SAM9G10 Atmel Corporation, SAM9G10 Datasheet - Page 549
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SAM9G10
Manufacturer Part Number
SAM9G10
Description
Manufacturer
Atmel Corporation
Datasheets
1.SAM9261.pdf
(1274 pages)
2.SAM9261.pdf
(43 pages)
3.SAM9G10.pdf
(750 pages)
4.SAM9G10.pdf
(39 pages)
Specifications of SAM9G10
Flash (kbytes)
0 Kbytes
Pin Count
217
Max. Operating Frequency
266 MHz
Cpu
ARM926
Hardware Qtouch Acquisition
No
Max I/o Pins
96
Ext Interrupts
96
Usb Transceiver
3
Usb Speed
Full Speed
Usb Interface
Host, Device
Spi
2
Twi (i2c)
1
Uart
4
Ssc
3
Sd / Emmc
1
Graphic Lcd
Yes
Video Decoder
No
Camera Interface
No
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
16
Self Program Memory
NO
External Bus Interface
1
Dram Memory
sdram
Nand Interface
Yes
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8/3.3
Operating Voltage (vcc)
1.08 to 1.32
Fpu
No
Mpu / Mmu
No/Yes
Timers
3
Output Compare Channels
3
Input Capture Channels
3
32khz Rtc
Yes
Calibrated Rc Oscillator
No
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Figure 33-8. NYET Example with Two Endpoint Banks
33.6.9.3
33.6.9.4
33.6.9.5
11053B–ATARM–22-Sep-11
11053B–ATARM–22-Sep-11
t = 0
data 0 ACK
Data IN
Bulk IN or Interrupt IN
Bulk IN or Interrupt IN: Sending a Packet Under Application Control (Device to Host)
Bank 1
Bank 0
t = 125 μs
E
F
Data IN packets are sent by the device during the data or the status stage of a control transfer or
during an (interrupt/bulk/isochronous) IN transfer. Data buffers are sent packet by packet under
the control of the application or under the control of the DMA channel.
There are three ways for an application to transfer a buffer in several packets over the USB:
The application can write one or several banks.
A simple algorithm can be used by the application to send packets regardless of the number of
banks associated to the endpoint.
Algorithm Description for Each Packet:
The application is notified that it is possible to write a new packet to the DPR by the
TX_PK_RDY interrupt. This interrupt can be enabled or masked by setting the TX_PK_RDY bit
in the UDPHS_EPTCTLENB/UDPHS_EPTCTLDIS register.
Algorithm Description to Fill Several Packets:
Using the previous algorithm, the application is interrupted for each packet. It is possible to
reduce the application overhead by writing linearly several banks at the same time. The
AUTO_VALID bit in the UDPHS_EPTCTLx must be set by writing the AUTO_VALID bit in the
UDPHS_EPTCTLENBx register.
The auto-valid-bank mechanism allows the transfer of data (IN and OUT) without the interven-
tion of the CPU. This means that bank validation (set TX_PK_RDY or clear the RX_BK_RDY bit)
is done by hardware.
• packet by packet (see
•
• DMA (see
• The application waits for TX_PK_RDY flag to be cleared in the UDPHS_EPTSTAx register
• The application writes one USB packet of data in the DPR through the
• The application sets TX_PK_RDY flag in the UDPHS_EPTSETSTAx register.
data 1 NYET
64
before it can perform a write access to the DPR.
memory window.
KB (see
Bank 1
Bank 0
t = 250 μs
E'
F
33.6.9.6
33.6.9.5
Bank 1
Bank 0
PING ACK
F
E
below)
below)
33.6.9.5
t = 375 μs
Bank 1
Bank 0
data 0 NYET
below)
F
E
Bank 1
Bank 0
t = 500 μs
F
F
PING NACK
Bank 1
Bank 0
E'
F
t = 625 μs
Bank 1
Bank 0
PING ACK
E
F
64
E: empty
E': begin to empty
F: full
KB endpoint logical
SAM9G35
SAM9G35
549
549
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