ATMEGA323-8AI Atmel, ATMEGA323-8AI Datasheet - Page 131
![IC AVR MCU 32K 8MHZ IND 44TQFP](/photos/6/70/67042/313-44-tqfp_sml.jpg)
ATMEGA323-8AI
Manufacturer Part Number
ATMEGA323-8AI
Description
IC AVR MCU 32K 8MHZ IND 44TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA323L-4PC.pdf
(247 pages)
Specifications of ATMEGA323-8AI
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
32
Program Memory Size
32KB (16K x 16)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
2K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-TQFP, 44-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
ATMEGA3238AI
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ADC Noise Canceler
Function
1457G–AVR–09/03
Figure 64. ADC Timing Diagram, Free Run Conversion
Table 44. ADC Conversion Time
The ADC features a noise canceler that enables conversion during ADC Noise Reduc-
tion mode (see “Sleep Modes” on page 39) to reduce noise induced from the CPU core
and other I/O peripherals. If other I/O peripherals must be active during conversion, this
mode works equivalently for Idle mode. To make use of this feature, the following proce-
dure should be used:
1. Make sure that the ADC is enabled and is not busy converting. Single Conver-
2. Enter ADC Noise Reduction mode (or Idle mode). The ADC will start a conver-
3. If no other interrupts occur before the ADC conversion completes, the ADC inter-
Condition
Extended Conversion
Normal Conversions
sion mode must be selected and the ADC conversion complete interrupt must be
enabled.
ADEN = 1
ADSC = 0
ADFR = 0
ADIE = 1
sion once the CPU has been halted.
rupt will wake up the CPU and execute the ADC Conversion Complete interrupt
routine.
Cycle Number
ADC Clock
ADSC
ADIF
ADCH
ADCL
Sample & Hold (Cycles from
Conversion
Complete
Start of Conversion)
One Conversion
11
12
13.5
1.5
13
Next Conversion
1
Sign and MSB of Result
LSB of Result
2
MUX and REFS
Update
Time (Cycles)
3
Conversion
ATmega323(L)
Sample & Hold
25
13
4
Conversion
Time (µs)
125 - 500
65 - 260
131
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