MITSUBISHI MICROCOMPUTERS
7470/7471 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
b7
b0
Edge polarity selection register (EG)
(Address 00D416
)
INT
INT
0
1
edge selection bit
edge selection bit
CNTR
CNTR
0
edge selection bit
edge selection bit
1
0 : Falling edge
1 : Rising edge
CNTR0/CNTR1 interrupt selection bit
0 : CNTR
1 : CNTR
0
1
INT1 source selection bit (at power-down state)
0 : P3
1 : P0
1
0
/INT
–P0
1
7
“L” level (for key-on wake-up)
Nothing is allocated (The value is undefined at reading)
b7
b0
b7
b0
Interrupt request register 1
Interrupt request register 2
(Address 00FD16)
(Address 00FC16
)
Timer 1 interrupt request bit
Timer 2 interrupt request bit
Timer 3 interrupt request bit
Timer 4 interrupt request bit
INT
INT
0
1
interrupt request bit
interrupt request bit
CNTR0 or CNTR1 interrupt request bit
0 : No interrupt request
1 : Interrupt requested
Nothing is allocated
(The value is undefined at reading)
Nothing is allocated
(The value is undefined at reading)
Serial I/O transmit interrupt request bit
A-D conversion completion interrupt request bit
b7
b0
b7
b0
Interrupt control register 1
Interrupt control register 2
(Address 00FF16)
(Address 00FE16
)
Timer 1 interrupt enable bit
Timer 2 interrupt enable bit
Timer 3 interrupt enable bit
Timer 4 interrupt enable bit
INT
INT
0
1
interrupt enable bit
interrupt enable bit
CNTR0 or CNTR1 interrupt enable bit
0 : Interrupt disable
1 : Interrupt enabled
Nothing is allocated
(The value is undefined at reading)
Nothing is allocated
(The value is undefined at reading)
Serial I/O receive interrupt enable bit
A-D conversion completion interrupt enable bit
Fig. 4 Structure of registers related to interrupt
Interrupt request bit
Interrupt enable bit
Interrupt disable flag I
BRK instruction
Reset
Interrupt request
Fig. 5 Interrupt control
12
ETC [ ETC ]
