CY7C68053
Document # 001-06120 Rev *I
Page 4 of 40
If Autovectoring is enabled (AV2EN = 1 in the INTSET-UP
register), the FX2LP18 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 directs the jump to the correct address out of the 27
addresses within the page.
Table 2. INT2 USB Interrupts
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
FX2LP18 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
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