ATxmega128B1 Atmel Corporation, ATxmega128B1 Datasheet - Page 153

• Manufacturer Part Number: ATxmega128B1
• Manufacturer: Atmel Corporation

Specifications of ATxmega128B1

• 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: 53
• Ext Interrupts: 53
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 3
• Twi (i2c): 1
• Uart: 2
• Segment Lcd: 160
• 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
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 8
• 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: 3
• Output Compare Channels: 10
• Input Capture Channels: 10
• Pwm Channels: 10
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

13.3
8291A–AVR–10/11
Block Diagram
“compare channels.” When used for capture operations, the CC channels are referred to as
“capture channels.”
Figure 13-2 on page 153
extensions.
Figure 13-2. Timer/counter block diagram.
The counter register (CNT), period registers with buffer (PER and PERBUF), and compare and
capture registers with buffers (CCx and CCxBUF) are 16-bit registers. All buffer register have a
buffer valid (BV) flag that indicates when the buffer contains a new value.
During normal operation, the counter value is continuously compared to zero and the period
(PER) value to determine whether the counter has reached TOP or BOTTOM.
The counter value is also compared to the CCx registers. These comparisons can be used to
generate interrupt requests, request DMA transactions or generate events for the event system.
The waveform generator modes use these comparisons to set the waveform period or pulse
width.
Base Counter
Compare/Capture
(Unit x = {A,B,C,D})
BV
BV
Counter
PERBUF
CCBUFx
PER
CNT
CCx
shows a detailed block diagram of the timer/counter without the
=
= 0
=
CTRLA
CTRLD
"count"
"clear"
"load"
"direction"
"match"
TOP
BOTTOM
Atmel AVR XMEGA B
Clock Select
Event
Select
Control Logic
Control Logic
Generation
Waveform
OVF/UNF
(INT/DMA Req.)
ERRIF
(INT Req.)
OCx Out
CCxIF
(INT/DMA
Req.)
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