Table 9-3. A Typical USB Jump Table
Table
Instruction
Offset
00
04
08
0C
10
14
JMP SUDAV_ISR
JMP SOF_ISR
JMP SUTOK_ISR
JMP SUSPEND_ISR
JMP USBRESET_ISR
JMP IBN_ISR (2122/2126
only, otherwise NOP)
18
1C
20
24
28
2C
30
34
38
3C
40
44
48
4C
50
54
JMP EP0IN _ISR
JMP EP0OUT_ISR
JMP IN1BUF_ISR
JMP EP1OUT_ISR
JMP EP2IN_ISR
JMP EP2OUT_ISR
JMP EP3IN_ISR
JMP EP3OUT_ISR
JMP EP4IN_ISR
JMP EP4OUT_ISR
JMP EP5IN_ISR
JMP EP5OUT_ISR
JMP EP6IN_ISR
JMP EP6OUT_ISR
JMP EP7IN_ISR
JMP EP7OUT_ISR
9.11 Autovector Coding
A detailed example of a program that uses Autovectoring is presented in Section 6.14,
"Interrupt Bulk Transfer Example." The coding steps are summarized here. To employ
EZ-USB Autovectoring:
1. Insert a jump instruction at 0x43 to a table of jump instructions to the various USB
interrupt service routines.
EZ-USB TRM v1.9
Chapter 9. EZ-USB Interrupts
Page 9-11
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