ATmega8HVA Atmel Corporation, ATmega8HVA Datasheet - Page 150

• 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

27.2.1
27.2.2
27.2.3
150
ATmega8HVA/16HVA
High Byte
Low Byte
Latching of Fuses
Table 27-3.
Note:
Table 27-4.
Notes:
The status of the Fuse bits is not affected by Chip Erase. Note that the Fuse bits are locked if
Lock bit1 (LB1) is programmed. Program the Fuse bits before programming the Lock bits.
The fuse values are latched when the device enters programming mode and changes of the
fuse values will have no effect until the part leaves Programming mode. This does not apply to
the EESAVE Fuse which will take effect once it is programmed. The fuses are also latched on
Power-up in Normal mode.
Bit No
Bit No
7:2
1
0
7
6
5
4
3
2
1
0
1. The default OSCSEL1:0 setting should not be changed. OSCSEL1:0 = ‘00’ is reserved for test
1. See
2. The SPIEN Fuse is not accessible in SPI programming mode.
3. See
Fuse Low Byte
WDTON
EESAVE
SPIEN
DWEN
SELFPRGEN
SUT2
SUT1
SUT0
purposes. Other values are reserved for future use.
Fuse High Byte
OSCSEL1
OSCSEL0
Fuse High Byte
Fuse Low Byte
Table 9-1 on page 25
”WDTCSR – Watchdog Timer Control Register” on page 49
(1)
(1)
(1)
(2)
(3)
–
Watchdog Timer always on
EEPROM memory is preserved
through the Chip Erase
Enable SPI Programming Interface
Enable debugWIRE
Self Programming enable
Select start-up time
Select start-up time
Select start-up time
for details about start-up time.
Oscillator Select 1
Oscillator Select 0
Description
Description
–
1 (unprogrammed)
0 (programmed)
Default Value
1 (unprogrammed)
Default Value
1 (unprogrammed)
1 (unprogrammed, EEPROM
not preserved)
0 (programmed, SPI prog.
enabled)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
for details.
8024A–AVR–04/08