ATxmega16A4 Atmel Corporation, ATxmega16A4 Datasheet - Page 358
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ATxmega16A4
Manufacturer Part Number
ATxmega16A4
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega16A4
Flash (kbytes)
16 Kbytes
Pin Count
44
Max. Operating Frequency
32 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
34
Ext Interrupts
34
Usb Speed
No
Usb Interface
No
Spi
7
Twi (i2c)
2
Uart
5
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
12
Adc Resolution (bits)
12
Adc Speed (ksps)
2000
Analog Comparators
2
Resistive Touch Screen
No
Dac Channels
2
Dac Resolution (bits)
12
Temp. Sensor
Yes
Crypto Engine
AES/DES
Sram (kbytes)
3.3
Eeprom (bytes)
1024
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
5
Output Compare Channels
16
Input Capture Channels
16
Pwm Channels
16
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATxmega16A4U-AU
Manufacturer:
SAMSUNG
Quantity:
514
Part Number:
ATxmega16A4U-AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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29.6.3
29.6.4
8077H–AVR–12/09
Repeat Counter Register
Operand Count Register
itself. Indirect data access can be optionally combined with pointer register post-increment. The
indirect access mode has an option that makes it possible to load or read the pointer register
without accessing any other registers. Any register update is performed in a little-endian fashion.
Hence, loading a single byte of the address register will always update the LSB byte while the
MSB bytes are left unchanged.
The Pointer Register is not involved in addressing registers in the PDI Control and Status Regis-
ter Space (CSRS space).
The REPEAT instruction will always be accompanied by one or more operand bytes that define
the number of times the next instruction should be repeated. These operand bytes are copied
into the Repeat Counter register upon reception. During the repeated executions of the instruc-
tion following immediately after the REPEAT instruction and its operands, the Repeat Counter
register is decremented until it reaches zero, indicating that all repetitions are completed. The
repeat counter is also involved in key reception.
Immediately after and instruction (except the LDCS and the STCS instructions) a specified num-
ber of operands or data bytes (given by the size parts of the instruction) are expected. The
operand count register is used to keep track of how many bytes that have been transferred.
XMEGA A
358
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