Atmel Evaluation Kit AT91SAM9G25-EK AT91SAM9G25-EK Data Sheet

533

SAM9G25 [DATASHEET]

11032C–ATARM–25-Jan-13

In Suspend mode, a resume event on the USB bus line is detected asynchronously, transceiver and clocks disabled
(however the pull-up should not be removed).

Once the resume is detected on the bus, the signal WAKE_UP in the UDPHS_INTSTA is set. It may generate an
interrupt if the corresponding bit in the UDPHS_IEN register is set. This interrupt may be used to wake-up the core,
enable PLL and main oscillators and configure clocks. 

In Suspend State it is possible to wake-up the host by sending an external resume. 

The device waits at least 5 ms after being entered in Suspend State before sending an external resume.

The device must force a K state from 1 to 15 ms to resume the host.

A device must support the TEST_MODE feature when in the Default, Address or Configured High Speed device 

states.

TEST_MODE can be:

z

Test_J

z

Test_K

z

Test_Packet

z

Test_SEO_NAK

 for definitions of each test mode.)

const char test_packet_buffer[] = {

  0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,                // JKJKJKJK * 9

  0xAA,0xAA,0xAA,0xAA,0xAA,0xAA,0xAA,0xAA,                     // JJKKJJKK * 8

  0xEE,0xEE,0xEE,0xEE,0xEE,0xEE,0xEE,0xEE,                     // JJKKJJKK * 8

  0xFE,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF, // 

JJJJJJJKKKKKKK * 8

  0x7F,0xBF,0xDF,0xEF,0xF7,0xFB,0xFD,                          // JJJJJJJK * 8

  0xFC,0x7E,0xBF,0xDF,0xEF,0xF7,0xFB,0xFD,0x7E                 // {JKKKKKKK * 

10}, JK

};