery (can be used for RTC module)
- Support for backup battery, charging current can be set
- 2 synchronous buck DC-DC converters
- DC-DC2: can be adjusted between 0.7-2.275V 25mV/step, drive capability 1.6A support VRC
- DC-DC3: can be adjusted between 0.7-3.5V, 25mV/step, drive capacity 1.2A
- 5 low drop-out linear regulators
- LDO1: Always-on 30mA
- LDO2: Low noise with voltage from 1.8V to 3.3V adjustable 100mV/step, drive capability 200mA
- LDO3: 0.7-3 .5 V adjustable, 25mV/step, Drive capacity 200mA
- LDO4: low noise LDO, 1.8V-3.3V adjustable 100mV/step, drive capability of 200mA
- LDO5: low-noise LDO, 1.8-3.3V adjustable 100mV/step, drive capability 50mA
- Timer (Timer)
- 7bit Timer, Timing Range 1127 minutes
- Timer outputs interrupts
- Signal acquisition system
- Built-in 12 Bit ADC, 12-way for current and voltage control with two additional external signal input
- Built-in Fuelgauge system
- Provides information, such as power consumption (mA or mW), the remaining battery capacity (% or mAh), the state of charge (%) and the remaining time for battery to charge
- Two-level low-power warning and protection
- Internal temperature sensor
- Application Processor Interface (Host Interface)
- TWSI (I2C) interface for data exchange
- IRQs and Sleep Managment
- Built-in GPIO
- Built-in configurable timer
- Provide 12 registers for data storage during system power-off
- System Management
- Soft reset and hard reset support
- Soft and hard power shutdown support
- Support for external wake source
- Support the output voltage monitoring, self-diagnostic function
- Output PWROK, indicating system reset or shutdown instructions
- External power detection (insert / remove / drive capacity)
- Supports soft power-on for input & output
- Over/Under-voltage protection (OVP / UVP)
- Overcurrent protection (OCP)
- Overtemperature protection (OTP)
- Support OTG VBUS power state setting / monitoring
- Highly integrated
- Internal precision reference voltage (0.5%)
- Built-in MOSFET
- timing and the output voltage can be customized
- Decryption module
- 128bit OTP password storage
- dynamic real-time decryption algorithm
Pin Description
| Num | Name | Type | Condition | Function Description |
|---|---|---|---|---|
| 1 | SDA | IO | Data pin for serial interface, normally connect a 2.2K resistor to 3.3V I/O power | |
| 2 | SCK | I | Clock pin for serial interface, normally connect a 2.2K resistor to 3.3V I/O power | |
| 3 | GPIO3 | IO | REG9EH[7] | GPIO 3 |
| 4 | N_OE | I | Power output on/off switch
GND: on IPSOUT: off | |
| 5 | GPIO2 | IO | REG92H[2:0] | GPIO 2 |
| 6 | N_VBUSEN | I | VBUS to IPSOUT Selection
GND:IPSOUT select VBUS High:IPSOUT do not select VBUS | |
| 7 | VIN2 | PI | DCDC2 input source | |
| 8 | LX2 | IO | Inductor Pin for DCDC2 | |
| 9 | PGND2 | G | NMOS Ground for DCDC2 | |
| 10 | DCDC2 | I | DC-DC2 feedback pin | |
| 11 | LDO4 | O | Output Pin of LDO4 | |
| 12 | LDO2 | O | Output Pin of LDO2 | |
| 13 | LDO24IN | PI | Input to LDO2 and LDO4 | |
| 14 | VIN3 | PI | DCDC3 input source | |
| 15 | LX3 | IO | Inductor Pin for DCDC3 | |
| 16 | PGND3 | G | NMOS GND for DCDC3 | |
| 17 | DCDC3 | I | Feed back to DCDC3 | |
| 18 | GPIO1 | IO | REG93H[2:0] | GPIO 1
ADC Input |
| 19 | GPIO0 | IO | REG90H[2:0] | GPIO 0
