M306V2ME-XXXFP Datasheet, PDF (63/271 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

M306V2ME-XXXFP, M306V2EEFP
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2.7.17 INT Interrupt
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INT0 and INT1 are triggered by the edges of external inputs. The edge polarity is selected using the
polarity select bit.
As for external interrupt input, an interrupt can be generated both at the rising edge and at the falling edge
by setting “1” in the INTi interrupt polarity switching bit of the interrupt request cause select register
(035F16). To select both edges, set the polarity switching bit of the corresponding interrupt control regis-
ter to ‘falling edge’ (“0”).
Figure 2.7.10 shows the Interrupt control reserved register, Figure 2.7.11 shows the Interrupt request
cause select register.
Interrupt control reserved register i
b7 b6 b5 b4 b3 b2 b1 b0
0000 0000
Symbol
REiIC (i = 0 to 3)
Address
When reset
004516, 004616, 004716, 005F16 Indeterminate
Bit symbol
Reserved bits
Bit name
Function
Must always be set to “0”
RW
Figure 2.7.10 Interrupt control reserved register i (i = 0 to 3)
Interrupt request cause select register
b7 b6 b5 b4 b3 b2 b1 b0
0000 00
Symbol
IFSR
Address
035F16
Bit symbol
IFSR0
IFSR1
Bit name
INT0 interrupt polarity
switching bit
INT1 interrupt polarity
switching bit
Reserved bits
When reset
0016
Function
0 : One edge
1 : Two edges
0 : One edge
1 : Two edges
Must always be set to “0”
RW
Figure 2.7.11 Interrupt request cause select register
Rev.1.40 Oct 06, 2004 page 63 of 269