ATMEGA8HVD-4MX Atmel, ATMEGA8HVD-4MX Datasheet - Page 70

• 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: -

14.4
14.4.1
14.4.2
14.4.3
14.4.4
70
Register Description
ATmega4HVD/8HVD
MCUCR – MCU Control Register
PORTB – Port B Data Register
DDRB – Port B Data Direction Register
PINB – Port B Input Pins Address
• Bit 4 – PUD: Pull-up Disable
When this bit is written to one, the pull-ups in the I/O ports are disabled even if the DDxn and
PORTxn Registers are configured to enable the pull-ups ({DDxn, PORTxn} = 0b01). See
”Configuring the Pin” on page 62
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
N/A
R
7
–
0
7
R
0
R
R
7
0
7
-
-
-
N/A
R
R
R
R
6
–
0
6
0
6
0
6
-
-
-
CKOE
for more details about this feature.
N/A
R/W
R
R
5
0
5
0
5
R
-
-
-
5
0
N/A
R
R
4
0
4
0
R
-
4
PUD
-
-
R/W
4
0
N/A
R
R
3
0
3
0
R
-
3
-
-
R
3
–
0
PORTB2
DDB2
PINB2
R/W
R/W
N/A
2
0
R
2
0
2
2
–
R
0
PORTB1
DDB1
PINB1
R/W
R/W
N/A
1
0
1
0
R
1
R
1
–
0
PORTB0
PINB0
DDB0
R/W
R/W
N/A
0
0
0
0
R
R
0
0
–
0
8052B–AVR–09/08
MCUCR
PORTB
DDRB
PINB