ATMEGA8HVD-4MX Atmel, ATMEGA8HVD-4MX Datasheet - Page 66

• 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: -

14.2.6
14.3
66
Alternate Port Functions
ATmega4HVD/8HVD
Unconnected Pins
If some pins are unused, it is recommended to ensure that these pins have a defined level.
Even though most of the digital inputs are disabled in the deep sleep modes as described
above, floating inputs should be avoided to reduce current consumption in all other modes
where the digital inputs are enabled (Reset, Active mode and Idle mode).
The simplest method to ensure a defined level of an unused pin, is to enable the internal pull-
up. In this case, the pull-up will be disabled during reset. If low power consumption during
reset is important, it is recommended to use an external pull-up or pull-down. Connecting
unused pins directly to V
rents if the pin is accidentally configured as an output.
Many low voltage port pins have alternate functions in addition to being general digital I/Os.
Figure 14-5 on page 67
on page 62
ent in all port pins, but the figure serves as a generic description applicable to all port pins in
the AVR microcontroller family.
can be overridden by alternate functions. The overriding signals may not be pres-
shows how the port pin control signals from the simplified
CC
or GND is not recommended, since this may cause excessive cur-
8052B–AVR–09/08
Figure 14-2