NEC PD754244 Manuel D’Utilisation

User’s Manual  U10676EJ3V0UM

Function:  A 

←

 PORTn  n = N

3-0

: 3, 6, 7, 8

Transfers the contents of a port specified by PORTn (n = 3, 6, 7, 8) to the A register.

When this instruction is executed, it is necessary that MBE = 0 or (MBE = 1, MBS = 15). n can be 3, 6, 7, 8.

The data of the output latch is loaded to the A register in the output mode, and the data of the port pins are loaded

to the register in the input mode.

Function:  PORTn 

←

 A  n = N

3-0

: 3, 6, 8

Transfers the contents of the A register to the output latch of a port specified by PORTn (n = 3, 6, 8).

When this instruction is executed, it is necessary that MBE = 0 or (MBE = 1, MBS = 15).

Only 3, 6, and 8 can be specified as n.