ATmega8HVA Atmel Corporation, ATmega8HVA Datasheet - Page 149

• Manufacturer Part Number: ATmega8HVA
• Manufacturer: Atmel Corporation

Specifications of ATmega8HVA

• Flash (kbytes): 8 Kbytes
• Pin Count: 28
• Max. Operating Frequency: 4 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 3
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 6
• Ext Interrupts: 3
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 6
• Adc Resolution (bits): 12
• Adc Speed (ksps): 1.9
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: No
• Sram (kbytes): 0.5
• Eeprom (bytes): 256
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -20 to 85
• I/o Supply Class: 1.8 to 9.0
• Operating Voltage (vcc): 1.8 to 9.0
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 4
• Input Capture Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

27. Memory Programming
27.1
27.2
8024A–AVR–04/08
Program And Data Memory Lock Bits
Fuse Bits
The ATmega8HVA/16HVA provides two Lock bits which can be left unprogrammed (“1”) or can
be programmed (“0”) to obtain the additional features listed in
be erased to “1” with the Chip Erase command.
Table 27-1.
Note:
Table 27-2.
Notes:
The ATmega8HVA/16HVA has two Fuse bytes.
functionality of all the fuses and how they are mapped into the Fuse byte. Note that the fuses are
read as logical zero, “0”, if they are programmed.
Lock Bit Byte
LB2
LB1
LB Mode
1
2
3
1. “1” means unprogrammed, “0” means programmed
1. Program the Fuse bits before programming the LB1 and LB2.
2. “1” means unprogrammed, “0” means programmed.
Memory Lock Bits
Lock Bit Byte
Lock Bit Protection Modes
LB2
1
1
0
Bit No
LB1
1
0
0
7
6
5
4
3
2
1
0
Protection Type
No memory lock features enabled.
The Fuse bits are locked, and further programming of the
Flash and EEPROM is disabled in Programming mode.
The Fuse bits are locked, and further programming and
verification of the Flash and EEPROM is disabled in
Programming mode.
Description
–
–
–
–
–
–
Lock bit
Lock bit
(1)(2)
Table 27-4
ATmega8HVA/16HVA
(1)
and
Table
Table 27-3
27-2. The Lock bits can only
Default Value
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
describe briefly the
(1)
(1)
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