SAM7S161 Atmel Corporation, SAM7S161 Datasheet - Page 502

• Manufacturer Part Number: SAM7S161
• Manufacturer: Atmel Corporation

Specifications of SAM7S161

• Flash (kbytes): 16 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 55 MHz
• Cpu: ARM7TDMI
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 32
• Ext Interrupts: 32
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Twi (i2c): 1
• Uart: 3
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 384
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 4
• Self Program Memory: NO
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 1.8/3.3
• Operating Voltage (vcc): 3.0 to 3.6
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Output Compare Channels: 3
• Input Capture Channels: 3
• Pwm Channels: 4
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: No

35.5
35.5.1
Figure 35-3. Example of USB V2.0 Full-speed Communication Control
The Control Transfer endpoint EP0 is always used when a USB device is first configured (USB v. 2.0 specifications).
35.5.1.1
Table 35-2.
35.5.1.2
502
Transfer
Control
Isochronous
Interrupt
Bulk
Functional Description
SAM7S Series
USB V2.0 Full-speed Introduction
USB V2.0 Full-speed Transfer Types
USB Bus Transactions
USB Communication Flow
Unidirectional
Unidirectional
Unidirectional
Bidirectional
Direction
Software Client
USB Host V2.0
The USB V2.0 full-speed provides communication services between host and attached USB
devices. Each device is offered with a collection of communication flows (pipes) associated with
each endpoint. Software on the host communicates with a USB device through a set of commu-
nication flows.
A communication flow is carried over one of four transfer types defined by the USB device.
Each transfer results in one or more transactions over the USB bus. There are three kinds of
transactions flowing across the bus in packets:
1. Setup Transaction
2. Data IN Transaction
3. Data OUT Transaction
Not guaranteed
Not guaranteed
Not guaranteed
Guaranteed
Bandwidth
Data Flow: Control Transfer
Data Flow: Isochronous or Bulk In Transfer
Data Flow: Isochronous or Bulk Out Transfer
Supported Endpoint Size
8, 16, 32, 64
8, 16, 32, 64
USB Device endpoint configuration requires that
in the first instance Control Transfer must be EP0.
≤ 64
64
EP0
EP1
EP2
Error Detection
USB Device 2.0
Yes
Yes
Yes
Yes
6175L–ATARM–28-Jul-11
Automatic
Retrying
Yes
Yes
No