Section 5 Interrupt Controller
Rev. 3.00 Mar. 14, 2006 Page 89 of 804
REJ09B0104-0300
5.3 Register
Descriptions
The interrupt controller has the following registers.
•
Interrupt control register (INTCR)
•
CPU priority control register (CPUPCR)
•
Interrupt priority registers A to G, I, K to O, Q, and R (IPRA to IPRG, IPRI, IPRK to IPRO,
IPRQ, and IPRR)
•
IRQ enable register (IER)
•
IRQ sense control registers H and L (ISCRH, ISCRL)
•
IRQ status register (ISR)
•
Software standby release IRQ enable register (SSIER)
5.3.1 Interrupt
Control Register (INTCR)
INTCR selects the interrupt control mode, and the detected edge for NMI.
Bit
Bit Name
Initial Value
R/W
7
—
0
R
6
—
0
R
5
INTM1
0
R/W
4
INTM0
0
R/W
3
NMIEG
0
R/W
2
—
0
R
1
—
0
R
0
—
0
R
Bit Bit
Name
Initial
Value R/W Description
7, 6
All
0
R
Reserved
These are read-only bits and cannot be modified.
5
4
INTM1
INTM0
0
0
R/W
R/W
Interrupt Control Select Mode 1 and 0
These bits select either of two interrupt control modes
for the interrupt controller.
00: Interrupt control mode 0
Interrupts are controlled by I bit in CCR.
01: Setting prohibited.
10: Interrupt control mode 2
Interrupts are controlled by bits I2 to I0 in EXR, and
IPR.
11: Setting prohibited.
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