User guide

CY7C68013A, CY7C68014A
CY7C68015A, CY7C68016A
Document Number: 38-08032 Rev. *X Page 8 of 71
If Autovectoring is enabled (AV4EN = 1 in the INTSET-UP
register), the FX 2LP substitutes its INT4VEC byte. Therefore, if
the high byte (“page”) of a jump-table address is preloaded at
location 0x0054, the automatically inserted INT4VEC byte at
0x0055 directs the jump to the correct address out of the 14
addresses within the page. When the ISR occurs, the FX2LP
pushes the program counter to its stack then jumps to address
0x0053, where it expects to find a “jump” instruction to the ISR
Interrupt service routine.
Table 4. Individual FIFO/GPIF Interrupt Sources
Priority INT4VEC Value Source Notes
1 80 EP2PF Endpoint 2 programmable flag
2 84 EP4PF Endpoint 4 programmable flag
3 88 EP6PF Endpoint 6 programmable flag
4 8C EP8PF Endpoint 8 programmable flag
5 90 EP2EF Endpoint 2 empty flag
[3]
6 94 EP4EF Endpoint 4 empty flag
7 98 EP6EF Endpoint 6 empty flag
8 9C EP8EF Endpoint 8 empty flag
9 A0 EP2FF Endpoint 2 full flag
10 A4 EP4FF Endpoint 4 full flag
11 A8 EP6FF Endpoint 6 full flag
12 AC EP8FF Endpoint 8 full flag
13 B0 GPIFDONE GPIF operation complete
14 B4 GPIFWF GPIF waveform
Note
3. Errata: In Slave FIFO Asynchronous Word Wide mode, if a single word data is transferred from the USB host to EP2, configured as OUT Endpoint (EP) in the first
transaction, then the Empty flag behaves incorrectly. This does not happen if the data size is more than one word in the first transaction. For more information, see
the “Errata” on page 67.