AT32UC3B164 Atmel Corporation, AT32UC3B164 Datasheet - Page 304
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AT32UC3B164
Manufacturer Part Number
AT32UC3B164
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT32UC3A0128.pdf
(377 pages)
2.AT32UC3A0128.pdf
(33 pages)
3.AT32UC3A0128.pdf
(159 pages)
4.AT32UC3B0128.pdf
(684 pages)
5.AT32UC3B0128.pdf
(107 pages)
Specifications of AT32UC3B164
Flash (kbytes)
64 Kbytes
Pin Count
48
Max. Operating Frequency
60 MHz
Cpu
32-bit AVR
# Of Touch Channels
32
Hardware Qtouch Acquisition
No
Max I/o Pins
28
Ext Interrupts
28
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
3
Twi (i2c)
1
Uart
2
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
6
Adc Resolution (bits)
10
Adc Speed (ksps)
384
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
16
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
3.0-3.6 or (1.65-1.95+3.0-3.6)
Operating Voltage (vcc)
3.0-3.6 or (1.65-1.95+3.0-3.6)
Fpu
No
Mpu / Mmu
Yes / No
Timers
10
Output Compare Channels
16
Input Capture Channels
6
Pwm Channels
13
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AT32UC3B164-Z1UT
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
- AT32UC3A0128 PDF datasheet
- AT32UC3A0128 PDF datasheet #2
- AT32UC3A0128 PDF datasheet #3
- AT32UC3B0128 PDF datasheet #4
- AT32UC3B0128 PDF datasheet #5
- Current page: 304 of 684
- Download datasheet (11Mb)
21.6.3
21.6.4
21.6.4.1
32059L–AVR32–01/2012
Receiver and Transmitter Control
Synchronous and Asynchronous Modes
Transmitter Operations
After a reset, the transceiver is disabled. The receiver/transmitter is enabled by writing a one to
either the Receiver Enable, or Transmitter Enable bit in the Control Register (CR.RXEN, or
CR.TXEN). They may be enabled together and can be configured both before and after they
have been enabled. The user can reset the USART receiver/transmitter at any time by writing a
one to either the Reset Receiver (CR.RSTRX), or Reset Transmitter (CR.RSTTX) bit. This soft-
ware reset clears status bits and resets internal state machines, immediately halting any
communication. The user interface configuration registers will retain their values.
The user can disable the receiver/transmitter by writing a one to either the Receiver Disable, or
Transmitter Disable bit (CR.RXDIS, or CR.TXDIS). If the receiver is disabled during a character
reception, the USART will wait for the current character to be received before disabling. If the
transmitter is disabled during transmission, the USART will wait until both the current character
and the character stored in the Transmitter Holding Register (THR) are transmitted before dis-
abling. If a timeguard has been implemented it will remain functional during the transaction.
The transmitter performs equally in both synchronous and asynchronous operating modes
(MR.SYNC). One start bit, up to 9 data bits, an optional parity bit, and up to two stop bits are
successively shifted out on the TXD pin at each falling edge of the serial clock. The number of
data bits is selected by the Character Length field (MR.CHRL) and the MR.MODE9 bit. Nine bits
are selected by writing a one to MODE9, overriding any value in CHRL. The parity bit configura-
tion is selected in the MR.PAR field. The Most Significant Bit First bit (MR.MSBF) selects which
data bit to send first. The number of stop bits is selected by the MR.NBSTOP field. The 1.5 stop
bit configuration is only supported in asynchronous mode.
Figure 21-5. Character Transmit
The characters are sent by writing to the Character to be Transmitted field (THR.TXCHR). The
transmitter reports status with the Transmitter Ready (TXRDY) and Transmitter Empty
(TXEMPTY) bits in the Channel Status Register (CSR). TXRDY is set when THR is empty.
TXEMPTY is set when both THR and the transmit shift register are empty (transmission com-
plete). Both TXRDY and TXEMPTY are cleared when the transmitter is disabled. Writing a
character to THR while TXRDY is zero has no effect and the written character will be lost.
Baud Rate
Example: 8-bit, Parity Enabled One Stop
Clock
TXD
Start
Bit
D0
D1
D2
D3
D4
D5
D6
D7
Parity
Bit
Stop
Bit
304
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