EM78M612
Universal Serial Bus Microcontroller Series
CONT [6] Interrupt enable control bit. This bit toggles Interrupt function between enable
and disable. It is set to 1 by the interrupt disable instruction "DISI" and reset by
the interrupt enable instructions "ENI" or "RETI."
0: Enable the Interrupt function.
1: Disable the Interrupt function.
CONT [7] Undefined register. The default value is one.
IOC5 ~IOC7 (I/O Port [Port 5 ~ Port 7] Direction Control Registers
Each bit controls the I/O direction of three I/O ports respectively. When these bits are set to
1, the relative I/O pins become input pins. Similarly, the I/O pins becomes outputs when the
relative control bits are cleared.
1: Input direction.
0: Output direction.
IOC5 (Data Line I/O Control Register) Default Value: (0B_0000_0011)
7
0
6
0
5
0
4
0
3
0
2
0
1
I/O
0
I/O
IOC5 [2~7] Undefined registers. The default value is 0.
IOC6 (Port 6 I/O Control Register) Default Value: (0B_1111_1111)
7
P67
6
P66
5
P65
4
P64
3
P63
2
P62
1
P61
0
1
IOC6 [0]
This bit is always 1. This is because P60 can only be used as an input pin.
IOC7 (Port 7 I/O Control Register) Default Value: (0B_1111_1111)
7
6
5
4
3
2
1
0
P77
P76
P75
P74
P73
P72
P71
P70
This specification may change without further notice.
2004/4/28 V1.1
19
ELAN [ ELAN MICROELECTRONICS CORP ]