Low noise LDO/Switch ADC Input |
| 20 | EXTEN | O | External Power Enable | |
| 21 | APS | PI | Internal Power Input | |
| 22 | AGND | G | Analog Ground | |
| 23 | BIAS | IO | External 200Kohm 1% resistor | |
| 24 | VREF | O | Internal reference voltage | |
| 25 | PWROK | O | Power Good Indication Output | |
| 26 | VINT | PO | Internal logic power, 2.5V | |
| 27 | LDO1SET | I | It set the LDO1 default voltage. | |
| 28 | LDO1 | O | LDO1 output，for Host RTC block | |
| 29 | DC3SET | I | It set the DCDC3 default voltage | |
| 30 | BACKUP | IO | Backup battery pin | |
| 31 | VBUS | PI | USB VBUS input | |
| 32, 33 | ACIN | PI | Adapter input | |
| 34, 35 | IPSOUT | IO | Main Battery | |
| 36 | CHGLED | O | charger status indication | |
| 37 | TS | I | Battery Temperature sensor input or an external ADC input | |
| 38, 39 | BAT | PO | System power source | |
| 40 | LDO3IN | O | LDO3 input source | |
| 41 | LDO3 | I | Output Pin of LDO3 | |
| 42 | BATSENSE | I | Current sense port1 | |
| 43 | CHSENSE | O | Current sense port2 | |
| 44 | VIN1 | PI | DCDC1 input source | |
| 45 | LX1 | IO | Inductor Pin for DCDC1 | |
| 46 | PGND1 | G | NMOS Ground for DCDC1 | |
| 47 | PWRON | I | Power On-Off key input，Internal 100k pull high to APS | |
| 48 | IRQ/WAKEUP | IO | IRQ output or wakeup | |
| 49 | EP | G | Exposed Pad, need to connect to system ground |
Registers Description
REG 00H: Power input status
Bit Description R/W 7 Indicates ACIN presence 0: ACIN does not exist; 1: ACIN present
R 6 Instructions the ACIN whether available R 5 VBUS is present indication 0: VBUS does not exist; 1: VBUS exist
R 4 Indicate the VBUS whether available R 3 The directions VBUS access before use is greater than VHOLD R 2 Indicates that the battery current direction 0: battery discharge; 1: The battery is charged
R 1 Indicate whether ACIN and VBUS input is shorted on the PCB R 0 The instructions start ACIN source is or VBUS 0: Start source non-ACIN / VBUS is;: Start source ACIN / VBUS R
REG 01H: Power operating mode and charge status indication
Bit Description R/W 7 Indicating AXP209 whether over-temperature 0: not too warm; 1: overtemperature
R 6 Charging indicator 0: not charging or charging has been completed; 1: Charging
R 5 The battery state of existence indicates 0: no battery connected to AXP209; 1: the battery has been connected to the AXP209
R 4 Reservations, can not be changed R 3 Indicates whether the battery into the active mode 0: not to enter the the battery activation patterns; 1: has entered the battery activation mode
R 2 Indicate the charging current is less than the desired current 0: The actual charge current is equal to the desired current; 1: the actual charge current is less than the desired current
R 1-0 Reservations, can not be changed R
REG 02H: USB OTG VBUS status indication
Bit Description R/W 7-3 Reservations, can not be changed 2 Indicate the VBUS whether effective, effective R 1 The directions VBUS Session A / B is effective, and 1 indicates that a valid R 0 Indicative Session End state 1 indicates R
REG 04-0FH: Data cache
Note: As long as the external power supply, battery or battery backup certain power exists, this data will be kept, not affected by the switch machine.
