MITSUBISHI MICROCOMPUTERS
7477/7478 GROUP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
b7
b0
Edge polarity selection register (EG)
(Address 00D416)
INT0 edge selection bit
INT1 edge selection bit
CNTR0 edge selection bit
CNTR1 edge selection bit
0 : Falling edge
1 : Rising edge
CNTR0/CNTR1 interrupt selection bit
0 : CNTR0
1 : CNTR1
INT1 source selection bit (at power-down state)
0 : P31/INT1
1 : P00 – P07 “L” level (for key-on wake-up)
Nothing is allocated (The value is undefined at reading)
b7
b0
b7
Interrupt request register 1
b0
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
INT0 interrupt request bit
INT1 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 receive interrupt request bit
Serial I/O transmit interrupt request bit
A-D conversion completion interrupt request bit
b7
b0
b7
Interrupt control register 1
b0
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
INT0 interrupt enable bit
INT1 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
Serial I/O transmit 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 request
Interrupt disable flag I
BRK instruction
Reset
Fig. 5 Interrupt control
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MITSUBISHI [ Mitsubishi Group ]
