AT90CAN64 Atmel Corporation, AT90CAN64 Datasheet - Page 419

• Manufacturer Part Number: AT90CAN64
• Manufacturer: Atmel Corporation

Specifications of AT90CAN64

• Flash (kbytes): 64 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Can: 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): 4
• Eeprom (bytes): 2048
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

7679H–CAN–08/08
4. Reset of Timer-2 flags in asynchronous mode
3. Miss-functioning when code stack is in XRAM
2. Extra consumption in power reduction modes
1. Power supply current in Power-down mode
In asynchronous mode, a writing in any register of the TIMER-2 (TCCR2A, TCNT2 &
OCR2A) automatically clears TOV2 and OCF2A flags in TFIR register.
Problem fix / workaround
– TOV2: Do not write in Timer-2 registers if TCNT2 is equal to 0xFF, 0x00 or 0x01.
– OCF2A: Do not write in Timer-2 registers if TCNT2 and OCR2A differ from -1, 0 or 1.
If the stack pointer (SP) targets the XRAM and if the execution of an instruction is split to
serve a rising interrupt, the last operation of this instruction, executed after pushing out the
return address from XRAM, may be disturbed providing wrong data to the system.
Example: - the “OUT” instruction can be executed twice
Problem fix / workaround
Map the code stack in internal SRAM.
When AVCC is selected as voltage reference for ADC (REF[1,0]=0,1), an extra consumption
close to 30 µA (5.0V/25°C) appears in power reduction modes.
Problem fix / workaround
Switch from AVCC to AREF pin (REF[1,0]=0,0) before enabling one of the power reduction
modes.
The power supply current in Power-down mode of AT90CAN128 parts with lot number
before A04900 is:
T
Symbol
A
= - 40°C to + 85°C
I
CC
- the “MOV” instruction can update a register with un-predictable data.
Power Supply Current
Power-down Mode
Parameter
WDT disabled, V
WDT disabled, V
WDT enabled, V
WDT enabled, V
Condition
CC
CC
CC
CC
= 5 V
= 3 V
= 5 V
= 3 V
AT90CAN32/64/128
Min.
Typ.
Max.
150
120
50
40
Max.
µA
µA
µA
µA
419