D12320VF25IV Datasheet, PDF (160/1304 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 5 Interrupt Controller
Figure 5.4 shows a block diagram of the priority decision circuit.
Interrupt
control
mode 0 I
Interrupt source
Interrupt
acceptance
control
8-level
mask control
Default priority
determination
Vector number
I2 to I0
IPR
Interrupt control mode 2
Figure 5.4 Block Diagram of Interrupt Control Operation
Interrupt Acceptance Control: In interrupt control mode 0, interrupt acceptance is controlled by
the I bit in CCR.
Table 5.6 shows the interrupts selected in each interrupt control mode.
Table 5.6 Interrupts Selected in Each Interrupt Control Mode (1)
Interrupt Control Mode
0
2
Interrupt Mask Bits
I
0
1
*
Selected Interrupts
All interrupts
NMI interrupts
All interrupts
*: Don't care
Rev.6.00 Sep. 27, 2007 Page 128 of 1268
REJ09B0220-0600