ATMEGA8L-8PJ Atmel, ATMEGA8L-8PJ Datasheet - Page 192
ATMEGA8L-8PJ
Manufacturer Part Number
ATMEGA8L-8PJ
Description
IC MCU AVR 8K 5V 8MHZ 28-DIP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA8L-8PJ
Core Processor
AVR
Core Size
8-Bit
Speed
8MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
23
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 6x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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ATmega8(L)
The actual sample-and-hold takes place 1.5 ADC clock cycles after the start of a normal conver-
sion and 13.5 ADC clock cycles after the start of an first conversion. When a conversion is
complete, the result is written to the ADC Data Registers, and ADIF is set. In single conversion
mode, ADSC is cleared simultaneously. The software may then set ADSC again, and a new
conversion will be initiated on the first rising ADC clock edge.
In Free Running mode, a new conversion will be started immediately after the conversion com-
pletes, while ADSC remains high. For a summary of conversion times, see
193.
Figure 92. ADC Timing Diagram, First Conversion (Single Conversion Mode)
Figure 93. ADC Timing Diagram, Single Conversion
Cycle Number
ADC Clock
ADSC
ADIF
ADCH
ADCL
Cycle Number
ADC Clock
ADEN
ADSC
ADIF
ADCH
ADCL
1
1
2
MUX and REFS
Update
2
MUX and REFS
Update
12
3
13
Sample & Hold
4
14
5
15
6
Sample & Hold
16
First Conversion
17
7
One Conversion
18
8
19
9
20
10
Conversion
Complete
21
11
22
Conversion
Complete
23
12
24
13
25
MSB of Result
LSB of Result
LSB of Result
MSB of Result
Next Conversion
1
Table 73 on page
Next
Conversion
1
2
2
MUX and REFS
Update
2486Z–AVR–02/11
MUX and REFS
Update
3
3
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