AT90CAN32 Automotive Atmel Corporation, AT90CAN32 Automotive Datasheet - Page 368

• Manufacturer Part Number: AT90CAN32 Automotive
• Manufacturer: Atmel Corporation

Specifications of AT90CAN32 Automotive

• Flash (kbytes): 32 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): 2
• Eeprom (bytes): 1024
• Self Program Memory: YES
• 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: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

27.4
368
Maximum Speed vs. V
AT90CAN32/64/128
Table 27-1.
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 27-2.
At 3 Volt, this gives:
Thus, when V
At 8 MHz this gives:
Thus, a maximum frequency of 8 MHz requires V
Symbol
1/t
t
t
t
t
t
∆
CLCL
CHCX
CLCX
CLCH
CHCL
t
CLCL
CLCL
CC
curve is linear between 1.8V < V
2.7 < VCC < 4.5 or 8 < Frequency < 16
CC
Voltage and Frequency range
Parameter
Oscillator Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
Change in period from one clock cycle
to the next
CC
External Clock Drive
Constants used to calculate maximum speed vs. V
= 3V, maximum frequency will be 9.33 MHz.
Frequency
Voltage
Frequency
Voltage
=
=
1.8
------- -
------- -
1.8
8
=
8
=
•
a
b
•
CC
(
•
•
(
8 8
3 2.7
CC
. As shown in Figure 27-2., the Maximum Frequency
(
(
–
V Vx
F Fy
–
< 4.5V. To calculate the maximum frequency at a
–
–
)
+
)
2.7
)
)
+
CC
+
+
V
8
Min.
125
Fy
Vx
CC
50
50
= 2.7V.
=
0
=
2.7
= 2.7 - 5.5V
9.33
8/1.8
a
Max.
1.6
1.6
8
2
CC
1.8/8
b
V
Min.
62.5
CC
25
25
0
= 4.5 - 5.5V
2.7
Vx
Max.
0.5
0.5
16
7682C–AUTO–04/08
2
Units
Fy
MHz
8
ns
ns
ns
µs
µs
%