AT90CAN64 Atmel Corporation, AT90CAN64 Datasheet - Page 164
AT90CAN64
Manufacturer Part Number
AT90CAN64
Description
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
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14.11.1
164
AT90CAN32/64/128
General Timer/Counter Control Register – GTCCR
Figure 14-14. Timer/Counter2 Crystal Oscillator Connections
A external clock can also be used using TOSC1 as input. Setting AS2 and EXCLK enables this
configuration.
Figure 14-15. Timer/Counter2 External Clock Connections
For Timer/Counter2, the possible prescaled selections are: clk
clk
Setting the PSR2 bit in GTCCR resets the prescaler. This allows the user to operate with a pre-
dictable prescaler.
• Bit 1 – PSR2: Prescaler Reset Timer/Counter2
When this bit is one, the Timer/Counter2 prescaler will be reset. This bit is normally cleared
immediately by hardware. If the bit is written when Timer/Counter2 is operating in asynchronous
mode, the bit will remain one until the prescaler has been reset. The bit will not be cleared by
hardware if the TSM bit is set. Refer to the description of the
chronization Mode” on page 98
Bit
Read/Write
Initial Value
T2S
/128, clk
TSM
R/W
T2S
7
0
/256, and clk
R
6
–
0
T2S
for a description of the Timer/Counter Synchronization mode.
R
5
–
0
/1024. Additionally, clk
External
32.768 KHz
Signal
Clock
12 - 22 pF
12 - 22 pF
NC
R
4
–
0
R
3
–
0
T2S
R
2
–
0
as well as 0 (stop) may be selected.
TOSC2
TOSC1
“Bit 7 – TSM: Timer/Counter Syn-
TOSC2
TOSC1
GND
PSR2
R/W
1
0
T2S
/8, clk
PSR310
R/W
0
0
T2S
GTCCR
/32, clk
7679H–CAN–08/08
T2S
/64,
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