UPD17P136ACT datasheet(45/292 Pages) NEC

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UPD17P136ACT 데이터시트(PDF) 45 Page - NEC

부품명	UPD17P136ACT

상세설명	4-BIT SINGLE-CHIP MICROCONTROLLER

PDF	292 Pages

Scroll/Zoom	100%

제조업체	NEC [NEC]

홈페이지	http://www.nec.com/

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45 / 292 page

CHAPTER 4 PROGRAM MEMORY (ROM)

<1> Direct subroutine call

When using a direct subroutine call (CALL addr), the 11-bit instruction operand is used to specify a

program memory address of the branched subroutine. (In the case of the

µPD17134A and µPD17135A,

the most significant bit must be 0. If an address is specified outside of this range, an error will occur

in the assembler.)

Example

Figure 4-2. CALL addr Instruction

Note

The program memory of the

µPD17134A and µPD17135A is address 0000H to 03FFH.

<2> Indirect subroutine call

When using an indirect subroutine call (CALL @AR), the value in the address register (AR) should be

an address of the called subroutine. This instruction can be used to branch any address in program

memory.

Also see 7.2 ADDRESS REGISTER (AR).

Address

0000H

Program memory

07FFH

Note

CALL SUB1

RET

SUB1;

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