ATEVK527 Atmel, ATEVK527 Datasheet - Page 20

• Manufacturer Part Number: ATEVK527
• Description: KIT EVAL PWM AVR USB 4 SERIES
• Manufacturer: Atmel
• Series: AVR®r

Specifications of ATEVK527

• Main Purpose: Power Management, Battery Charger
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: ATmega16U4, ATmega32U4
• Primary Attributes: 1 Cell- Li-Ion
• Secondary Attributes: Graphical User Interface, USB Interface
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

4.5.2 Charge Halt Determination
Charge halt is determined by HaltNow(). This function is called by ConstantCurrent()
and ConstantVoltage() every time they loop, to decide if a stage of charging is done.
With the variable HaltParameters the user can specify at what terms the charging
should be halted, and if an error should be flagged if for example the time limit
expires. An error flag will also result in ST_ERROR being set as the next state,
thereby aborting the charge. If no errors are flagged, the next desired state, set earlier
in Charge(), will apply.
Lastly, the function checks if temperature is within limits, if the battery is OK and if
mains voltage is above minimum. Should any of these tests fail, the next state is set
to an appropriate error handler (ST_ERROR, ST_INIT or ST_SLEEP) and charging is
aborted.
AVR146
20
7801A-AVR-06/08