CY7C68033/CY7C68034
Document #: 001-04247 Rev. *D
Page 6 of 33
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.
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
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