REG 12H: Power output control
- Default value: XXH
Bit Description R/W Default Value 7 Reservations, can not be changed RW X
6 LDO3 switch control 0: off; 1: open
RW X 5 Reservations, can not be changed RW X 4 DC-DC2 switch control RW X 3 LDO4 switch control RW X 2 LDO2 switch control RW X 1 DC-DC3 switch control RW X 0 The EXTEN switch control 0: off; 1: open
RW X
REG 23H: DC-DC2 output voltage setting
- Default value: XXH
Bit Description R/W Default Value 7-6 Reservations, can not be changed 5-0 DC-DC2 output voltage setting 0.7-2.275V, 25mV/step Vout = [0.7 + (Bit5-0) * 0.025] V
RW X
REG 25H: DC-DC2/LDO3 dynamic voltage scaling parameter settings
- Default value: 00H
Bit Description R/W Default Value 7-4 Reservations, can not be changed 3 LDO3 VRC enable control 0: open; 1: Close
RW 0 2 DC-DC2 VRC enable control 0: open; 1: Close
RW 0 1 LDO3 VRC control the slope of the voltage rise 0: 25mV/15.625us = 1.6mV/us 1: 25mV/31.250us = 0.8mV/us
RW 0 0 DC-DC2 VRC control the slope of the voltage rise 0: 25mV/15.625us = 1.6mV/us 1: 25mV/31.250us = 0.8mV/us
RW 0
REG 27H: DC-DC3 output voltage setting
- Default value: XXH
Bit Description R/W Default Value 7 Reservations, can not be changed 6-0 DC-DC3 output voltage setting 0.7-3.5V, 25mV/step Vout = [0.7 + (Bit6-0) * 0.025] V
RW X
REG 28H: LDO2 / 4 output voltage settings
- Default value: XXH
Bit Description R/W Default Value 7-4 LDO2 output voltage settings 1.8-3.3V, 100mV/step Vout = [1.8 + (Bit7-4) * 0.1] V
RW X 3-0 LDO4 output voltage settings 1.25 1.3 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.5 2.7 2.8 3.0 3.1 3.2 3.3
RW X
REG 29H: LDO3 output voltage settings
- Default value: XXH
Bit Description R/W Default Value 7 LDO3 mode select: 0: LDO mode, the voltage is set by the [6:0] 1: switch-mode voltage is decided by LDO3IN
RW 0 6-0 LDO3 output voltage setting Bit6-Bit0 0.7-2.275V, 25mV/step Vout = [0.7 + (Bit6-0) * 0.025] V
RW X
REG 30H: VBUS-IPSOUT channel management
- Default value: 6XH
Bit Description R/W Default Value 7 VBUS available when the VBUS-IPSOUT pathway selection control signal 0: N_VBUSEN pin, to decide whether to open this path 1: VBUS-IPSOUT path select Open, regardless N_VBUSEN state
RW 0 6 VBUS V HOLD Pressure limiting control 0: not limited pressure; 1: limited pressure
RW 1 5-3 V HOLD Set up V HOLD = [4.0 + (Bit5-3) * 0.1] V
RW 100 2 Reservations, can not be changed 1-0 VBUS current limit control open time limit stream selection 00:900 mA; 01:500 mA; 10:100 mA; 11: not limit
RW 0
REG 31H: VOFF - Shutdown voltage setting
- Default value: X3H of
Bit Description R/W Default Value 7-4 Reservations, can not be changed 3 Sleep mode the PEK or GPIO edge the wakeup enable set: 0: off 1: Open After writing this bit automatically cleared each into Sleep mode again write 1
2-0 VOFF Set up VOFF= [2.6 + (Bit2-0) * 0.1] V Default: 2.9V RW 011
REG 32H: Shutdown settings, battery detection and CHGLED pins control
- Default value: 46H
Bit Description R/W Default Value 7 Shutdown control This bit write output closes AXP209
RW 0 6 Battery monitoring function set bit: 0: off; 1: Open RW 1 5-4 CHGLED pin functions set 00: Hi-Z 01: 25% 1Hz blinking 10: 25% 4Hz blinking 11: output low
RW 00 3 CHGLED pin control set 0: control by charging function 1: REG 32H [5:4] control by the register
RW 0 2 Output Close timing control 0: Close 1: Contrary to start timing
