SAM3U4E Atmel Corporation, SAM3U4E Datasheet - Page 955
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SAM3U4E
Manufacturer Part Number
SAM3U4E
Description
Manufacturer
Atmel Corporation
Specifications of SAM3U4E
Flash (kbytes)
256 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)
50
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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39.6.2
Table 39-3.
39.6.3
Table 39-4.
Notes:
6430E–ATARM–29-Aug-11
6430E–ATARM–29-Aug-11
Transfer
Control
Isochronous
Interrupt
Bulk
CONTROL
(bidirectional)
IN
(device toward host)
OUT
(host toward device)
1. Control transfer must use endpoints with one bank and can be aborted using a stall handshake.
2. Isochronous transfers must use endpoints configured with two or three banks.
USB V2.0 High Speed Transfer Types
USB Transfer Event Definitions
USB Communication Flow
USB Transfer Events
Control Transfers
Bulk IN Transfer
Interrupt IN Transfer
Isochronous IN Transfer
Bulk OUT Transfer
Interrupt OUT Transfer
Isochronous OUT Transfer
A communication flow is carried over one of four transfer types defined by the USB device.
A device provides several logical communication pipes with the host. To each logical pipe is
associated an endpoint. Transfer through a pipe belongs to one of the four transfer types:
As indicated below, transfers are sequential events carried out on the USB bus.
Endpoints must be configured according to the transfer type they handle.
A transfer is composed of one or several transactions;
An endpoint handles all transactions related to the type of transfer for which it has been
configured.
Unidirectional
Unidirectional
Unidirectional
Bidirectional
• Control Transfers: Used to configure a device at attach time and can be used for other device-
• Bulk Data Transfers: Generated or consumed in relatively large burst quantities and have
• Interrupt Data Transfers: Used for timely but reliable delivery of data, for example, characters
• Isochronous Data Transfers: Occupy a prenegotiated amount of USB bandwidth with a
Direction
specific purposes, including control of other pipes on the device.
wide dynamic latitude in transmission constraints.
or coordinates with human-perceptible echo or feedback response characteristics.
prenegotiated delivery latency. (Also called streaming real time transfers.)
(1)
(2)
(2)
Not guaranteed
Not guaranteed
Not guaranteed
Guaranteed
Bandwidth
• Setup transaction
• Setup transaction
• Setup transaction
• Data IN transaction
• Data IN transaction
• Data IN transaction
• Data OUT transaction
• Data OUT transaction
• Data OUT transaction
→
→
→
→
→
→
Endpoint Size
Data IN transactions ∅Status OUT transaction
Data OUT transactions ∅Status IN transaction
Status IN transaction
8, 16, 32, 64
→
Data IN transaction
Data IN transaction
Data IN transaction
→
→
8-1024
8-1024
Data OUT transaction
8-512
Data OUT transaction
Data OUT transaction
Error Detection
SAM3U Series
SAM3U Series
Yes
Yes
Yes
Yes
Automatic
Retrying
Yes
Yes
No
955
955
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