ATMEGA8HVD-4MX Atmel, ATMEGA8HVD-4MX Datasheet - Page 108

• Manufacturer Part Number: ATMEGA8HVD-4MX
• Description: MCU AVR 8K FLASH 2.1-8V 4MHZ QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8HVD-4MX

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: POR, WDT
• Number Of I /o: 5
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 2.4 V
• Data Converters: A/D 1x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 18-MLF® Exposed Pad (Staggered Leads), DFN
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK500 - PROGRAMMER AVR STARTER KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Connectivity: -

20.7
20.8
20.8.1
108
Battery Protection CPU Interface
Register Description
ATmega4HVD/8HVD
BPPLR – Battery Protection Parameter Lock Register
The Battery Protection CPU Interface is illustrated in
Figure 20-2. Battery Protection CPU Interface
Each protection originating from the Current Battery Protection module has an Interrupt Flag.
All enabled flags are combined into a single battery protection interrupt request to the CPU.
This interrupt can wake up the CPU from any operation mode, except Power-off. The interrupt
flags are cleared by writing a logic ‘1’ to their bit locations from the CPU. An interrupt event for
the External Protection Input can be generated by enabling the external interrupt for the input
port.
Note that there are neither flags nor status bits indicating that the chip has entered the Power
Off mode. This is because the CPU is powered down in this mode. The CPU will, however be
able to detect that it came from a Power-off situation by monitoring CPU reset flags when it
resumes operation.
• Bit 7:2 – Res: Reserved Bits
These bits are reserved and will always read as zero.
Bit
Read/Write
Initial Value
Battery Protection
Parameter Lock
Register
EXTPROT
GND
NI
R
7
–
0
Battery Protection
Level Register
LOCK?
R
6
–
0
R
5
–
0
Battery Protection
Timing Register
Protection
Current
Battery
LOCK?
R
4
–
0
Battery Protection
Control Register
LOCK?
R
3
–
0
Figure
Power-off
20-2.
R
2
–
0
Interrupt
Request
Protection
Battery
BPPLE
R/W
1
0
8-BIT DATA BUS
Acknowledge
Protection
Interrupt
Register
Interrupt
Battery
Control
3
/
FET
BPPL
R/W
0
0
3
3
8052B–AVR–09/08
/
/
BPPLR