ATxmega128A3U Atmel Corporation, ATxmega128A3U Datasheet - Page 418
![no-image](/images/manufacturer_photos/0/0/79/atmel_corporation_sml.jpg)
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
- Current page: 418 of 505
- Download datasheet (8Mb)
32.4.7
32.5
8331A–AVR–07/11
PDI Controller
Serial Reception
If the PDI is in TX- mode (as a response to an LD instruction), but no transmission request from
the PDI controller is pending when the TAP controller enters the capture DR state, a DELAY
byte (0xDB) will be loaded into the shift register, and the parity bit will be set (forcing a parity
error) when data is shifted out in the shift DR state. This situation occurs during data transmis-
sion if the data to be transmitted is not yet available.
Figure 32-13 on page 418
response to the repeated indirect LD instruction. In this example, the device is not able to return
data bytes faster than one valid byte per two transmitted frames. Thus, intermediate DELAY
characters are inserted.
Figure 32-13. Data not ready marking.
If a DELAY data frame is transmitted as a response to an LD instruction, the programmer should
interpret this as if the JTAG interface had no data ready for transmission in the previous capture
DR state. The programmer must initiate repeated transfers until a valid data byte is received.
The LD instruction is defined to return a specified number of valid frames, not just a number of
frames. Hence, if the programmer detects a DELAY character after transmitting an LD instruc-
tion, the LD instruction should not be retransmitted, because the first LD response would still be
pending.
During reception, the PDI collects the eight data bits and the parity bit from TDI and shifts them
into the shift register. Every time a valid frame is received, the data is latched in to the update
DR state.
The parity checker calculates the parity (even mode) of the data bits in incoming frames and
compares the result with the parity bit from the serial frame. In case of a parity error, the PDI
controller is signaled.
The parity checker is active in both TX and RXmodes. If a parity error is detected, the received
data byte is evaluated and compared with the BREAK character (which will always generate a
parity error). In case the BREAK character is recognized, the PDI controller is signaled.
The PDI controller performs data transmission/reception on a byte level, command decoding,
high-level direction control, control and status register access, exception handling, and clock
switching (PDI_CLK or TCK). The interaction between an external programmer and the PDI con-
troller is based on a scheme where the programmer transmits various types of requests to the
PDI controller, which in turn responds according to the specific request. A programmer request
comes in the form of an instruction, which may be followed by one or more byte operands. The
PDI controller response may be silent (e.g., a data byte is stored to a location within the device),
or it may involve data being returned to the programmer (e.g., a data byte is read from a location
within the device).
Programmer
External
Commands/data
Device
FRAME 0
REP
shows an uninterrupted flow of data frames from the PDI as a
FRAME 1
CNT
LD *(ptr)
FRAME 2
Atmel AVR XMEGA AU
0xDB 1
FRAME 0
FRAME 1
D0
P 0xDB 1
FRAME 2
FRAME 3
D1
P
418
Related parts for ATxmega128A3U
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![U641B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
![U4082B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
![U4089B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
![U4255BM-M](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
![U4089B-P](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
![TDA4470](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
![ATF22V10B-25PC](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet:
![AT89C51ED2-IM](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
8-bit Flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
![AT24C01](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
2-Wire Serial EEPROM
Manufacturer:
ATMEL Corporation
Datasheet:
![U6046B](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
U6046BREAR WINDOW HEATING TIMER / LONG-TERM TIMER
Manufacturer:
ATMEL Corporation
Datasheet: