ATMEGA8HVA-4TU Atmel, ATMEGA8HVA-4TU Datasheet - Page 150
ATMEGA8HVA-4TU
Manufacturer Part Number
ATMEGA8HVA-4TU
Description
MCU AVR 8K FLASH 4MHZ 28-TSOP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA16HVA-4CKU.pdf
(196 pages)
Specifications of ATMEGA8HVA-4TU
Core Processor
AVR
Core Size
8-Bit
Speed
4MHz
Connectivity
SPI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
7
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)
1.8 V ~ 9 V
Data Converters
A/D 5x12b
Oscillator Type
External
Operating Temperature
-20°C ~ 85°C
Package / Case
28-TSOP
For Use With
ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK500 - PROGRAMMER AVR STARTER KIT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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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
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