ATxmega256A3U Atmel Corporation, ATxmega256A3U Datasheet - Page 80

• Manufacturer Part Number: ATxmega256A3U
• Manufacturer: Atmel Corporation

Specifications of ATxmega256A3U

• Flash (kbytes): 256 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 32 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 50
• Ext Interrupts: 50
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 10
• Twi (i2c): 2
• Uart: 7
• 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
• Dac Channels: 2
• Dac Resolution (bits): 12
• Temp. Sensor: Yes
• Crypto Engine: AES/DES
• Sram (kbytes): 16
• Eeprom (bytes): 4096
• 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: 7
• Output Compare Channels: 22
• Input Capture Channels: 22
• Pwm Channels: 22
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

35.16 Two-Wire Interface Characteristics
Table 35-24. Two Wire Serial Bus Characteristics
8386A–AVR–07/11
Symbol
V
V
V
V
t
t
t
I
C
f
R
t
t
t
t
r
of
SP
I
SCL
HD;STA
LOW
HIGH
SU;STA
IH
IL
hys
OL
I
P
Parameter
Input High Voltage
Input Low Voltage
Hysteresis of Schmitt Trigger Inputs
Output Low Voltage
Rise Time for both SDA and SCL
Output Fall Time from V
Spikes Suppressed by Input Filter
Input Current for each I/O Pin
Capacitance for each I/O Pin
SCL Clock Frequency
Value of Pull-up resistor
Hold Time (repeated) START condition
Low Period of SCL Clock
High Period of SCL Clock
Set-up time for a repeated START condition
Table 2-1 describes the requirements for devices connected to the Two Wire Serial Bus. The
XMEGA Two-Wire Interface meets or exceeds these requirements under the noted conditions.
Timing symbols refer to
Figure 35-6. Two-Wire Interface Bus Timing
SDA
SCL
IHmin
t
SU;STA
to V
ILmax
t
HD;STA
t
of
Figure
3mA, sink current
0.1V
10pF < C
f
f
f
f
f
f
f
f
f
f
f
PER
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
SCL
(3)
≤ 100kHz
> 100kHz
≤ 100kHz
> 100kHz
≤ 100kHz
> 100kHz
≤ 100kHz
> 100kHz
≤ 100kHz
> 100kHz
CC
35-6.
>max(10f
< V
Condition
b
< 400pF
I
< 0.9V
t
HIGH
t
HD;DAT
SCL
, 250kHz)
CC
(2)
t
LOW
20+0.1C
20+0.1C
V
----------------------------
0.05V
t
CC
SU;DAT
0.7V
3mA
Min
-10
0.5
4.0
0.6
4.7
1.3
4.0
0.6
–
0
0
0
0.4V
CC
CC
b
b
(1)(2)
(1)(2)
(1)
300ms
---------------- -
t
Typ
r
XMEGA A3U
C
b
V
0.3*V
CC
Max
300
250
400
t
0.4
50
10
10
SU;STO
+0.5
t
BUF
CC
Unit
kHz
µA
pF
ns
µs
Ω
V
s
80