RX610 Group
10. ICU
R01UH0032EJ0120 Rev.1.20
Page 225 of 1006
Feb 20, 2013
10.2.2
Interrupt Request Destination Setting Register i (ISELRi) (i = interrupt vector
number)
Addresses:
0008 711Ch to 0008 71FDh
b7
b6
b5
b4
b3
b2
b1
b0
Value after reset:
0
0
0
0
0
0
0
0
—
—
—
—
—
—
ISEL[1:0]
Bit
Symbol
Bit Name
Description
R/W
b1, b0
ISEL[1:0] Interrupt
Destination
b1 b0
0 0: The request is sent to the CPU.
0 1: The request activates the DTC and is passed to the CPU
on completion of data transfer.
*
1
1 0: The request activates the DMAC.
1 1: The request activates the DMAC and is then passed to
the CPU.
*
1
R/W
*
2
b7 to b2
Reserved
These bits are read as 0. The write value should always be 0.
R/W
Notes: 1. The ISEL[1:0] bits are automatically cleared to 00b on completion of DTC data transfer or DMAC activation. For
details, refer to section 10.4.3, Selecting Interrupt Request Destinations.
2. The DMAC cannot be selected as an interrupt request destination for some interrupt sources. In such cases,
the lowest 1 bit is valid and the upper 7 bits are reserved. The reserved bits are read as 0. The write value to
the reserved bits should always be 0.
The ISELRi register is used to set the destination of an interrupt request.
ISEL[1:0] Bits (Interrupt Destination)
These bits specify the destination of an interrupt request.
The ISEL[1:0] bits should be modified after the interrupt request is disabled by the setting of the IENj bit in IERi.
The interrupt request destinations available for specification by the ISEL[1:0] bits depend on the interrupt source. For the
correspondence between specifiable interrupt request destinations and interrupt sources, see table 10.4, Interrupt Vector
Table.
If the setting of the IENj bit in IERi enables the interrupt request and the IR flag in the corresponding IRi is set to 1, the
interrupt request is output to the destination that has been specified by the ISEL[1:0] bits. For details, see section 10.4.3,
Selecting Interrupt Request Destinations.
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