Cypress CY7C68015A INT2 USB Interrupts, Priority INT2VEC Value Source, FIFO/GPIF Interrupt INT4

CY7C68013A, CY7C68014A

CY7C68015A, CY7C68016A

The FX2LP jump instruction is encoded as follows:

Table 3. 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	FX2LP 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
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

If Autovectoring is enabled (AV2EN = 1 in the INTSET-UP register), the FX2LP substitutes its INT2VEC byte. Therefore, if the high byte (“page”) of a jump-table address is preloaded at the location 0x0044, the automatically inserted INT2VEC byte at 0x0045 directs the jump to the correct address out of the 27 addresses within the page.

3.8.3 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 #: 38-08032 Rev. *L Page 5 of 62

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