RW 0 1-0 Shutdown delay N_OE AXP209 from low to high Delay time 00: 128mS; 01: 1S; 10: 2S; 11: 3S
RW 10
REG 33H: Charge control
- Default value: CXH
Bit Description R/W Default Value 7 Charging functions enable control bit 0: Off, 1: open
RW 1 6-5 Charging the target voltage set 00:4.1 V; 01:4.15 V; 10:4.2 V; 11:4.36 V
RW 10 4 Charging the end of the current set 0: The charging current is less than 10% of the set value, end-of-charge 1: The charging current is less than 15% of the set value, end-of-charge
RW 0 3-0 Charging current is set Icharge= [300 + (Bit3-0) * 100] mA
RW X
REG 34H: Charge control
- Default value: 45H
Bit Description R/W Default Value 7 Precharge timeout settings Bit1 RW 0 6 Precharge timeout setting Bit0 00: 40 min; 01: 50min; 10: 60min; 11: 70min
RW 1 5 Retention 4 CHGLED mode selection 0: Charging Steady 1: flashes when charging
RW 0 3-2 Reservations, can not be changed 1-0 The constant current mode timeout setting Bit1-0 00: 6Hours; 01: 8Hours; 10: 10Hours; 11: 12Hours
RW 01
REG 35H: Spare battery charging control
- Default value: 22H
Bit Description R/W Default Value 7 Backup battery charge enable control 0: off; 1: open
RW 0 6-5 Target backup battery charging voltage set 00:3.1 V; 01:3.0 V; 10:3.6 V; 11:2.5 V
RW 01 4-2 Reservations, can not be changed 1-0 Spare battery charging current is set 00: 50uA; 01: 100uA; 10: 200uA; 11: 400uA
RW 10
REG 36H: PEK key parameter settings
- Default value: 9DH
Bit Description R/W Default Value 7-6 Boot time settings 00: 128mS; 01: 3S; 10: 1S; 11: 2S.
RW 01 5-4 Long key time set 00: 1S; 01: 1.5S; 10: 2S; 11: 2.5S.
RW 01 3 Key long when you grew up in the shutdown automatic shutdown feature set 0: off; 1: open
RW 1 2 The complete power start PWROK signal delay 0:8 mS; 1:64 mS
RW 1 1-0 Length setting shutdown 00: 4S; 01: 6S; 10: 8S; 11: 10S.
RW 01
REG 37H: DC-DC operating frequency is set
- Default value: 08H
Bit Description R/W Default Value 7-4 Reservations, can not be changed 3-0 DC-DC switching frequency is set Each level change of 5%, the default value of 1.5MHz F = [1 + / - (Bit3-0) * 5%)] * 1.5MHz
RW 1000
REG 38H: VLTF-charge Charging the battery temperature threshold set
- Default value: A5H of
Bit Description R/W Default Value 7-0 When charging the battery temperature threshold settings, M M * 10H, when M = A5H corresponding 2.112V; Corresponding voltage 0V3.264V
RW A5H
V LTF-charge = M * 10H * 0.0008V
REG 39H: VHTF-charge Battery charging high temperature threshold settings
- Default value: 1FH
Bit Description R/W Default Value 7-0 Charging battery high temperature threshold settings, N N * 10H, when N = 1FH corresponding 0.397V; can Corresponding voltage 0V3.264V
RW 1FH
VHTF-charge= N * 10H * 0.0008V
REG 3AH: system IPSOUT Vwarning Level1
- Default value: 68H
Bit Description R/W Default Value 7-0 System IPSOUT Vwarning Level1 RW 68H
REG 3BH: IPSOUT Vwarning Level2
- Default value: 5FH
Bit Description R/W Default Value 7-0 System IPSOUT Vwarning Level2 RW 5FH
The voltage setting of REG3AH, REG3BH corresponding relations as follows (assuming that the register value of n): Vwarning = 2.8672 + 1.4mV * n * 4
REG 3CH: VLTF-discharge Battery discharge temperature threshold set
- Default value: FCH
Bit Description R/W Default Value 7-0 Discharge the battery temperature threshold settings, M M * 10H, when M = FCH corresponding 3.226V; Corresponding voltage 0V3.264V
RW FCH
VLTF-discharge= M * 10H * 0.0008V
