NEC PD75402A - Manual (Page 52)

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CHAPTER 5. PERIPHERAL HARDWARE FUNCTIONS
CHAPTER 5. PERIPHERAL HARDWARE FUNCTIONS
5.1 DIGITAL INPUT/OUTPUT PORTS
The
µ
PD75402A has the following digital input/output ports on chip: Ports 0 through 3, 5 and 6.
The
µ
PD75402A uses memory mapped I/O, and all input/output ports are mapped onto data memory space.
All data memory handling instructions can be used on all of the ports, and a wide variety of bit operations can
be performed in addition to 4-bit input/output.
Note On the
µ
PD75402A it is not possible to perform 8-bit input/output by pairing two ports.
Fig. 5-1 Digital Input/Output Port Data Memory Addresses
Address 3 2 1 0 Symbol
FF0H P03 P02 P01 P00 PORT0
FF1H 0 P12 0 P10 PORT1
FF2H P23 P22 P21 P20 PORT2
FF3H P33 P32 P31 P30 PORT3
FF5H P53 P52 P51 P50 PORT5
FF6H P63 P62 P61 P60 PORT6