HD6432621 Hitachi, HD6432621 Datasheet - Page 134

• Manufacturer Part Number: HD6432621
• Description: (HD64F262x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

4.4
Interrupt exception handling can be requested by seven external sources (NMI, IRQ5 to IRQ0) and
internal sources (H8S/2626 Series: 48, H8S/2623 Series: 47) 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), Hitachi controller area network (HCAN), and A/D converter.
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.
90
Notes:
Interrupts
Numbers in parentheses are the numbers of interrupt sources.
* When the watchdog timer is used as an interval timer, it generates an interrupt
Interrupts
request at each counter overflow.
Figure 4-4 Interrupt Sources and Number of Interrupts
External
interrupts
Internal
interrupts
WDT * H8S/2626 Series (2), H8S/2623 Series (1)
TPU (26)
SCI (12)
DTC (1)
PBC (1)
HCAN (5)
A/D converter (1)
NMI (1)
IRQ5 to IRQ0 (6)