REG 3DH: VHTF-discharge Battery discharge high temperature threshold settings
- Default value: 16H
Bit Description R/W Default Value 7-0 Battery discharge high temperature threshold settings, N N * 10H, when of N = 16H, corresponding to 0.282V; can The voltage 0V3.264V,
RW 16H
V LTF-discharge = N * 10H * 0.0008V
REG 80H: DC-DC mode selection
- Default value: E0H
Bit Description R/W Default Value 7-3 Reservations, can not be changed 2 DC-DC2 operating mode control RW 0 1 DC-DC3 operating mode control 0: PFM / PWM auto-switching 1: fixed PWM
RW 0 0 Reservations, can not be changed
REG 82H: ADC Enable 1
- Default value: 83H
Bit Description R/W Default Value 7 Battery voltage ADC enable RW 1 6 Battery current ADC enable RW 0 5 The ACIN Voltage ADC is enabled. RW 0 4 The ACIN current ADC is enabled. RW 0 3 VBUS voltage ADC enable RW 0 2 The VBUS current ADC enable RW 0 1 APS voltage ADC enable RW 1 0 TS pin ADC function is enabled 0: Off, 1: open
RW 1
REG 83H: ADC Enable 2
- Default value: 80H
Bit Description R/W Default Value 7 AXP209 internal temperature monitoring ADC enable 0: Off, 1: open
RW 1 6-4 Reservations, can not be changed 3 The GPIO0 ADC enable RW 0 2 The GPIO1 ADC enable RW 0 1-0 Reservations, can not be changed 0: Off, 1: open
REG 84H: ADC sample rate settings, the TS pin control
- Default value: 32H
Bit Description R/W Default Value 7-6 ADC sampling rate is set 25 × 2 n Sampling rates of 25, 50, 100, 200Hz
RW 0 5-4 TS pin output current settings: 00:20 uA; 01:40 uA; 10:60 uA; 11:80 uA
RW 11 3 Reservations, can not be changed 2 TS pin function selection 0: battery temperature monitoring function, 1: independent external ADC input path
RW 0 1-0 TS pin current output settings 00: Off 01: On when charging 10: On when ADC enabled 11: Always on
RW 10
REG 85H: ADC input range
- Default value: X0H of
Bit Description R/W Default Value 7-2 Reservations, can not be changed 1 The GPIO1 ADC input range RW 0 0 The GPIO0 ADC input range 0:0-2.0475 V 1:0.7-2.7475 V
RW 0
REG 86H: GPIO1 ADC IRQ rising edge threshold set
- Default value: FFH
Bit Description R/W Default Value 7-0 One LSB 8mV RW FF
REG 87H: GPIO1 ADC IRQ falling edge threshold set
- Default value: 00H
Bit Description R/W Default Value 7-0 One LSB 8mV RW 00
REG 8AH: Timer control
- Default value: 00H
Bit Description R/W Default Value 7 Timer expires Write 1 to clear this status
RW 0 6-0 Set regular time in minutes To write 0 closed this timer
RW 0000000
REG 8BH: VBUS pin function control monitoring SRP
- Default value: 00H
Bit Description R/W Default Value 7-6 Reservations, can not be changed 5-4 VBUS valid voltage settings 00:4.0 V; 01:4.15 V; 10:4.45 V; 11:4.55 V
RW 00 3 VBUS Valid detection function settings: 0: Off, 1: Open RW 0 2 VBUS Session detection function settings: 0: Off, 1: Open RW 0 1 Discharge VBUS discharge feature set 0: Close VBUS discharge resistor; 1: VBUS discharge resistor
RW 0 0 Charge VBUS charge feature set 0: Disconnect VBUS charge resistor; 1: VBUS charging resistor to VBUS charge
RW 0
REG 8FH: over-temperature shutdown feature set
- Default value: 21H
Bit Description R/W Default Value 7-3 Reservations, can not be changed RW 0 2 AXP209 internal over-temperature shutdown feature set 0: Shutdown; 1: Shutdown
RW 0 1-0 Reservations, can not be changed
GPIO controls
REG 90H: GPIO0 feature set
- Default value: 07H
Bit Description Value R/W Default Value 7 GPIO0 rising edge interrupt or wakeup 0: disable 1: enable
