ATxmega128A3U Atmel Corporation, ATxmega128A3U Datasheet - Page 235
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ATxmega128A3U
Manufacturer Part Number
ATxmega128A3U
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega128A3U
Flash (kbytes)
128 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)
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
7
Output Compare Channels
22
Input Capture Channels
22
Pwm Channels
22
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATxmega128A3U-AU
Manufacturer:
ATMEL
Quantity:
39
Company:
Part Number:
ATxmega128A3U-MH
Manufacturer:
ATMEL
Quantity:
1
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8331A–AVR–07/11
Figure 20-4. OUT transaction state machine
The USB module then fetches the endpoint DATAPTR, and waits for a DATA0 or DATA1
packet. If a PID error or any other PID than DATA0 or DATA1 is detected, the USB module
returns to idle and waits for the next token packet.
If STALL in endpoint CTRL is set, the incoming data is discarded. If the endpoint is not isochro-
nous, a STALL handshake is returned to the host, the STALL flag in endpoint STATUS, and
STALLIF in INTFLAGSACLR/SET are set.
For isochronous endpoints, data from both a DATA0 and DATA1 packet will be accepted. For
other endpoint types, the PID is checked against TOGGLE. If they don't match, the incoming
data is discarded, and a NAK handshake is returned to the host. If BUSNACK0 is set, the incom-
ing data is discarded. The Overflow Flag (OVF) in endpoint STATUS and Overflow Interrupt Flag
(OVFIF) in INTFLAGSASET/CLR are set. If the endpoint is not isochronous, a NAK handshake
is returned to the host.
The incoming data is written to the data buffer pointed to by DATAPTR. If a bit-stuff error is
detected in the incoming data, the USB module returns to idle and waits for the next token
packet. If the number of received data bytes exceeds the maximum data payload specified by
SIZE, the remainders of the received data bytes are discarded. The packet will still be checked
for bit-stuff and CRC errors. If there was a bit-stuff or CRC error in the packet, the USB module
returns to idle and waits for the next token packet.
STATUS MANAGEMENT
ACK HANDSHAKE
CRC OK ?
No
No
No
RAM FETCH IN CONFIGURATION TABLE
RAM FETCH IN CONFIGURATION TABLE
ENDPOINT STATUS ENABLED ?
ENDPOINT FIELD =< MAXEP ?
ADDRESS MATCH OK ?
DATA : CTRL & STATUS
DATA : DATAPTR L &H
DIR : OUT ENDPOINT
DIR : OUT ENDPOINT
IDLE
Yes
Yes
Yes
OUT token
WRITE STATUS
DATA WRITE
MORE DATA ?
OK/BAD
IN RAM
Atmel AVR XMEGA AU
No
ISO
Stall & ISO
NAK HANDSHAKE
STALL HANDSHAKE
DISCARDED
WAIT DATA0/1
DATA
PID OK ?
Yes
Stall
No
No
ACK HANDSHAKE
WRITE STATUS
PID & TOGGLE
BIT STUFF OK ?
DATA WRITE
CRC OK ?
MATCH ?
OK/BAD
IN RAM
Yes
!Stall
235
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