ATxmega128B1 Atmel Corporation, ATxmega128B1 Datasheet - Page 3

• 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

2. Overview
8291A–AVR–10/11
The AVR XMEGA B microcontrollers is a family of low-power, high-performance, and peripheral-
rich CMOS 8/16-bit microcontrollers based on the AVR enhanced RISC architecture. By execut-
ing powerful instructions in a single clock cycle, the Atmel AVR XMEGA B devices achieve
throughputs approaching one million instructions per second (MIPS) per megahertz, allowing the
system designer to optimize power consumption versus processing speed.
The AVR CPU combines a rich instruction set with 32 general purpose working registers. All 32
registers are directly connected to the arithmetic logic unit (ALU), allowing two independent reg-
isters to be accessed in a single instruction, executed in one clock cycle. The resulting
architecture is more code efficient while achieving throughputs many times faster than conven-
tional single-accumulator or CISC based microcontrollers.
The Atmel AVR XMEGA B devices provide the following features: in-system programmable flash
with read-while-write capabilities; internal EEPROM and SRAM; two-channel DMA controller;
four-channel event system and programmable multilevel interrupt controller; up to 53 general
purpose I/O lines; 16-bit real-time counter (RTC); up to three flexible 16-bit timer/counters with
capture, compare and PWM modes; up to two USARTs; one I
wire serial interface (TWI); one full-speed USB 2.0 interface; one serial peripheral interface
(SPI); one LCD controller supporting display capacity up to 4 Common and up to 40 Segment
terminals; CRC module; AES and DES cryptographic engine; up to two 8-channel, 12-bit ADCs
with programmable gain; up to four analog comparators with window mode; programmable
watchdog timer with separate internal oscillator; accurate internal oscillators with PLL and pres-
caler; and programmable brown-out detection.
The program and debug interface (PDI), a fast, two-pin interface for programming and debug-
ging, is available. Selected devices also have an IEEE std. 1149.1 compliant JTAG interface,
and this can also be used for on-chip debug and programming.
The Atmel AVR XMEGA devices have five software selectable power saving modes. The idle
mode stops the CPU while allowing the SRAM, DMA controller, event system, interrupt control-
ler, and all peripherals to continue functioning. The power-down mode saves the SRAM and
register contents, but stops the oscillators, disabling all other functions until the next TWI, USB
resume, or pin-change interrupt, or reset. In power-save mode, the asynchronous real-time
counter continues to run, allowing the application to maintain a timer base while the rest of the
device is sleeping. In this mode, the LCD controller is allowed to refresh data to the panel. In
standby mode, the external crystal oscillator keeps running while the rest of the device is sleep-
ing. This allows very fast startup from the external crystal, combined with low power
consumption. In extended standby mode, both the main oscillator and the asynchronous timer
continue to run. In this mode, the LCD controller is allowed to refresh data to the panel. To fur-
ther reduce power consumption, the peripheral clock to each individual peripheral can optionally
be stopped in active mode and idle sleep mode.
The devices are manufactured using Atmel high-density, nonvolatile memory technology. The
program flash memory can be reprogrammed in-system through the PDI or JTAG interfaces. A
boot loader running in the device can use any interface to download the application program to
the flash memory. The boot loader software in the boot flash section will continue to run while
the application flash section is updated, providing true read-while-write operation. By combining
an 8/16-bit RISC CPU with In-system, self-programmable flash, the Atmel AVR XMEGA is a
powerful microcontroller family that provides a highly flexible and cost effective solution for many
embedded applications.
Atmel AVR XMEGA B
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C and SMBUS compatible two-
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