ATxmega32D4 Atmel Corporation, ATxmega32D4 Datasheet - Page 261
![no-image](/images/manufacturer_photos/0/0/79/atmel_corporation_sml.jpg)
ATxmega32D4
Manufacturer Part Number
ATxmega32D4
Description
Manufacturer
Atmel Corporation
Specifications of ATxmega32D4
Flash (kbytes)
32 Kbytes
Pin Count
44
Max. Operating Frequency
32 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
34
Ext Interrupts
34
Usb Speed
No
Usb Interface
No
Spi
4
Twi (i2c)
2
Uart
2
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
12
Adc Resolution (bits)
12
Adc Speed (ksps)
200
Analog Comparators
2
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
4
Eeprom (bytes)
1024
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
4
Output Compare Channels
14
Input Capture Channels
14
Pwm Channels
14
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATxmega32D4-AU
Manufacturer:
Atmel
Quantity:
123
Part Number:
ATxmega32D4-AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
ATxmega32D4-CU
Manufacturer:
Maxim
Quantity:
71
Company:
Part Number:
ATxmega32D4-MH
Manufacturer:
Atmel
Quantity:
1 910
Company:
Part Number:
ATxmega32D4-MH
Manufacturer:
Atmel
Quantity:
1 704
Part Number:
ATxmega32D4-MH
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
22.3.3.1
22.3.4
22.3.5
8210B–AVR–04/10
Serial transmission and reception
Serial Transmission
Characters
Three different characters, DATA, BREAK and IDLE, are used. The BREAK character is equal
to 12 bit-length of low level. The IDLE character is equal to 12 bit-length of high level. Both the
BREAK and the IDLE character can be extended beyond the bit-length of 12.
Figure 22-5. Characters and timing for the PDI Physical.
The PDI physical layer is either in Transmit (TX) or Receive (RX) mode of operation. By default
it is in RX mode, waiting for a start bit.
The programmer and the PDI operate synchronously on the PDI_CLK provided by the program-
mer. The dependency between the clock edges and data sampling or data change is fixed. As
illustrated in
is always set up (changed) on the falling edge of PDI_CLK, while data is always sampled on the
rising edge of PDI_CLK.
Figure 22-6. Changing and sampling of data.
When a data transmission is initiated (by the PDI Controller), the transmitter simply shifts the
start bit, data bits, the parity bit, and the two stop bits out on the PDI_DATA line. The transmis-
sion speed is dictated by the PDI_CLK signal. While in transmission mode, IDLE bits (high bits)
are automatically transmitted to fill possible gaps between successive DATA characters. If a col-
lision is detected during transmission, the output driver is disabled and the interface is put into a
RX mode waiting for a BREAK character.
Figure 22-6 on page
PD I_DATA
PDI_CLK
START
0
1
261, output data (either from the programmer or from the PDI)
2
Sam ple
3
1 BREAK character
1 DATA character
1 IDLE character
BREAK
4
IDLE
5
6
Sam ple
7
P
STOP
Sam ple
XMEGA D
261