ATxmega64A1 Atmel Corporation, ATxmega64A1 Datasheet - Page 172

• Manufacturer Part Number: ATxmega64A1
• 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

14.12.12 CNTH - Counter Register H
14.12.13 CNTL - Counter Register L
14.12.14 PERH - Period Register H
8077H–AVR–12/09
For more details refer to
The CNTH and CNTL register pair represents the 16-bit value CNT. CNT contains the 16-bit
counter value in the Timer/Counter. The CPU and DMA write access has priority over count,
clear, or reload of the counter.
For more details on reading and writing 16-bit register refer to
page
• Bit 7:0 - CNT[15:8]
These bits holds the 8 MSB of the 16-bit Counter register.
• Bit 7:0 - CNT[7:0]
These bits holds the 8 LSB of the 16-bit Counter register.
The PERH and PERL register pair represents the 16-bit value PER. PER contains the 16-bit
TOP value in the Timer/Counter.
• Bit 7:0 - PER[15:8]
These bits holds the 8 MSB of the 16-bit Period register.
Bit
+0x0F
Read/Write
Initial Value
Bit
+0x21
Read/Write
Initial Value
Bit
+0x20
Read/Write
Initial Value
Bit
+0x27
Read/Write
Initial Value
12.
R/W
R/W
R/W
R/W
7
0
7
1
7
0
7
0
R/W
R/W
R/W
R/W
6
0
6
1
Section 3.11 ”Accessing 16-bits Registers” on page
6
0
6
0
R/W
R/W
R/W
R/W
5
0
5
1
5
0
5
0
R/W
R/W
R/W
R/W
4
0
4
1
4
0
4
0
TEMP[7:0]
PER[15:8]
CNT[15:8]
CNT[7:0]
R/W
R/W
R/W
R/W
3
0
3
1
3
0
3
0
R/W
R/W
R/W
R/W
2
0
2
1
2
0
2
0
”Accessing 16-bits Registers” on
R/W
R/W
R/W
R/W
1
0
1
1
1
0
1
0
12.
XMEGA A
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
1
TEMP
CNTH
PERH
CNTL
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