Interrupt Source Select Register (Ifsr) - Renesas M16C/64A Series User Manual

M16C/64A Group
14.2.6

Interrupt Source Select Register (IFSR)

Interrupt Source Select Register
b7 b6 b5 b4 b3 b2 b1
IFSR5-IFSR0 (INT5-INT0 interrupt polarity select bit) (b5-b0)
When setting these bits to 1 (both edges), make sure the corresponding POL bit in registers INT0IC to
INT5IC is set to 0 (falling edge).
IFSR7, IFSR6 (Interrupt request source select bit) (b7, b6)
In memory expansion or microprocessor mode, when the data bus is 16 bits wide (BYTE pin is low), set
these bits to 0 (SI/O3, SI/O4).
When setting these bits to 0 (SI/O3, SI/O4), make sure the corresponding POL bit in registers S3IC and
S4IC is set to 0 (falling edge).
R01UH0136EJ0210 Rev.2.10
Jul 31, 2012
b0 Symbol
IFSR
Bit Symbol Bit Name
INT0 interrupt polarity select
IFSR0
bit
INT1 interrupt polarity select
IFSR1
bit
INT2 interrupt polarity select
IFSR2
bit
INT3 interrupt polarity select
IFSR3
bit
INT4 interrupt polarity select
IFSR4
bit
INT5 interrupt polarity select
IFSR5
bit
Interrupt request source
IFSR6
select bit
Interrupt request source
IFSR7
select bit
Address
0207h
Function
0 : One edge
1 : Both edges
0 : One edge
1 : Both edges
0 : One edge
1 : Both edges
0 : One edge
1 : Both edges
0 : One edge
1 : Both edges
0 : One edge
1 : Both edges
0 : SI/O3
1 : INT4
0 : SI/O3
1 : INT5
14. Interrupts
Reset Value
00h
RW
RW
RW
RW
RW
RW
RW
RW
RW
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