ATxmega128D4 Atmel Corporation, ATxmega128D4 Datasheet - Page 124
ATxmega128D4
Manufacturer Part Number
ATxmega128D4
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega128D4
Flash (kbytes)
128 Kbytes
Pin Count
44
Max. Operating Frequency
32 MHz
Cpu
8-bit AVR
Hardware Qtouch Acquisition
No
Max I/o Pins
34
Ext Interrupts
34
Usb Speed
No
Usb Interface
No
Spi
4
Twi (i2c)
2
Uart
2
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
12
Adc Resolution (bits)
12
Adc Speed (ksps)
200
Analog Comparators
2
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
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
4
Output Compare Channels
14
Input Capture Channels
14
Pwm Channels
14
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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8210B–AVR–04/10
Figure 12-2. Timer/Counter Block Diagram
The Counter Register (CNT), the Period Registers w/buffer (PER and PERBUF), and the com-
pare and Capture registers w/buffers (CCx and CCxBUF) are 16-bit registers.
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 comparators can be used to
generate interrupt requests. They also generate events for the Event System. The waveform
generator modes use the comparators to set the waveform period or pulse width.
A prescaled peripheral clock and events from the Event System can be used for controlling the
counter. The Event System is also used as source to the input capture. Combined with the
Quadrature Decoding functionality in the Event System QDEC, the Timer/Counter can be used
for high speed Quadrature Decoding.
Bus Bridge
Base Counter
Compare/Capture
(x = {A,B,C,D})
Counter
V
V
TEMP
PERBUF
CCxBUF
PER
CNT
CCx
A
=
I/O Data Bus (8-bit)
B
= 0
C
CTRL
D
=
Event Select
Clock Select
E
CKSEL
EVSEL
"count"
"clear"
"load"
"direction"
"capture"
"match"
TOP
BOTTOM
G
Control Logic
Control Logic
INTCTRL
Generation
A
Waveform
B
INTFLAGS
XMEGA D
OVF/UNF
(INT Req.)
ERRIF
(INT Req.)
OCx Out
CCxIF
(INT Req.)
124
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