ATmega48 Automotive Atmel Corporation, ATmega48 Automotive Datasheet - Page 330

• 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

35. Errata
35.1
35.2
330
Rev. F
Rev. E
ATmega48/88/168 Automotive
ATmega168
The revision letter in this section refers to the revision of the ATmega168 device.
•
If one of the timer registers which is synchronized to the asynchronous timer2 clock is written in
the cycle before an overflow interrupt occurs, the interrupt may be lost.
Always check that the Timer2 Timer/Counter register, TCNT2, does not have the value 0xFF
before writing the Timer2 Control Register, TCCR2, or Output Compare Register, OCR2.
•
•
If one of the timer registers which is synchronized to the asynchronous timer2 clock is written in
the cycle before an overflow interrupt occurs, the interrupt may be lost.
Always check that the Timer2 Timer/Counter register, TCNT2, does not have the value 0xFF
before writing the Timer2 Control Register, TCCR2, or Output Compare Register, OCR2.
If Vcc ramp up from a stable 150mV to 300mV plateau, the Power On Reset (POR) may not
reset the device properly.
Note:
Interrupts may be lost when writing the timer registers in the asynchronous timer
Interrupts may be lost when writing the timer registers in the asynchronous timer
POR sensitivity with Vcc ramp up from a very low supply voltage
1. Interrupts may be lost when writing the timer registers in the asynchronous timer
Problem Fix/Workaround
1. Interrupts may be lost when writing the timer registers in the asynchronous timer
Problem Fix/Workaround
2. POR sensitivity with Vcc ramp up from a very low supply voltage
Problem Fix/Workaround
None.
Please note from datasheet 7530F-AVR-09/07 we introduce a new errata numbering scheme
(Errata Rev F of datasheet 7530E-AVR-03/07 is equivalent to Errata Rev E of datasheet
7530F-AVR-09/07)
7530I–AVR–02/10