AT90CAN64 Atmel Corporation, AT90CAN64 Datasheet - Page 164

• 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

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,