SAM3U2E Atmel Corporation, SAM3U2E Datasheet - Page 730
SAM3U2E
Manufacturer Part Number
SAM3U2E
Description
Manufacturer
Atmel Corporation
Specifications of SAM3U2E
Flash (kbytes)
128 Kbytes
Pin Count
144
Max. Operating Frequency
96 MHz
Cpu
Cortex-M3
# Of Touch Channels
57
Hardware Qtouch Acquisition
No
Max I/o Pins
96
Ext Interrupts
96
Usb Transceiver
1
Quadrature Decoder Channels
1
Usb Speed
Hi-Speed
Usb Interface
Device
Spi
5
Twi (i2c)
2
Uart
5
Ssc
1
Sd / Emmc
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
16
Adc Resolution (bits)
12
Adc Speed (ksps)
384
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
36
Self Program Memory
YES
External Bus Interface
1
Dram Memory
No
Nand Interface
Yes
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8/3.3
Operating Voltage (vcc)
1.62 to 3.6
Fpu
No
Mpu / Mmu
Yes / No
Timers
3
Output Compare Channels
3
Input Capture Channels
3
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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35.7.8.7
35.7.9
35.7.9.1
Figure 35-40. Normal Mode Configuration
35.7.9.2
Figure 35-41. Automatic Echo Mode Configuration
730
730
WRITE BUFFER
DATA 0
DATA N
|
|
|
|
SAM3U Series
SAM3U Series
Test Modes
Receiver Timeout
Normal Mode
Automatic Echo Mode
(Peripheral) DMA
Controller
reception but only a low level. However, this low level must be present on the slave select line
(NSS) at least 1 Tbit before the first serial clock cycle corresponding to the MSB bit.
Because the receiver baudrate clock is active only during data transfers in SPI Mode, a receiver
timeout is impossible in this mode, whatever the Time-out value is (field TO) in the Time-out
Register (US_RTOR).
The USART can be programmed to operate in three different test modes. The internal loopback
capability allows on-board diagnostics. In the loopback mode the USART interface pins are dis-
connected or not and reconfigured for loopback internally or externally.
Normal mode connects the RXD pin on the receiver input and the transmitter output on the TXD
pin.
Automatic echo mode allows bit-by-bit retransmission. When a bit is received on the RXD pin, it
is sent to the TXD pin, as shown in
the TXD pin. The RXD pin is still connected to the receiver input, thus the receiver remains
active.
APB bus
TXRDY
Transmitter
Transmitter
Receiver
Receiver
LIN CONTROLLER
USART3
Figure
READ BUFFER
DATA N
DATA 0
|
|
|
|
35-41. Programming the transmitter has no effect on
RXD
TXD
RXD
TXD
(Peripheral) DMA
Controller
APB bus
RXRDY
6430E–ATARM–29-Aug-11
6430E–ATARM–29-Aug-11
NACT = SUBSCRIBE
LIN CONTROLLER
USART3
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