CHAPTER 9. INSTRUCTION SET

(3) Description of addressing area field symbols

* 1

MB = 0

 

* 2

MB = 0 (00H to 3FH)

Data memory

 

MB = 15 (80H to FFH)

 

addressing

 

 

* 3

MB = 15, fmem = FB0H to FBFH,

 

 

FF0H to FFFH

 

* 4

addr = 000H to 77FH

 

* 5

addr = (Current PC) – 15 to (Current PC) – 1,

 

 

(Current PC) + 16 to (Current PC) + 2

Program memory

 

addressing

 

 

* 6

caddr = 000H to 77FH

 

* 7

faddr = 000H to 77FH

 

Remarks 1. MB is the accessible memory bank.

2.*4 to *7 are the addressable areas.

(4)Description of machine cycle field

S is the number of machine cycles required when the skip operation is performed by an instruction with skip. The value of S changes as follows:

Do not skip next instruction ..... S = 0

Skip next instruction ................. S = 1

One machine cycle equals one cycle of CPU clock Φ. Three times can be selected by PCC setting. (See section 5.2.2(1).)

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NEC PD75402A, PD75P402 user manual Description of addressing area field symbols, Description of machine cycle field, 152