ATMEGA8HVA-4TU Atmel, ATMEGA8HVA-4TU Datasheet - Page 114
![MCU AVR 8K FLASH 4MHZ 28-TSOP](/photos/7/21/72191/313-28-tsop_sml.jpg)
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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20.4
20.4.1
20.4.2
114
Register Description
ATmega8HVA/16HVA
VADMUX – V-ADC Multiplexer Selection Register
VADCSR – V-ADC Control and Status Register
• Bit 7:4 – RES: Reserved Bits
These bits are reserved bits in the ATmega8HVA/16HVA and will always read as zero.
• Bit 3:0 – VADMUX3:0: V-ADC Channel Selection Bits
The VADMUX bits determine the V-ADC channel selection. See
Table 20-1.
Note:
• Bit 7:4 – RES: Reserved Bits
These bits are reserved bits in the ATmega8HVA/16HVA and will always read as zero.
• Bit 3 – VADEN: V-ADC Enable
Writing this bit to one enables V-ADC conversion. By writing it to zero, the V-ADC is turned off.
Turning the V-ADC off while a conversion is in progress will terminate this conversion. Note that
the bandgap voltage reference must be enabled separately, see “BGCCR – Bandgap Calibra-
tion C Register” on page 118.
• Bit 2 – VADSC: Voltage ADC Start Conversion
Write this bit to one to start a new conversion of the selected channel.
Bit
(0x7C)
Read/Write
Initial Value
Bit
(0x7A)
Read/Write
Initial Value
1. VTEMP must be measured in Active mode to get the highest accuracy when using calibration
VADMUX3:0
0111...1111
value stored in signature row.
0000
0001
0010
0011
0100
0101
0110
VADMUX channel selection
R
7
–
0
R
7
–
0
R
6
–
0
R
6
–
0
R
5
–
0
R
5
–
0
Channel Selected
R
R
4
–
0
4
–
0
RESERVED
RESERVED
RESERVED
VTEMP
CELL 1
CELL 2
ADC0
ADC1
VADMUX3
VADEN
R/W
R/W
3
0
3
0
(1)
VADMUX2
VADSC
R/W
R/W
2
0
2
0
Table 20-1 on page
VADMUX1
VADCCIF
R/W
R/W
1
0
1
0
VADMUX0
Scale
VADCCIE
0.2
0.2
1.0
1.0
1.0
R/W
–
–
–
R/W
0
0
0
0
8024A–AVR–04/08
114.
VADMUX
VADCSR
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