ATxmega64B3 Atmel Corporation, ATxmega64B3 Datasheet - Page 186

• Manufacturer Part Number: ATxmega64B3
• Manufacturer: Atmel Corporation

Specifications of ATxmega64B3

• Flash (kbytes): 64 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 36
• Ext Interrupts: 36
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Segment Lcd: 100
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 12
• Adc Speed (ksps): 2000
• Analog Comparators: 2
• Resistive Touch Screen: No
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 4
• Eeprom (bytes): 2048
• Self Program Memory: YES
• Dram Memory: No
• 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: 2
• Output Compare Channels: 6
• Input Capture Channels: 6
• Pwm Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

14.10.10 HCNT – High-byte Count register
14.10.11 LPER – Low-byte Period register
14.10.12 HPER – High-byte Period register
14.10.13 LCMPx – Low-byte Compare register x
8291A–AVR–10/11
• Bit 7:0 – HCNT[7:0]
HCNT contains the eight-bit counter value for the high-byte timer/counter. The CPU and DMA
write accesses have priority over count, clear, or reload of the counter.
• Bit 7:0 – LPER[7:0]
LPER contains the eight-bit period value for the low-byte timer/counter.
• Bit 7:0 – HPER[7:0]
HPER contains the eight-bit period for the high-byte timer/counter.
• Bit 7:0 – LCMPx[7:0], x=[A, B, C, D]
LCMPx contains the eight-bit compare value for the low-byte timer/counter.
These registers are all continuously compared to the counter value. Normally, the outputs from
the comparators are then used for generating waveforms.
Bit
Read/Write
Initial Value
Bit
+0x21
Read/Write
Initial Value
Bit
+0x27
Read/Write
Initial Value
Bit
+0x26
Read/Write
Initial Value
R/W
R/W
R/W
R/W
7
0
7
0
7
0
7
0
R/W
R/W
R/W
R/W
6
0
6
0
6
0
6
0
R/W
R/W
R/W
R/W
5
0
5
0
5
0
5
0
R/W
R/W
R/W
R/W
4
0
4
0
4
0
4
0
LPER[7:0]
HCNT[7:0]
LCMPx[7:0]
HPER[7:0]
R/W
R/W
R/W
R/W
3
0
3
0
3
0
3
0
Atmel AVR XMEGA B
R/W
R/W
R/W
R/W
2
0
2
0
2
0
2
0
R/W
R/W
R/W
R/W
1
0
1
0
1
0
1
0
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
LCMPx
HCNT
LPER
HPER
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