ATmega48 Automotive Atmel Corporation, ATmega48 Automotive Datasheet - Page 153

• 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

18.10.3
18.10.3.1
18.10.3.2
7701E–AVR–02/11
ADCL and ADCH – ADC Data Register
ADLAR = 0
ADLAR = 1
Table 18-6.
When an ADC conversion is complete, the result is found in these two registers.
When ADCL is read, the ADC Data Register is not updated until ADCH is read. Consequently,
if the result is left adjusted and no more than 8-bit precision is required, it is sufficient to read
ADCH. Otherwise, ADCL must be read first, then ADCH.
The ADLAR bit in ADCSRB, and the MUXn bits in ADMUX affect the way the result is read
from the registers. If ADLAR is set, the result is left adjusted. If ADLAR is cleared (default), the
result is right adjusted.
• ADC9:0: ADC Conversion Result
These bits represent the result from the conversion, as detailed in
on page
Bit
0x05 (0x25)
0x04 (0x24)
Read/Write
Initial Value
Bit
0x05 (0x25)
0x04 (0x24)
Read/Write
Initial Value
ADPS2
147.
1
1
1
1
ADC Prescaler Selections (Continued)
ADC7
ADC9
ADC1
15
15
R
R
R
R
–
7
0
0
7
0
0
ADC6
ADC8
ADC0
14
14
R
R
ADPS1
–
6
0
0
R
R
6
0
0
Atmel ATtiny24/44/84 [Preliminary]
0
0
1
1
ADC5
ADC7
13
13
R
R
–
5
0
0
R
R
–
5
0
0
ADC4
ADC6
12
12
R
R
–
4
0
0
R
R
–
4
0
0
ADPS0
0
1
0
1
ADC3
ADC5
11
11
R
R
–
3
0
0
R
R
–
3
0
0
ADC2
ADC4
10
10
R
R
–
2
0
0
R
R
–
2
0
0
“ADC Conversion Result”
ADC9
ADC1
ADC3
Division Factor
R
R
9
1
0
0
R
R
9
–
1
0
0
128
16
32
64
ADC8
ADC0
ADC2
R
R
8
0
0
0
R
R
8
–
0
0
0
ADCH
ADCL
ADCH
ADCL
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