Cypress CY7C68033 INT2 USB Interrupts, USB Interrupt Table for INT2, FIFO/GPIF Interrupt INT4

CY7C68033/CY7C68034

Table 3. INT2 USB Interrupts

USB INTERRUPT TABLE FOR INT2

Priority	INT2VEC Value	Source	Notes
1	0x500	SUDAV	Setup Data Available
2	0x504	SOF	Start of Frame (or microframe)
3	0x508	SUTOK	Setup Token Received
4	0x50C	SUSPEND	USB Suspend request
5	0x510	USB RESET	Bus reset
6	0x514	HISPEED	Entered high speed operation
7	0x518	EP0ACK	NX2LP ACK’d the CONTROL Handshake
8	0x51C		Reserved
9	0x520	EP0-IN	EP0-IN ready to be loaded with data
10	0x524	EP0-OUT	EP0-OUT has USB data
11	0x528	EP1-IN	EP1-IN ready to be loaded with data
12	0x52C	EP1-OUT	EP1-OUT has USB data
13	0x530	EP2	IN: buffer available. OUT: buffer has data
14	0x534	EP4	IN: buffer available. OUT: buffer has data
15	0x538	EP6	IN: buffer available. OUT: buffer has data
16	0x53C	EP8	IN: buffer available. OUT: buffer has data
17	0x540	IBN	IN-Bulk-NAK (any IN endpoint)
18	0x544		Reserved
19	0x548	EP0PING	EP0 OUT was Pinged and it NAK’d
20	0x54C	EP1PING	EP1 OUT was Pinged and it NAK’d
21	0x550	EP2PING	EP2 OUT was Pinged and it NAK’d
22	0x554	EP4PING	EP4 OUT was Pinged and it NAK’d
23	0x558	EP6PING	EP6 OUT was Pinged and it NAK’d
24	0x55C	EP8PING	EP8 OUT was Pinged and it NAK’d
25	0x560	ERRLIMIT	Bus errors exceeded the programmed limit
26	0x564		Reserved
27	0x568		Reserved
28	0x56C		Reserved
29	0x570	EP2ISOERR	ISO EP2 OUT PID sequence error
30	0x574	EP4ISOERR	ISO EP4 OUT PID sequence error
31	0x578	EP6ISOERR	ISO EP6 OUT PID sequence error
32	0x57C	EP8ISOERR	ISO EP8 OUT PID sequence error

If Autovectoring is enabled (AV2EN = 1 in the INTSET-UP register), the NX2LP-Flex substitutes its INT2VEC byte. Therefore, if the high byte (‘page’) of a jump-table address is preloaded at location 0x544, the automatically-inserted INT2VEC byte at 0x545 will direct the jump to the correct address out of the 27 addresses within the page.

FIFO/GPIF Interrupt (INT4)

Just as the USB Interrupt is shared among 27 individual USB-interrupt sources, the FIFO/GPIF interrupt is shared among 14 individual FIFO/GPIF sources. The FIFO/GPIF Interrupt, like the USB Interrupt, can employ autovectoring. Table 4 shows the priority and INT4VEC values for the 14 FIFO/GPIF interrupt sources.

Document #: 001-04247 Rev. *D Page 6 of 33

[+] Feedback