ATxmega32D4 Atmel Corporation, ATxmega32D4 Datasheet - Page 216

• Manufacturer Part Number: ATxmega32D4
• 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

18.14.5
8210B–AVR–04/10
CTRLC - USART Control Register C
become effective until ongoing and pending transmissions are completed, i.e., when the Trans-
mit Shift Register and Transmit Buffer Register do not contain data to be transmitted. When
disabled, the Transmitter will no longer override the TxD port.
• Bit 2 - CLK2X: Double Transmission Speed
Writing this bit to one will reduce the divisor of the baud rate divider from16 to 8 effectively dou-
bling the transfer rate for asynchronous communication modes. For synchronous operation this
bit has no effect and should always be written to zero. This bit must be zero when the USART
Communication Mode is configured to IRCOM.
This bit is unused in Master SPI mode of operation.
• Bit 1 - MPCM: Multi-processor Communication Mode
This bit enables the Multi-processor Communication mode. When the MPCM bit is written to
one, the USART Receiver ignores all the incoming frames that do not contain address informa-
tion. The Transmitter is unaffected by the MPCM setting. For more detailed information see
”Multi-processor Communication Mode” on page
This bit is unused in Master SPI mode of operation.
• Bit 0 - TXB8: Transmit Bit 8
TXB8 is the ninth data bit in the character to be transmitted when operating with serial frames
with nine data bits. When used this bit must be written before writing the low bits to DATA.
This bit is unused in Master SPI mode of operation.
Note:
• Bits 7:6 - CMODE[1:0]: USART Communication Mode
These bits select the mode of operation of the USART as shown in
Table 18-6.
1.
2.
Bit
+0x05
+0x05
Read/Write
Initial Value
(1)
CMODE[1:0]
1. Master SPI mode
See
See
00
01
10
11
7
”IRCOM - IR Communication Module” on page 220
”USART” on page 199
CMODE bit settings
R/W
0
CMODE[1:0]
CMODE[1:0]
6
Group Configuration
R/W
ASYNCHRONOUS
0
SYNCHRONOUS
IRCOM
MSPI
for full description of the Master SPI Mode (MSPIM) operation
5
R/W
–
0
PMODE[1:0]
4
R/W
Mode
Asynchronous USART
Synchronous USART
IRCOM
Master SPI
–
0
212.
3
(1)
SBMODE
R/W
(2)
–
0
for full description on using IRCOM mode.
2
UDORD
Table
R/W
1
18-6.
1
CHSIZE[2:0]
XMEGA D
UCPHA
R/W
1
0
R/W
–
0
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