HD6412350 Hitachi, HD6412350 Datasheet - Page 106

• Manufacturer Part Number: HD6412350
• Description: (HD6412350 / HD6432351) 16-BIT MICROCONTROLLER
• Manufacturer: Hitachi

4.4
Interrupt exception handling can be requested by nine external sources (NMI, IRQ7 to IRQ0) and
42 internal sources 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),
refresh timer, 16-bit timer-pulse unit (TPU), serial communication interface (SCI), data transfer
controller (DTC), DMA controller (DMAC), 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.
86
Notes:
Interrupts
Numbers in parentheses are the numbers of interrupt sources.
1. When the watchdog timer is used as an interval timer, it generates
2. When the refresh timer is used as an interval timer, it generates an
Figure 4-4 Interrupt Sources and Number of Interrupts
Interrupts
an interrupt request at each counter overflow.
interrupt request at each compare match.
External
interrupts
Internal
interrupts
NMI (1)
IRQ7 to IRQ0 (8)
WDT
Refresh timer
TPU (26)
SCI (8)
DTC (1)
DMAC (4)
A/D converter (1)
*1
(1)
*2
(1)