4501 datasheet(64/116 Pages) RENESAS

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Rev.3.01

2005.02.07

page 64 of 112

REJ03B0104-0301

4501 Group

BM a (Branch and Mark to address a in page 2)

010a6

1aa

–

Grouping:

Subroutine call operation

Description: Call the subroutine in page 2 : Calls the sub-

routine at address a in page 2.

Note:

Subroutine extending from page 2 to another

page can also be called with the BM instruc-

tion when it starts on page 2.

Be careful not to over the stack because the

maximum level of subroutine nesting is 8.

Operation:

(SP)

← (SP) + 1

(SK(SP))

← (PC)

(PCH)

← 2

(PCL)

← a6–a0

BML p, a (Branch and Mark Long to address a in page p)

00110p4

–

Grouping:

Subroutine call operation

Description: Call the subroutine : Calls the subroutine at

address a in page p.

Note:

p is 0 to 15 for M34501M2 and p is 0 to 31

for M34501M4/E4.

Be careful not to over the stack because the

maximum level of subroutine nesting is 8.

Operation:

(SP)

← (SP) + 1

(SK(SP))

← (PC)

(PCH)

← p

(PCL)

← a6–a0

BMLA p (Branch and Mark Long to address (D) + (A) in page p)

0000110000

030

–

Grouping:

Subroutine call operation

Description: Call the subroutine : Calls the subroutine at

address (DR2 DR1 DR0 A3 A2 A1 A0)2 speci-

fied by registers D and A in page p.

Note:

p is 0 to 15 for M34501M2 and p is 0 to 31

for M34501M4/E4.

Be careful not to over the stack because the

maximum level of subroutine nesting is 8.

CLD (CLear port D)

0000010001

011

–

Grouping:

Input/Output operation

Description: Sets (1) to port D.

Operation:

(D)

← 1

100a6

2aa

Operation:

(SP)

← (SP) + 1

(SK(SP))

← (PC)

(PCH)

← p

(PCL)

← (DR2–DR0, A3–A0)

100p4

00p3

2pp

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

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