ATxmega192D3 Atmel Corporation, ATxmega192D3 Datasheet - Page 171
ATxmega192D3
Manufacturer Part Number
ATxmega192D3
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega192D3
Flash (kbytes)
192 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 Speed
No
Usb Interface
No
Spi
5
Twi (i2c)
2
Uart
3
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
16
Adc Resolution (bits)
12
Adc Speed (ksps)
200
Analog Comparators
2
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
16
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
18
Input Capture Channels
18
Pwm Channels
18
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
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Part Number
Manufacturer
Quantity
Price
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ATxmega192D3-AU
Manufacturer:
CYPRESS
Quantity:
101
Company:
Part Number:
ATxmega192D3-AU
Manufacturer:
ATMEL
Quantity:
70
Company:
Part Number:
ATxmega192D3-H
Manufacturer:
SQ
Quantity:
719
Company:
Part Number:
ATxmega192D3-MH
Manufacturer:
Atmel
Quantity:
565
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16.3.1
16.3.2
8210B–AVR–04/10
Electrical Characteristics
START and STOP Conditions
Figure 16-2. Basic TWI Transaction Diagram Topology
The master provides the clock signal for the transaction, but a device connected to the bus is
allowed to stretch the low level period of the clock to decrease the clock speed.
The TWI in XMEGA follows the electrical specifications and timing of I
specifications are not 100% compliant so to ensure correct behavior the inactive bus timeout
period should be set in TWI master mode.
Two unique bus conditions are used for marking the beginning (START) and end (STOP) of a
transaction. The master issues a START condition(S) by indicating a high to low transition on the
SDA line while the SCL line is kept high. The master completes the transaction by issuing a
STOP condition (P), indicated by a low to high transition on the SDA line while SCL line is kept
high.
Figure 16-3. START and STOP Conditions
Multiple START conditions can be issued during a single transaction. A START condition not
directly following a STOP condition, are named a Repeated START condition (Sr).
SDA
SCL
SDA
SCL
S
The slave provides data on the bus
The master provides data on the bus
The master or slave can provide data on the bus
S
Condition
START
ADDRESS
ADDRESS
S
6 ... 0
Address Packet
R/W
R/W
A
Direction
ACK
Transaction
Data Packet #0
DATA
DATA
7 ... 0
ACK
A
Data Packet #1
DATA
7 ... 0
DATA
2
C and SMBus. These
ACK/NACK
XMEGA D
Condition
A/A
STOP
P
P
P
171
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