SAM9G15 Atmel Corporation, SAM9G15 Datasheet - Page 554
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SAM9G15
Manufacturer Part Number
SAM9G15
Description
Manufacturer
Atmel Corporation
Datasheets
1.SAM9261.pdf
(248 pages)
2.SAM9261.pdf
(1274 pages)
3.SAM9261.pdf
(43 pages)
4.SAM9G15.pdf
(1211 pages)
5.SAM9G15.pdf
(45 pages)
Specifications of SAM9G15
Flash (kbytes)
0 Kbytes
Pin Count
217
Max. Operating Frequency
400 MHz
Cpu
ARM926
Hardware Qtouch Acquisition
No
Max I/o Pins
105
Ext Interrupts
105
Usb Transceiver
3
Usb Speed
Hi-Speed
Usb Interface
Host, Device
Spi
2
Twi (i2c)
3
Uart
6
Lin
4
Ssc
1
Sd / Emmc
2
Graphic Lcd
Yes
Video Decoder
No
Camera Interface
No
Adc Channels
12
Adc Resolution (bits)
10
Adc Speed (ksps)
440
Resistive Touch Screen
Yes
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
32
Self Program Memory
NO
External Bus Interface
1
Dram Memory
DDR2/LPDDR, SDRAM/LPSDR
Nand Interface
Yes
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8/3.3
Operating Voltage (vcc)
0.9 to 1.1
Fpu
No
Mpu / Mmu
No/Yes
Timers
6
Output Compare Channels
6
Input Capture Channels
6
Pwm Channels
4
32khz Rtc
Yes
Calibrated Rc Oscillator
No
- SAM9261 PDF datasheet
- SAM9261 PDF datasheet #2
- SAM9261 PDF datasheet #3
- SAM9G15 PDF datasheet #4
- SAM9G15 PDF datasheet #5
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- Download datasheet (30Mb)
33.6.9.7
33.6.9.8
554
554
SAM9G35
SAM9G35
Isochronous IN
High Bandwidth Isochronous Endpoint Handling: IN Example
Isochronous-IN is used to transmit a stream of data whose timing is implied by the delivery rate.
Isochronous transfer provides periodic, continuous communication between host and device.
It guarantees bandwidth and low latencies appropriate for telephony, audio, video, etc.
If the endpoint is not available (TX_PK_RDY = 0), then the device does not answer to the host.
An ERR_FL_ISO interrupt is generated in the UDPHS_EPTSTAx register and once enabled,
then sent to the CPU.
The STALL_SNT command bit is not used for an ISO-IN endpoint.
For high bandwidth isochronous endpoints, the DMA can be programmed with the number of
transactions (BUFF_LENGTH field in UDPHS_DMACONTROLx) and the system should provide
the required number of packets per microframe, otherwise, the host will notice a sequencing
problem.
A response should be made to the first token IN recognized inside a microframe under the fol-
lowing conditions:
At the end of a microframe in which at least one data bank has been transmitted, if less than
NB_TRANS banks have been validated for that microframe, an error condition is flagged
(ERR_TRANS is set in UDPHS_EPTSTAx).
Cases of Error (in UDPHS_EPTSTAx)
• If at least one bank has been validated, the correct DATAx corresponding to the programmed
• If no bank is validated yet, the default DATA0 ZLP is answered and underflow is flagged
• If no data bank has been validated at the time when a response should be made for the
• If no data bank has been validated at the time when a response should be made for the last
• If at the end of a microframe no valid token IN has been recognized, no data bank is flushed
• ERR_FL_ISO: There was no data to transmit inside a microframe, so a ZLP is answered by
Number Of Transactions per Microframe (NB_TRANS) should be answered. In case of a
subsequent missed or corrupted token IN inside the microframe, the USB 2.0 Core available
data bank(s) that should normally have been transmitted during that microframe shall be
flushed at its end. If this flush occurs, an error condition is flagged (ERR_FLUSH is set in
UDPHS_EPTSTAx).
(ERR_FL_ISO is set in UDPHS_EPTSTAx). Then, no data bank is flushed at microframe
end.
second transaction of NB_TRANS = 3 transactions microframe, a DATA1 ZLP is answered
and underflow is flagged (ERR_FL_ISO is set in UDPHS_EPTSTAx). If and only if remaining
untransmitted banks for that microframe are available at its end, they are flushed and an error
condition is flagged (ERR_FLUSH is set in UDPHS_EPTSTAx).
programmed transaction of a microframe, a DATA0 ZLP is answered and underflow is flagged
(ERR_FL_ISO is set in UDPHS_EPTSTAx). If and only if the remaining untransmitted data
bank for that microframe is available at its end, it is flushed and an error condition is flagged
(ERR_FLUSH is set in UDPHS_EPTSTAx).
and no error condition is reported.
default.
11053B–ATARM–22-Sep-11
11053B–ATARM–22-Sep-11
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