AT32UC3A4256 Atmel Corporation, AT32UC3A4256 Datasheet - Page 570
AT32UC3A4256
Manufacturer Part Number
AT32UC3A4256
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT32UC3A0128.pdf
(377 pages)
2.AT32UC3A0128.pdf
(33 pages)
3.AT32UC3A0128.pdf
(159 pages)
4.AT32UC3A3128.pdf
(91 pages)
5.AT32UC3A3128.pdf
(1012 pages)
Specifications of AT32UC3A4256
Flash (kbytes)
256 Kbytes
Pin Count
100
Max. Operating Frequency
66 MHz
Cpu
32-bit AVR
Hardware Qtouch Acquisition
No
Usb Transceiver
1
Usb Speed
Hi-Speed
Usb Interface
Device + OTG
Spi
6
Twi (i2c)
2
Uart
4
Ssc
1
Sd / Emmc
2
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
128
Self Program Memory
YES
Dram Memory
No
Nand Interface
Yes
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
3.0 to 3.6
Operating Voltage (vcc)
3.0 to 3.6
Fpu
No
Mpu / Mmu
Yes / No
Timers
6
Output Compare Channels
6
Input Capture Channels
6
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AT32UC3A4256S-C1UR
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
AT32UC3A4256S-U
Manufacturer:
ST
Quantity:
79
Part Number:
AT32UC3A4256S-U
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
- AT32UC3A0128 PDF datasheet
- AT32UC3A0128 PDF datasheet #2
- AT32UC3A0128 PDF datasheet #3
- AT32UC3A3128 PDF datasheet #4
- AT32UC3A3128 PDF datasheet #5
- Current page: 570 of 1012
- Download datasheet (16Mb)
25.6.7
32072G–11/2011
Modem Mode
Figure 25-36. Example of RTS Drive with Timeguard Enabled
The USART features a modem mode, supporting asynchronous communication with the follow-
ing signal pins: Data Terminal Ready (DTR), Data Set Ready (DSR), Request to Send (RTS),
Clear to Send (CTS), Data Carrier Detect (DCD), and Ring Indicator (RI). Writing 0x3 to
MR.MODE enables this mode, and the USART will behave as a Data Terminal Equipment
(DTE), controlling DTR and RTS, whilst detecting level changes on DSR, DCD, CTS, and RI.
Table 25-12
connections.
Table 25-12. Circuit References
The DTR pin is controlled by writing a one to the DTR enable and disable bits (DTREN,
DTRDIS) in CR. It is low when enabled, and high when disabled. The RTS pin is controlled
automatically.
Detected level changes can trigger interrupts, and are reported by the respective Input Change
bits (RIIC, DSRIC, DCDIC, and CTSIC) in CSR. These status bit are automatically cleared when
CSR is read. When the CTS pin goes high, the USART will wait for the transmitter to complete
any ongoing character transmission before automatically disabling it.
USART Pin
TXD
RTS
DTR
RXD
CTS
DSR
DCD
RI
shows USART signal pins with the corresponding standardized modem
Baud Rate
TXEMPTY
TXRDY
Clock
Write
V24
2
4
20
3
5
6
8
22
THR
TXD
RTS
Start
Bit
D0
D1
CCITT
103
105
108.2
104
106
107
109
125
D2
D3
D4
D5
D6
D7
Direction
From terminal to modem
From terminal to modem
From terminal to modem
From modem to terminal
From terminal to modem
From terminal to modem
From terminal to modem
From terminal to modem
Parity
Bit
Stop
Bit
TG = 4
570
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