h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 120

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 4 Exception Handling
4.4
Interrupt exception handling can be requested by seven external sources (NMI, IRQ5 to IRQ0) and
internal sources (43 sources in the H8S/2646, H8S/2646R, and H8S/2645, and 47 sources in the
H8S/2648, H8S/2648R, and H8S/2647) in the on-chip supporting modules. Figure 4.4 classifies
the interrupt sources and the number of interrupts of each type.
The on-chip supporting modules that can request interrupts include the watchdog timer (WDT),
16-bit timer pulse unit (TPU), serial communication interface (SCI), data transfer controller
(DTC), PC break controller (PBC), A/D converter, controller area network (HCAN), and motor
control PWM timer. Each interrupt source has a separate vector address.
NMI is the highest-priority interrupt. Interrupts are controlled by the interrupt controller. The
interrupt controller has two interrupt control modes and can assign interrupts other than NMI to
eight priority/mask levels to enable multiplexed interrupt control.
For details of interrupts, see section 5, Interrupt Controller.
Rev. 5.00 Sep 22, 2005 page 94 of 1136
REJ09B0257-0500
Notes: Numbers in parentheses are the numbers of interrupt sources.
Interrupts
Interrupts
* When the watchdog timer is used as an interval timer, it generates an interrupt
request at each counter overflow.
Figure 4.4 Interrupt Sources and Number of Interrupts
External
interrupts
Internal
interrupts
WDT * (2)
TPU (26)
SCI (8): H8S/2646, H8S/2646R, H8S/2645
SCI (12): H8S/2648, H8S/2648R, H8S/2647
DTC (1)
PBC (1)
A/D converter (1)
PWM (2)
HCAN (2)
NMI (1)
IRQ5 to IRQ0 (6)