ATXMEGA256A3B-MH Atmel, ATXMEGA256A3B-MH Datasheet - Page 331

• Manufacturer Part Number: ATXMEGA256A3B-MH
• Description: MCU AVR 256KB FLASH A3B 64-QFN
• Manufacturer: Atmel
• Series: AVR® XMEGAr

Specifications of ATXMEGA256A3B-MH

• Core Processor: AVR
• Core Size: 8/16-Bit
• Speed: 32MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, DMA, POR, PWM, WDT
• Number Of I /o: 49
• Program Memory Size: 256KB (128K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 4K x 8
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.6 V ~ 3.6 V
• Data Converters: A/D 16x12b; D/A 2x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-MLF®, 64-QFN
• Processor Series: ATXMEGA256x
• Core: AVR8
• Data Bus Width: 8 bit, 16 bit
• Data Ram Size: 16 KB
• Interface Type: I2C, SPI, USART
• Maximum Clock Frequency: 32 MHz
• Number Of Programmable I/os: 49
• Number Of Timers: 7
• Operating Supply Voltage: 1.6 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 8 Channel
• On-chip Dac: 12 bit, 2 Channel
• For Use With: ATAVRONEKIT - KIT AVR/AVR32 DEBUGGER/PROGRMMRATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: ATXMEGA256A3B-MU; ATXMEGA256A3B-MU

27.7
27.8
27.9
27.9.1
8077H–AVR–12/09
Input hysteresis
Power consumption vs. propagation delay
Register Description
ACnCTRL – Analog Comparator n Control Register
Figure 27-2. Analog Comparator Window Mode
Application software can select between no, low, and high hysteresis. Adding hysteresis can
avoid constant toggling of the output if the input signals are very close to each other and some
noise exists in either of the signals or in the system.
It is possible to enable High-speed mode to get the shortest possible propagation delay. This
mode consumes more power than the default Low-power mode that has a longer propagation
delay.
• Bits 7:6 - INTMODE[1:0]:Analog Comparator Interrupt Modes
These bits configure the interrupt mode for Analog Comparator n according to
Table 27-1.
Bit
+0x00 / +0x01
Read/Write
Initial Value
INTMODE[1:0]
U p p e r lim it o f w in d o w
In p u t s ig n a l
L o w e r lim it o f w in d o w
00
01
10
11
R/W
Analog Comparator n Interrupt Settings
7
0
INTMODE[1:0]
Group Configuration
R/W
6
0
BOTHEDGES
FALLING
RISING
-
R/W
5
0
INTLVL[1:0]
+
+
-
-
A C 0
A C 1
R/W
4
0
Comparator interrupt on output toggle
Comparator interrupt or event on rising output edge
Description
Reserved
Comparator interrupt or event on falling output edge
HSMODE
R/W
3
0
s e n s itiv ity
R/W
In te rru p t
2
0
HYSMODE[2:0]
c o n tro l
R/W
1
0
XMEGA A
In te rru p ts
Table
E v e n ts
ENABLE
R/W
0
0
27-1.
ACnCTRL
331