ATmega406 Atmel Corporation, ATmega406 Datasheet - Page 132

• Manufacturer Part Number: ATmega406
• Manufacturer: Atmel Corporation

Specifications of ATmega406

• Flash (kbytes): 40 Kbytes
• Pin Count: 48
• Max. Operating Frequency: 1 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 8
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 18
• Ext Interrupts: 4
• Usb Speed: No
• Usb Interface: No
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 12
• Adc Speed (ksps): 1.9
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 2
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -30 to 85
• I/o Supply Class: 4.0 to 25
• Operating Voltage (vcc): 4.0 to 25
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 3
• Pwm Channels: 2
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

22.7.7
132
ATmega406
BPIR – Battery Protection Interrupt Register
• Bit 7 – DUVIF: Deep Under-voltage Early Warning Interrupt Flag
If the voltage at VFET pin is below the Deep Under-voltage detection level and only 250 ms is
left of the Deep Under-voltage delay, DUVIF becomes set. The flag must be cleared by writing a
logical one to it.
• Bit 6 – COCIF: Charge Over-current Protection Activated Interrupt Flag
When the Charge Over-current Protection is activated, COCIF becomes set. The flag must be
cleared by writing a logical one to it.
• Bit 5 – DOCIF: Discharge Over-current Protection Activated Interrupt Flag
When the Discharge Over-current Protection is activated, DOCIF becomes set. The flag must be
cleared by writing a logical one to it.
• Bit 4 – SCIF: Short-circuit Protection Activated Interrupt Flag
When the Short-circuit Protection is activated, SCIF becomes set. The flag must be cleared by
writing a logical one to it.
• Bit 3 – DUVIE: Deep Under-voltage Early Warning Interrupt Enable
The DUVIE bit enables interrupt caused by the Deep Under-voltage Early Warning Interrupt Flag
• Bit 2 – COCIE: Charge Over-current Protection Activated Interrupt Enable
The COCIE bit enables interrupt caused by the Charge Over-current Protection Activated Inter-
rupt Flag.
• Bit 1 – DOCIE: Discharge Over-current Protection Activated Interrupt Enable
The DOCIE bit enables interrupt caused by the Discharge Over-current Protection Activated
Interrupt Flag.
• Bit 0 – SCIE: Short-circuit Protection Activated Interrupt Enable
The SCIE bit enables interrupt caused by the Short-circuit Protection Activated Interrupt Flag.
If one of the Battery Protection Interrupt Flags is set, and the corresponding Interrupt Enable bit
and the I-bit in the Status Register (SREG) are set, the MCU will jump to the Battery Protection
interrupt vector. The application software must read the Battery Protection Interrupt Register to
determine the cause of the interrupt. The interrupt flags will not be cleared when the interrupt
routine is executed, they must be cleared by writing a logical one to them.
Bit
(0xF2)
Read/Write
Initial Value
DUVIF
R/W
7
0
COCIF
R/W
6
0
DOCIF
R/W
5
0
SCIF
R/W
4
0
DUVIE
R/W
3
0
COCIE
R/W
2
0
DOCIE
R/W
1
0
SCIE
R/W
0
0
2548E–AVR–07/06
BPIR