HD6432646 Hitachi, HD6432646 Datasheet - Page 130
HD6432646
Manufacturer Part Number
HD6432646
Description
(HD64F264x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432646.pdf
(1155 pages)
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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, Hitachi 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.
Notes: Numbers in parentheses are the numbers of interrupt sources.
96
* When the watchdog timer is used as an interval timer, it generates an interrupt request
Interrupts
at each counter overflow.
Interrupts
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)
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