RW 0 6 GPIO0 falling edge interrupt or wakeup RW 0 5-3 Reserved, can not be changed 2-0 GPIO0 pin function 000: low output 001: output (3.3V) 010: universal input function 011: low noise LDO5 100: ADC input 1XX: floating
RW 111
REG 91H: LDO5 output voltage as well as the EXTEN / GPIO output high set
- Default value: A5H of
Bit Description Value R/W Default Value 7-4 LDO5 output voltage settings Vout = [1.8 + (Bit7-4) * 0.1] V default = 1.8 +10 * 0.1 = 2.8V
RW 1010 3 Reserved, can not be changed 2-0 EXTEN, and GPIO [1:0] set the output high 000:1.8 V; 001:2.5 V; 010:2.8 V; 011:3.0 V 100:3.1 V; 101:3.3 V; 110:3.4 V; 111:3.5 V
RW 101
REG 92H: GPIO1 feature set
- Default value: 07H
Bit Description Values R/W Default Value 7 GPIO1 rising edge interrupt or wakeup 0: disable 1: enable
RW 0 6 GPIO1 falling edge interrupt or wakeup RW 0 5-3 Reserved, can not be changed 2-0 GPIO1 pin function 000: GPIO output low 001: GPIO output high (3.3V) 010: GPIO input 011: low-noise LDO 100: ADC input 1XX: floating
RW 111
REG 93H: GPIO2 feature set
- Default value: 07H
Bit Description Values R/W Default Value 7 GPIO2 rising edge interrupt or wakeup 0: disable 1: enable
RW 0 6 GPIO2 falling edge interrupt or wakeup RW 0 5-3 Reserved, can not be changed 2-0 GPIO2 pin function 000: GPIO output low (open drain) 001: floating 010: GPIO input XXX: floating
RW 111
REG 94H: GPIO [2:0] signal state setting and monitoring
- Default value: 00H
Bit Description Values R/W Default Value 7 Reserved, can not be changed 6 GPIO2 input state 0: input low 1: input high
R 5 GPIO1 input state R 4 GPIO0 input state R 3-0 Reserved, can not be changed
REG 95H: GPIO3 set
- Default value: 00H
Bit Description Values R/W Default Value 7 GPIO3 rising edge interrupt or wakeup 0: disable 1: enable
RW 0 6 GPIO3 falling edge interrupt or wakeup RW 0 5-3 Reserved, can not be changed 2 GPIO3 pin function 0: NMOS Open Drain Output 1: digital input function
RW 0 1 GPIO3 output settings 0: output low, NMOS on 1: floating, NMOS off
RW 1 0 GPIO3 input state 0: input high 1: input low
R
Interrupts
REG 40H and 48H: IRQ enable IRQ state
The IRQ enable 1, REG40H: The default value: D8H IRQ state REG48H: default value: 00H
Bit Description R/W Default Value 7-0 The meaning of the status bits of each bit corresponding to 40H; For example: Bit7 is ACIN overvoltage IRQ status bits
RW 0
REG 41H and 49H of the: IRQ Enable IRQ state 2
- IRQ energy 2 REG41H: default value: FFH
Bit Description R/W Default Value 7 IRQ enable battery access RW 1 6 IRQ enable battery removed RW 1 5 The battery activation patterns IRQ enable RW 1 4 The exit cell activation patterns IRQ enable RW 1 3 The is charging IRQ enable RW 1 2 The charging completed IRQ enable RW 1 1 Battery over-temperature IRQ enabled RW 1 0 IRQ Enable battery low temperature RW 1
Bit Description R/W Default Value 7 The ACIN overvoltage IRQ enable RW 1 6 The ACIN access IRQ enable RW 1 5 ACIN out of IRQ enable RW 0 4 VBUS overvoltage IRQ enabled RW 1 3 And VBUS access IRQ enable RW 1 2 The VBUS removed IRQ enabled RW 0 1 VBUS available but less than VHOLD IRQ is enabled
RW 0 0 Reservations, can not be changed RW 0
- The IRQ state REG49H: default value: 00H
Bit Description R/W Default Value 7-0 The meaning of the status bits, respectively, each bit of the corresponding 41H RW 0
REG 42H 4AH: IRQ enable IRQ state
- IRQ can 3 REG42H: default value: 03H
