AT43USB355_06 datasheet(32/115 Pages) ATMEL

32 / 115 page

AT43USB355

2603G–USB–04/06

USB End-point

Interrupt Sources

An assertion or activation of one or more bits in the end-point's Control and Status Register

triggers the end-point interrupts. These triggers are different for control and non-control end-

points as described in the table below. Please refer to the Control and Status Register for

more information.

USB Interrupt Status Register – UISR

• Bit 7 – SOF INT: Start of Frame Interrupt

This bit is asserted after the USB hardware receives a valid SOF packet.

• Bit 6 – EOF2 INT: EOF2 Interrupt

This bit is asserted 10 clocks before the expected start of a frame.

• Bit 5 – Res: Reserved Bit

This bit is reserved and always reads as zero.

• Bit 4 – FEP3 INT: Function End-point 3 Interrupt

• Bit 3 – HEP0 INT: Hub End-point 0 Interrupt

• Bit 2 – FEP2 INT: Function End-point 2 Interrupt

• Bit 1 – FEP1 INT: Function End-point 1 Interrupt

• Bit 0 – FEP0 INT: Function End-point 0 Interrupt

The hub and function interrupt bits will be set by the hardware whenever the following bits in

the corresponding end-point's Control and Status Register are modified by the USB hardware:

RX OUT Packet is set (control and OUT end-points)

TX Packet Ready is cleared AND TX Complete is set (control and IN end-points)

RX SETUP is set (control end-points only)

TX Complete is set

Table 10. USB End-point Interrupt Sources

Bit

End-point type

RX_OUT_PACKET

CONTROL, OUT

TX_COMPLETE

CONTROL, IN

STALL_SENT

CONTROL, IN

RX_SETUP

CONTROL

Bit

$1FF7

SOF INT

EOF2 INT

–

FE3 INT

HEP0 INT

FE2 INT

FE1 INT

FE0 INT

UISR

Read/Write

Initial Value

AT43USB355 датащи(PDF) 32 Page - ATMEL Corporation

AT43USB355 датащи(HTML) 32 Page - ATMEL Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL