h8s-2169 Renesas Electronics Corporation., h8s-2169 Datasheet - Page 120

• Manufacturer Part Number: h8s-2169
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 4 Exception Handling
4.1.2
Exceptions originate from various sources. Trap instructions and interrupts are handled as follows:
1. The program counter (PC) and condition-code register (CCR) are pushed onto the stack.
2. The interrupt mask bits are updated. The T bit is cleared to 0.
3. A vector address corresponding to the exception source is generated, and program execution
For a reset exception, steps 2 and 3 above are carried out.
4.1.3
The exception sources are classified as shown in figure 4.1. Different vector addresses are
assigned to different exception sources.
Table 4.2 lists the exception sources and their vector addresses.
Rev. 3.00 Jan 18, 2006 page 92 of 1044
REJ09B0280-0300
starts from that address.
Exception Handling Operation
Exception Sources and Vector Table
Exception
sources
Reset
Trace
Interrupts
Direct transition
Trap instruction
Figure 4.1 Exception Sources
(Cannot be used in the H8S/2169 or H8S/2149)
External interrupts: NMI, IRQ7 to IRQ0
Internal interrupts: interrupt sources in
on-chip supporting modules