Bit Description R/W Default Value 7 AXP209 Internal overtemperature IRQ enable RW 0 6 The charging current is less than the set current IRQ enable RW 0 5 Reservations, can not be changed 4 DC-DC2 output voltage is less than the set value IRQ enable RW 0 3 DC-DC3 output voltage is less than the set value IRQ enable RW 0 2 LDO3 output voltage is less than the set value IRQ enable 1 The PEK short key IRQ enable RW 1 0 PEK long keys IRQ enable RW 1
- The IRQ state REG4AH: default value: 00H
Bit Description R/W Default Value 7-0 The meaning of the status bits, respectively, each bit of the corresponding 42H RW 0
REG 43H 4BH: IRQ Enable 4 and IRQ state
- IRQ Enable 4, REG43H: default value: 01H
Bit Description R/W Default Value 7 N_OE boot IRQ enable RW 0 6 IRQ enable N_OE shutdown RW 0 5 VBUS valid IRQ enabled RW 0 4 VBUS invalid IRQ enable RW 0 3 VBUS Session A / B IRQ enable RW 0 2 VBUS Session End IRQ enable RW 0 1 The APS low pressure IRQ Enable (LEVEL1) RW 0 0 The APS low pressure IRQ Enable (LEVEL2) RW 1
- The IRQ state REG4BH: default value: 00H
Bit Description R/W Default Value 7-0 The meaning of the status bits, respectively, each bit of the corresponding 43H RW 0
REG 44H and 4C: IRQ enable IRQ state 5
- IRQ can 5 REG44H default value: 00H;
Bit Description R/W Default Value 7 Timer timeout IRQ enable RW 0 6 PEK button on the rising edge IRQ enable RW 0 5 PEK buttons enable falling edge of IRQ RW 0 4 Reservations, can not be changed RW 0 3 GPIO3 input edge-triggered IRQ enable RW 0 2 GPIO2 input edge-triggered IRQ enable RW 0 1 The GPIO1 input edge-triggered or ADC input IRQ enabled RW 0 0 GPIO0 input edge-triggered IRQ enable RW 0
- The the IRQ state of 5 REG4CH: default value: 00H
Bit Description R/W Default Value 7-0 The meaning of the status bits, respectively, each bit of the corresponding 44H RW 0
- Note: All IRQ status register corresponding bit write clears state.
ADC Measurement Values
First register is high 8 bits, second is lower 4 (lower 5 for battery discharge current).
Channel Registers 000h Step FFFh ACIN Voltage 56h, 57h 0 mV 1.7 mV 6.9615 V ACIN Current 58h, 59h 0 mA 0.625 mA 2.5594 A VBUS voltage 5Ah, 5Bh 0 mV 1.7 mV 6.9615 V VBUS Current 5Ch, 5Dh 0 mA 0.375 mA 1.5356 A Internal Temperature 5Eh, 5Fh -144.7 C 0.1 C 264.8 C Temperature Sensor Voltage 62h, 63h 0 mV 0.8 mV 3.276 V APS (IPSOUT) Voltage 7Eh, 7Fh 0 mV 1.4 mV 5.733 V Battery Voltage 78h, 79h 0 mV 1.1 mV 4.5045 V Battery Discharge Current 7Ah, 7Bh 0 mA 0.5 mA 4.095 A Battery Charge Current 7Ch, 7Dh 0 mA 0.5 mA 4.095 A
REG B8H: Coulomb Counter Control
- Default value: 00H
Bit Description R/W Default Value 7 The coulomb meter switch control RW 0 6 Coulomb Counter pause control, the write will be suspended Coulomb counting while this bit is cleared from RW 0 5 The clear Coulomb Counter control bit write Coulomb Counter will be cleared while this bit is cleared from RW 0 4-2 Reservations, can not be changed RW 0 1-0 The decryption start bit, decryption start automatically cleared RW 0 0 Decryption is complete 0: not completed 1: Complete
RW 0
REG B9H: power measurement results
- Default value: 7FH
Bit Description R/W Default Value 7 Metering system control 0: normal operating mode 1: suspend work
RW 0 6-0 Measurement results, the percentage of R 7F
Spec Sheets
- AXP209 Datasheet v1.0 English (PDF, ~2.4MB)
- AXP209 Datasheet v1.0 Chinese (PDF, ~1.2MB)
