3800 Datasheet, PDF (76/174 Pages) Renesas Technology Corp – 8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES

APPLICATION
2.3 Serial I/O
Interrupt request register 1
b7 b6 b5 b4 b3 b2 b1 b0
Interrupt request reigster 1 (IREQ1) [Address : 3C16]
B
Name
0 INT0 interrupt request bit
1 INT1 interrupt request bit
2 Serial I/O receive interrupt
request bit
3 ^{Serial I/O transmit interrupt}
request bit
4 Timer X interrupt request bit
bit
5 Timer Y interrupt request bit
6 Timer 1 interrupt request bit
7 ^{Timer 2 interrupt request bit}
Function
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
T “0” is set by software, but not “1.”
Fig. 2.3.8 Structure of Interrupt request register 1
At reset _{R W}
0
T
0
T
0
T
0
T
0
T
0
T
0
T
0
T
Interrupt control register 1
b7 b6 b5 b4 b3 b2 b1 b0
Interrupt control register 1 (ICON1) [Address : 3E16]
B
Name
0 ^{INT0 interrupt enable bit}
1 ^{INT1 interrupt enable bit}
Function
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
2 ^{Serial I/O receive interrupt}
enable bit
3 ^{Serial I/O transmit interrupt}
enable bit
4 ^{Timer X interrupt enable bit}
5 ^{Timer Y interrupt enable bit}
6 ^{Timer 1 interrupt enable bit}
7 Timer 2 interrupt enable bit
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
Fig. 2.3.9 Structure of Interrupt control register 1
At reset _{R W}
0
0
0
0
0
0
0
0
3800 GROUP USER’S MANUAL
2-27