ATxmega64A1 Atmel Corporation, ATxmega64A1 Datasheet - Page 197
ATxmega64A1
Manufacturer Part Number
ATxmega64A1
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega64A1
Flash (kbytes)
64 Kbytes
Pin Count
100
Max. Operating Frequency
32 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
78
Ext Interrupts
78
Usb Speed
No
Usb Interface
No
Spi
12
Twi (i2c)
4
Uart
8
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
16
Adc Resolution (bits)
12
Adc Speed (ksps)
2000
Analog Comparators
4
Resistive Touch Screen
No
Dac Channels
4
Dac Resolution (bits)
12
Temp. Sensor
Yes
Crypto Engine
AES/DES
Sram (kbytes)
4
Eeprom (bytes)
2048
Self Program Memory
YES
External Bus Interface
1
Dram Memory
sdram
Nand Interface
No
Picopower
Yes
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.6 to 3.6
Operating Voltage (vcc)
1.6 to 3.6
Fpu
No
Mpu / Mmu
no / no
Timers
8
Output Compare Channels
24
Input Capture Channels
24
Pwm Channels
24
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATxmega64A1-AU
Manufacturer:
Atmel
Quantity:
135
Company:
Part Number:
ATxmega64A1U-AU
Manufacturer:
ATMEL
Quantity:
953
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18. RTC32 - 32-bit Real Time Counter
18.1
18.2
Features
Overview
•
•
•
•
•
•
•
The 32-bit Real Time Counter is a 32-bit counter, counting reference clock cycles and giving an
event and/or an interrupt request when it reaches a configurable compare and/or top value. The
reference clock is generated from a high accuracy 32.768 kHz crystal, and the design is opti-
mized for low power consumption. The Real Time Counter (RTC) typically operates in low power
sleep modes, keeping track of time and waking up the device at regular intervals.
The RTC input clock can be taken from a 1.024 kHz or 1 Hz prescaled output from the 32.768
kHz reference clock. The RTC will give a compare interrupt request and/or event when the coun-
ter value equals the Compare register value. The RTC will give an overflow interrupt request
and/or event when the counter value equals the Period register value. Counter overflow will also
reset the counter value to zero.
The RTC can generate both compare and overflow interrupt request and/or events.
Figure 18-1. 32-bit Real Time Counter Overview
32-bit resolution
Selectable clock reference
One Compare register
One Period register
Clear Timer on overflow
Optional Interrupt/ Event on overflow and compare match
Isolated V
– 1.024 kHz
– 1 Hz
BAT
power domain with dynamic switch over from/to V
1.024 kHz
1 Hz
32-bit Compare
32-bit Counter
=
=
32-bit Period
Overflow
Compare Match
CC
power domain
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