h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 114
h8s-2646
Manufacturer Part Number
h8s-2646
Description
Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.H8S-2646.pdf
(1165 pages)
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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), condition code register (CCR), and extended register (EXR) are
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. 5.00 Sep 22, 2005 page 88 of 1136
REJ09B0257-0500
pushed onto the stack.
starts from that address.
Exception
sources
Exception Handling Operation
Exception Vector Table
Reset
Trace
Interrupts
Trap instruction
External interrupts: NMI, IRQ5 to IRQ0
Internal interrupts: Interrupts from on-chip supporting modules
Figure 4.1 Exception Sources
43 sources in the H8S/2646, H8S/2646R,
and H8S/2645
47 sources in the H8S/2648, H8S/2648R,
and H8S/2647
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