UPD17P133CS datasheet(81/289 Pages) NEC

tên linh kiện	UPD17P133CS

Giải thích chi tiết về linh kiện	4-BIT SINGLE-CHIP MICROCONTROLLER

PDF	289 Pages

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nhà sản xuất	NEC [NEC]

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CHAPTER 7

SYSTEM REGISTER (SYSREG)

By using these macro instructions, data memory can be handled as flags as shown below in Example 3.

The functions of the program status word and the memory pointer enable flag are defined in bit units (flag units)

and each bit has a reserved word MPE, BCD, CMP, CY, Z and IXE defined for it.

If these flag reserved words are used, the incorporated macro instructions can be used as shown in Example

Example 3.

F0003

FLG 0.00.3

; Flag symbol definition

SET1 F0003

; Incorporated macro

Expanded macro

.MF.F0003 SHR 4, #.DF.F0003 AND 0FH

; Set bit 3 of address 00H of BANK0

Example 4.

SET1 BCD

; Incorporated macro

Expanded macro

.MF.BCD SHR 4, #.DF.BCD AND 0FH

; Set the BCD flag

; BCD is defined as "BCD FLG 0.7EH.0"

CLR2 Z, CY

; Identical address flag

Expanded macro

AND

.MF.Z SHR 4, #.DF. (NOT (Z OR CY) AND 0FH)

CLR2 Z, BCD

; Different address flag

Expanded macro

AND

.MF.Z SHR 4, #.DF. (NOT Z AND 0FH)

AND

.MF.BCD SHR 4, #.DF. (NOT BCD AND 0FH)

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