SH7785 datasheet(119/1692 Pages) RENESAS

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5. Exception Handling

Rev.1.00 Jan. 10, 2008 Page 89 of 1658

REJ09B0261-0100

Section 5 Exception Handling

5.1

Summary of Exception Handling

Exception handling processing is handled by a special routine which is executed by a reset,

general exception handling, or interrupt. For example, if the executing instruction ends

abnormally, appropriate action must be taken in order to return to the original program sequence,

or report the abnormality before terminating the processing. The process of generating an

exception handling request in response to abnormal termination, and passing control to a user-

written exception handling routine, in order to support such functions, is given the generic name of

exception handling.

The exception handling in this LSI is of three kinds: resets, general exceptions, and interrupts.

5.2

Table 5.1 lists the configuration of registers related exception handling.

Table 5.1

Abbr.

R/W

P4 Address*

Area 7

Address*

Access Size

TRAPA exception register

TRA

R/W

H'FF00 0020

H'1F00 0020

Exception event register

EXPEVT

R/W

H'FF00 0024

H'1F00 0024

Interrupt event register

INTEVT

R/W

H'FF00 0028

H'1F00 0028

Non-support detection exception

EXPMASK R/W

H'FF2F 0004

H'1F2F 0004

Note:

P4 is the address when virtual address space P4 area is used. Area 7 is the address

when physical address space area 7 is accessed by using the TLB.

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