M32C8A Datasheet, PDF (222/372 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M32C/80 Series

M32C/8A Group
17. Serial Interfaces
External Interrupt Source Select Register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
IFSR
Address
031Fh
After Reset
00h
Bit Symbol
Bit Name
Function
RW
IFSR0
IFSR1
IFSR2
IFSR3
IFSR4
IFSR5
INT0 interrupt polarity
select bit⁽¹⁾
INT1 interrupt polarity
select bit⁽¹⁾
INT2 interrupt polarity
select bit⁽¹⁾
INT3 interrupt polarity
select bit⁽¹⁾
INT4 interrupt polarity
select bit⁽¹⁾
INT5 interrupt polarity
select bit⁽¹⁾
IFSR6
UART0, UART3
interrupt source select bit
IFSR7
UART1, UART4
interrupt source select bit
0: One edge
1: Both edges
RW
0: One edge
1: Both edges
RW
0: One edge
1: Both edges
RW
0: One edge
1: Both edges
RW
0: One edge
1: Both edges
RW
0: One edge
1: Both edges
RW
0: UART3 bus conflict, start condition detection,
stop condition detection
1: UART0 bus conflict, start condition detection,
RW
stop condition detection
0: UART4 bus conflict, start condition detection,
stop condition detection
1: UART1 bus conflict, start condition detection,
RW
stop condition detection
NOTE:
1. Set the IFSRi bit (i = 0 to 5) to 0 to select a level-sensitive triggering. When selecting both edges, set the POL bit in the
corresponding INTilC register to 0 (falling edge).
Figure 17.9 IFSR Register
Rev.1.00 Jul 15, 2007 Page 205 of 352
REJ09B0385-0100