ATxmega128A1 Atmel Corporation, ATxmega128A1 Datasheet - Page 173

• Manufacturer Part Number: ATxmega128A1
• Manufacturer: Atmel Corporation

Specifications of ATxmega128A1

• Flash (kbytes): 128 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): 8
• 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

14.12.15 PERL - Period Register L
14.12.16 CCxH - Compare or Capture Register n H
14.12.17 CCxL - Compare or Capture Register n L
14.12.18 PERBUFH - Timer/Counter Period Buffer H
8077H–AVR–12/09
• Bit 7:0 - PER[7:0]
These bits holds the 8 LSB of the 16-bit Period register.
The CCxH and CCxL register pair represents the 16-bit value CCx.
These 16-bit registers have two functions dependent of mode of operation. For capture opera-
tion these registers constitute the second buffer level and access point for the CPU and DMA.
For compare operation these registers are all continuously compared to the counter value. Nor-
mally the outputs form the comparators are then used for generating waveforms.
CCx are updated with the buffer value from the corresponding CCxBUF register when an
UPDATE condition occurs.
• Bit 7:0 - CCx[15:8]
These bits holds the 8 MSB of the 16-bit Compare or Capture register.
• Bit 7:0 - CCx[7:0]
These bits holds the 8 LSB of the 16-bit Compare or Capture register.
The PERBUFH and PERBUFL register pair represents the 16-bit value PERBUF. This 16-bit
register serves as the buffer for the period register (PER). Accessing this register using CPU or
DMA will affect the PERBUFV flag.
Bit
Read/Write
Initial Value
Bit
Read/Write
Initial Value
Bit
+0x26
Read/Write
Initial Value
R/W
R/W
R/W
7
0
7
1
7
0
R/W
R/W
R/W
6
0
6
1
6
0
R/W
R/W
R/W
5
0
5
1
5
0
R/W
R/W
R/W
4
0
4
1
4
0
CCx[7:0]
CCx[15:8]
PER[7:0]
R/W
R/W
R/W
3
0
3
1
3
0
R/W
R/W
R/W
2
0
2
1
2
0
R/W
R/W
R/W
1
0
1
1
1
0
XMEGA A
R/W
R/W
R/W
0
0
0
1
0
0
CCxH
CCxL
PERL
173