ATmega48 Automotive Atmel Corporation, ATmega48 Automotive Datasheet - Page 242

• Manufacturer Part Number: ATmega48 Automotive
• Manufacturer: Atmel Corporation

Specifications of ATmega48 Automotive

• Flash (kbytes): 4 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 23
• Ext Interrupts: 24
• Usb Speed: No
• Usb Interface: No
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 0.5
• Eeprom (bytes): 256
• Self Program Memory: NO
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 125
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 6
• Input Capture Channels: 1
• Pwm Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

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ATmega48/88/168 Automotive
Figure 21-6. ADC Timing Diagram, Auto Triggered Conversion
Figure 21-7. ADC Timing Diagram, Free Running Conversion
Table 21-1.
Condition
First conversion
Normal conversions, single ended
Auto Triggered conversions
Cycle Number
ADC Clock
Trigger
Source
ADATE
ADIF
ADCH
ADCL
Prescaler
Reset
ADC Conversion Time
MUX and REFS
Update
Cycle Number
ADC Clock
ADSC
ADIF
ADCH
ADCL
1
2
Conversion
Complete
3
One Conversion
Sample &
Hold
11
4
Sample & Hold (Cycles from
Start of Conversion)
12
5
6
13
7
13.5
One Conversion
Next Conversion
1
1.5
Sign and MSB of Result
LSB of Result
2
8
2
MUX and REFS
Update
9
3
10
Conversion
Complete
Sample & Hold
11
4
12
Conversion Time (Cycles)
13
Sign and MSB of Result
13.5
LSB of Result
25
13
Next Conversion
7530I–AVR–02/10
1
Prescaler
Reset
2