NEC PD75402A - Manual (Page 59)

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CHAPTER 5. PERIPHERAL HARDWARE FUNCTIONS
(1) Bit handling instructions
Direct addressing of specific address bits (fmem.bit) can be used on all digital input/output ports.
Example To OR P50 and P31 and output the result to P61.
SET1 CY ; CY
←
1
AND1 CY, PORT5.0 ; CY
←
CY
∧
P50
OR1 CY, PORT3.1 ; CY
←
CY
∨
P31
SKT CY
BR CLRP
SET1 PORT6.1 ; P61
←
1
CLRP : CLR1 PORT6.1 ; P61
←
0
(2) 4-bit handling instructions
All 4-bit memory handling instructions can be used, such as MOV, XCH, ADDS and INCS, in addition to the IN/
OUT instructions.
Example 1. To output accumulator contents to port 3.
OUT PORT3, A
2. To add the accumulator value to the data output to port 5, and output the result.
MOV HL, #PORT5
ADDS A, @HL ; A
←
A + PORT5
NOP
MOV @HL, A ; PORT5
←
A
Table 5-2 List of Input/Output Pin Handling Instructions
………
PORT 0 PORT 1 PORT2 PORT 3 PORT5 PORT 6
IN A, PORTn ● ●
OUT PORTn, A – – ● ●
SET1 PORTn.bit – – ● ●
CLR1 PORTn.bit – – ● ●
SKT PORTn.bit ● ●
SKF PORTn.bit ● ●
AND1 CY, PORTn.bit ● ●
OR1 CY, PORTn.bit ● ●
XOR1 CY, PORTn.bit ● ●