AT90LS4433-4PI Atmel, AT90LS4433-4PI Datasheet - Page 67
![IC MCU 4K FLSH 4MHZ A/D LV 28DIP](/photos/7/21/72189/453-28-dip_sml.jpg)
AT90LS4433-4PI
Manufacturer Part Number
AT90LS4433-4PI
Description
IC MCU 4K FLSH 4MHZ A/D LV 28DIP
Manufacturer
Atmel
Series
AVR® 90LSr
Datasheet
1.AT90S4433-8AC.pdf
(126 pages)
Specifications of AT90LS4433-4PI
Core Processor
AVR
Core Size
8-Bit
Speed
4MHz
Connectivity
SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
20
Program Memory Size
4KB (2K x 16)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
128 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 6 V
Data Converters
A/D 6x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
28-DIP (0.300", 7.62mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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ADC Noise Canceler
Function
1042H–AVR–04/03
Figure 47. ADC Timing Diagram, Single Conversion
Figure 48. ADC Timing Diagram, Free Run Conversion
The ADC features a Noise Canceler that enables conversion during Idle mode to reduce
noise induced from the CPU core. To make use of this feature, the following procedure
should be used:
1. Make sure that the ADC is enabled and is not busy converting. Single Conver-
2. Enter Idle mode. The ADC will start a conversion once the CPU has been halted.
3. If no other interrupts occur before the ADC conversion completes, the ADC inter-
Cycle Number
ADC Clock
ADSC
ADIF
ADCH
ADCL
sion mode must be selected and the ADC conversion complete interrupt must be
enabled. Thus:
ADEN = 1
ADSC = 0
ADFR = 0
ADIE = 1
rupt will wake up the MCU and execute the ADC conversion complete interrupt
routine.
1
Cycle Number
ADC Clock
ADSC
Hold Strobe
ADIF
ADCH
ADCL
2
MUX and REFS
Update
3
Sample & Hold
4
5
One Conversion
11
6
7
12
One Conversion
8
13
9
Next
Conversion
10
Conversion
1
MSB of Result
LSB of Result
complete
11
2
AT90S/LS4433
12
13
Sign and MSB of Result
LSB of Result
Next Conversion
1
2
MUX and REFS
Update
3
67
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