SH7619_09 Datasheet, PDF (109/860 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7619 Series

Section 5 Exception Handling
Exception Handling Triggered by Address Error, Interrupt, and Instruction: SR and PC are
saved to the stack indicated by R15. For interrupt exception handling, the interrupt priority level is
written to the interrupt mask bits (I3 to I0) in SR. For address error and instruction exception
handling, bits I3 to I0 are not affected. The start address is then fetched from the exception
handling vector table and the program starts from that address.
5.1.3 Exception Handling Vector Table
Before exception handling starts, the exception handling vector table must be set in memory. The
exception handling vector table stores the start addresses of exception handling routines. (The
reset exception handling table holds the initial values of PC and SP.)
All exception sources are given different vector numbers and vector table address offsets. The
vector table addresses are calculated from these vector numbers and vector table address offsets.
During exception handling, the start addresses of the exception handling routines are fetched from
the exception handling vector table that is indicated by this vector table address.
Table 5.3 shows the vector numbers and vector table address offsets. Table 5.4 shows how vector
table addresses are calculated.
Table 5.3 Vector Numbers and Vector Table Address Offsets
Exception Handling Source
Power-on reset
PC
H-UDI reset
SP
(Reserved by system)
General illegal instruction
(Reserved by system)
Illegal slot instruction
(Reserved by system)
CPU address error
(Reserved by system)
Interrupt
NMI
User break
H-UDI
Vector Number
0
1
2
3
4
5
6
7
8
9
10
11
12
13
Vector Table Address Offset
H'00000000 to H'00000003
H'00000004 to H'00000007
H'00000008 to H'0000000B
H'0000000C to H'0000000F
H'00000010 to H'00000013
H'00000014 to H'00000017
H'00000018 to H'0000001B
H'0000001C to H'0000001F
H'00000020 to H'00000023
H'00000024 to H'00000027
H'00000028 to H'0000002B
H'0000002C to H'0000002F
H'00000030 to H'00000033
H'00000034 to H'00000037
Rev. 6.00 Jul. 15, 2009 Page 69 of 816
REJ09B0237-0600