ATMEGA8HVD-4MX Atmel, ATMEGA8HVD-4MX Datasheet - Page 56

• 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: -

13. High Voltage I/O Ports
All high voltage AVR ports have true Read-Modify-Write functionality when used as general
digital I/O ports. This means that the state of one port pin can be changed without unintention-
ally changing the state of any other pin with the SBI and CBI instructions. All high voltage I/O
pins have protection Zener diodes to Ground as indicated in
Figure
13-1. See
”Electrical Char-
acteristics” on page 142
for a complete list of parameters.
Figure 13-1. High Voltage I/O Pin Equivalent Schematic
Logic
Pxn
C
pin
Note:
1. See
Figure 13-2 on page 57
for details.
All registers and bit references in this section are written in general form. A lower case “x” rep-
resents the numbering letter for the port, and a lower case “n” represents the bit number.
However, when using the register or bit defines in a program, the precise form must be used.
For example, PORTC3 for bit number three in Port C, here documented generally as PORTxn.
The physical I/O Registers and bit locations are listed in
”Register Description” on page
60.
One I/O Memory address location is allocated for each high voltage port, the Data Register –
PORTx. The Data Register is read/write.
Using the I/O port as General Digital Output is described in
”High Voltage Ports as General
Digital Outputs” on page
57.
ATmega4HVD/8HVD
56
8052B–AVR–09/08