Rev.4.01
Nov 14, 2003
page 35 of 136
3803/3804 Group
Fig. 27 Structure of interrupt-related registers of 3803 group
Interrupt edge selection register
INT0 active edge selection bit
INT1 active edge selection bit
Not used (returns “0” when read)
INT2 active edge selection bit
INT3 active edge selection bit
INT4 active edge selection bit
INT0, INT4 interrupt switch bit
0 : INT00, INT40 interrupt
1 : INT01, INT41 interrupt
Not used (returns “0” when read)
(INTEDGE : address 003A16)
Interrupt request register 1
INT0/Timer Z interrupt request bit
INT1 interrupt request bit
Serial I/O1 receive interrupt request bit
Serial I/O1 transmit interrupt request bit
Timer X interrupt request bit
Timer Y interrupt request bit
Timer 1 interrupt request bit
Timer 2 interrupt request bit
Interrupt control register 1
0 : No interrupt request issued
1 : Interrupt request issued
(IREQ1 : address 003C16)
(ICON1 : address 003E16)
Interrupt request register 2
CNTR0 interrupt request bit
CNTR1/Serial I/O3 receive interrupt
request bit
Serial I/O2/Timer Z interrupt request bit
INT2 interrupt request bit
INT3 interrupt request bit
INT4/CNTR2 interrupt request bit
AD converter/Serial I/O3 transmit
interrupt request bit
Not used (returns “0” when read)
(IREQ2 : address 003D16)
Interrupt control register 2
0 : Interrupts disabled
1 : Interrupts enabled
(ICON2 : address 003F16)
0 : Falling edge active
1 : Rising edge active
0 : Falling edge active
1 : Rising edge active
CNTR0 interrupt enable bit
CNTR1/Serial I/O3 receive interrupt
enable bit
Serial I/O2/Timer Z interrupt enable bit
INT2 interrupt enable bit
INT3 interrupt enable bit
INT4/CNTR2 interrupt enable bit
AD converter/Serial I/O3 transmit
interrupt enable bit
Not used (returns “0” when read)
INT0/Timer Z interrupt enable bit
INT1 interrupt enable bit
Serial I/O1 receive interrupt enable bit
Serial I/O1 transmit interrupt enable bit
Timer X interrupt enable bit
Timer Y interrupt enable bit
Timer 1 interrupt enable bit
Timer 2 interrupt enable bit
b7
INT0/Timer Z interrupt source selection bit
0 : INT0 interrupt
1 : Timer Z interrupt
Serial I/O2/Timer Z interrupt source selection bit
0 : Serial I/O2 interrupt
1 : Timer Z interrupt
Not used
(Do not write “1” to these bits.)
INT4/CNTR2 interrupt source selection bit
0 : INT4 interrupt
1 : CNTR2 interrupt
Not used
(Do not write “1” to this bit.)
CNTR1/Serial I/O3 receive interrupt source selection bit
0 : CNTR1 interrupt
1 : Serial I/O3 receive interrupt
AD converter/Serial I/O3 transmit interrupt source selection bit
0 : A-D converter interrupt
1 : Serial I/O3 transmit interrupt
Interrupt source selection register
(Do not write “1” to these bits simultaneously.)
(INTSEL: address 003916)
b0
b7
b0
b7
b0
b7
b0
b7
b0
b7
b0