p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 113

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

5.1
• Two interrupt control modes
• Priorities settable with ICR
• Three-level interrupt mask control
• Independent vector addresses
• Nine external interrupt pins
• DTC control
• General ports for IRQ7 to IRQ0 input are selectable
Two interrupt control modes can be set by means of the INTM1 and INTM0 bits in the system
control register (SYSCR).
An interrupt control register (ICR) is provided for setting in each module interrupt priority
levels for all interrupt requests excluding NMI and address breaks.
By means of the interrupt control mode, I and UI bits in CCR and ICR, 3-level interrupt mask
control is performed.
All interrupt sources are assigned independent vector addresses, making it unnecessary for the
source to be identified in the interrupt handling routine.
NMI is the highest-priority interrupt, and is accepted at all times. Rising edge or falling edge
detection can be selected for NMI. Falling-edge, rising-edge, or both-edge detection, or level
sensing, can be independently selected for IRQ7 to IRQ0.
The DTC can be activated by an interrupt request.
Features
Section 5 Interrupt Controller
Rev. 1.00 Sep. 21, 2006 Page 75 of 658
Section 5 Interrupt Controller
REJ09B0310-0100