ATxmega64A4U Atmel Corporation, ATxmega64A4U Datasheet - Page 15
ATxmega64A4U
Manufacturer Part Number
ATxmega64A4U
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega64A4U
Flash (kbytes)
64 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 Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
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)
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
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:
ATxmega64A4U-AU
Manufacturer:
ON
Quantity:
29 000
Company:
Part Number:
ATxmega64A4U-U
Manufacturer:
ATMEL
Quantity:
74
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3.14.4
3.14.5
3.14.6
8331A–AVR–07/11
RAMPY – Extended Y-Pointer Register
RAMPZ – Extended Z-Pointer Register
EIND – Extended Indirect Register
• Bit 7:0 – RAMPX[7:0]: Extended X-pointer Address bits
These bits hold the MSB of the 24-bit address created by RAMPX and the 16-bit X-register. Only
the number of bits required to address the available data memory is implemented for each
device. Unused bits will always read as zero.
This register is concatenated with the Y-register for indirect addressing (LD/LDD/ST/STD) of the
whole data memory space on devices with more than 64KB of data memory. This register is not
available if the data memory, including external memory, is less than 64KB.
• Bit 7:0 – RAMPY[7:0]: Extended Y-pointer Address bits
These bits hold the MSB of the 24-bit address created by RAMPY and the 16-bit Y-register. Only
the number of bits required to address the available data memory is implemented for each
device. Unused bits will always read as zero.
This register is concatenated with the Z-register for indirect addressing (LD/LDD/ST/STD) of the
whole data memory space on devices with more than 64KB of data memory. RAMPZ is concat-
enated with the Z-register when reading (ELPM) program memory locations above the first 64KB
and writing (SPM) program memory locations above the first 128KB of the program memory.
This register is not available if the data memory, including external memory and program mem-
ory in the device, is less than 64KB.
• Bit 7:0 – RAMPZ[7:0]: Extended Z-pointer Address bits
These bits hold the MSB of the 24-bit address created by RAMPZ and the 16-bit Z-register. Only
the number of bits required to address the available data and program memory is implemented
for each device. Unused bits will always read as zero.
This register is concatenated with the Z-register for enabling extended indirect jump (EIJMP)
and call (EICALL) to the whole program memory space on devices with more than 128KB of pro-
gram memory. The register should be used for jumps to addresses below 128KB if
Bit
+0x0B
Read/Write
Initial Value
Bit
+0x0A
Read/Write
Initial Value
Bit
+0x09
Read/Write
Initial Value
R/W
R/W
R/W
7
0
7
0
7
0
R/W
R/W
R/W
6
0
6
0
6
0
R/W
R/W
R/W
5
0
5
0
5
0
R/W
R/W
R/W
4
0
4
0
4
0
RAMPX[7:0]
RAMPY[7:0]
RAMPZ[7:0]
R/W
R/W
R/W
Atmel AVR XMEGA AU
3
0
3
0
3
0
R/W
R/W
R/W
2
0
2
0
2
0
R/W
R/W
R/W
1
0
1
0
1
0
R/W
R/W
R/W
0
0
0
0
0
0
RAMPX
RAMPY
RAMPZ
15
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