ATxmega128B1 Atmel Corporation, ATxmega128B1 Datasheet - Page 22

• 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

4.6
4.7
4.8
4.8.1
8291A–AVR–10/11
Internal SRAM
EEPROM
I/O Memory
General Purpose I/O Registers
Figure 4-2.
I/O memory, EEPROM, and SRAM will always have the same start addresses for all XMEGA devices.
The internal SRAM always starts at hexadecimal address 0x2000. SRAM is accessed by the
CPU using the load (LD/LDS/LDD) and store (ST/STS/STD) instructions.
XMEGA devices have EEPROM for nonvolatile data storage. It is addressable in a separate
data space (default) or memory mapped and accessed in normal data space. The EEPROM
supports both byte and page access. Memory mapped EEPROM allows highly efficient
EEPROM reading and EEPROM buffer loading. When doing this, EEPROM is accessible using
load and store instructions. Memory mapped EEPROM will always start at hexadecimal address
0x1000.
The status and configuration registers for peripherals and modules, including the CPU, are
addressable through I/O memory locations. All I/O locations can be accessed by the load
(LD/LDS/LDD) and store (ST/STS/STD) instructions, which are used to transfer data between
the 32 registers in the register file and the I/O memory. The IN and OUT instructions can
address I/O memory locations in the range of 0x00 0x3F directly. In the address range 0x00 -
0x1F, single-cycle instructions for manipulation and checking of individual bits are available.
The lowest 4 I/O memory addresses are reserved as general purpose I/O registers. These regis-
ters can be used for storing global variables and flags, as they are directly bit-accessible using
the SBI, CBI, SBIS, and SBIC instructions.
Data memory map.
Start/End
Address
0x0000
0x1000
0x2000
Internal SRAM
Data Memory
I/O Memory
EEPROM
(Up to 4 KB)
(Up to 4 KB)
(Up to 8 KB)
Atmel AVR XMEGA B
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