AT90CAN64 Atmel Corporation, AT90CAN64 Datasheet - Page 368

• 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

26.4
368
Maximum Speed vs. V
AT90CAN32/64/128
Table 26-1.
Maximum frequency is depending on V
vs. V
given voltage in this interval, use this equation:
To calculate required voltage for a given frequency, use this equation:
Table 26-2.
At 3 Volt, this gives:
Thus, when V
At 8 MHz this gives:
Thus, a maximum frequency of 8 MHz requires V
Figure 26-2. Maximum Frequency vs. V
Symbol
t
t
t
Δ
CLCX
CLCH
CHCL
t
CLCL
CC
curve is linear between 1.8V < V
2.7 < VCC < 4.5 or 8 < Frequency < 16
CC
Voltage and Frequency range
Parameter
Low Time
Rise Time
Fall Time
Change in period from one clock cycle
to the next
16 MHz
CC
External Clock Drive (Continued)
Constants used to calculate maximum speed vs. V
8 MHz
= 3V, maximum frequency will be 9.33 MHz.
Frequency
Voltage
Frequency
Frequency
2.7V
Voltage
=
=
1.8
------- -
------- -
1.8
8
=
8
=
•
a
b
•
CC
(
Safe Operating Area
•
•
(
8 8
CC
3 2.7
CC
. As shown in Figure 26-2., the Maximum Frequency
(
(
–
V Vx
F Fy
–
, AT90CAN32/64/128
< 4.5V. To calculate the maximum frequency at a
–
–
)
+
)
2.7
)
)
+
CC
+
+
V
8
Min.
4.5V
Fy
Vx
CC
50
= 2.7V.
=
=
2.7
= 2.7 - 5.5V
9.33
8/1.8
a
Max.
1.6
1.6
2
5.5V
CC
1.8/8
b
V
Min.
CC
25
= 4.5 - 5.5V
Voltage
2.7
Vx
Max.
0.5
0.5
2
7679H–CAN–08/08
Units
Fy
8
ns
μs
μs
%