Cypress CY7C68013 User Manual

CY7C68013
Document #: 38-08012 Rev. *A Page 9 of 48
3.7.2 USB-Interrupt Autovectors
The main USB interrupt is shared by 27 interrupt sources. To save the code and processing time that normally would be required
to identify the individual USB interrupt source, the FX2 provides a second level of interrupt vectoring, called Autovectoring. When
a USB interrupt is asserted, the FX2 pushes the program counter onto its stack then jumps to address 0x0043, where it expects
to find a “jump” instruction to the USB Interrupt service routine.
The FX2 jump instruction is encoded as follows.
If Autovectoring is enabled (AV2EN = 1 in the INTSETUP register), the FX2 substitutes its INT2VEC byte. Therefore, if the high
byte (“page”) of a jump-table address is preloaded at location 0x0044, the automatically-inserted INT2VEC byte at 0x0045 will
direct the jump to the correct address out of the 27 addresses within the page.
Table 3-2. INT2 USB Interrupts
USB INTERRUPT TABLE FOR INT2
Priority INT2VEC Value Source Notes
1 00 SUDAV SETUP Data Available
2 04 SOF Start of Frame (or microframe)
3 08 SUTOK Setup Token Received
4 0C SUSPEND USB Suspend request
5 10 USB RESET Bus reset
6 14 HISPEED Entered high speed operation
7 18 EP0ACK FX2 ACK’d the CONTROL Handshake
8 1C reserved
9 20 EP0-IN EP0-IN ready to be loaded with data
10 24 EP0-OUT EP0-OUT has USB data
11 28 EP1-IN EP1-IN ready to be loaded with data
12 2C EP1-OUT EP1-OUT has USB data
13 30 EP2 IN: buffer available. OUT: buffer has data
14 34 EP4 IN: buffer available. OUT: buffer has data
15 38 EP6 IN: buffer available. OUT: buffer has data
16 3C EP8 IN: buffer available. OUT: buffer has data
17 40 IBN IN-Bulk-NAK (any IN endpoint)
18 44 reserved
19 48 EP0PING EP0 OUT was Pinged and it NAK’d
20 4C EP1PING EP1 OUT was Pinged and it NAK’d
21 50 EP2PING EP2 OUT was Pinged and it NAK’d
22 54 EP4PING EP4 OUT was Pinged and it NAK’d
23 58 EP6PING EP6 OUT was Pinged and it NAK’d
24 5C EP8PING EP8 OUT was Pinged and it NAK’d
25 60 ERRLIMIT Bus errors exceeded the programmed limit
26 64 reserved
27 68 reserved
28 6C reserved
29 70 EP2ISOERR ISO EP2 OUT PID sequence error
30 74 EP4ISOERR ISO EP4 OUT PID sequence error
31 78 EP6ISOERR ISO EP6 OUT PID sequence error
32 7C EP8ISOERR ISO EP8 OUT PID sequence error

Cypress CY7C68013 Specifications

General

Brand	Cypress
Model	CY7C68013
Category	Controller
Language	English