455A datasheet(89/148 Pages) RENESAS

89 / 148 page

Rev.1.01

Feb 15, 2008

Page 89 of 146

REJ03B0224-0101

455A Group

MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)

B a (Branch to address a)

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

1 a6 a5 a4 a3 a2 a1 a0 2 1

a 16

Opera-

tion:

(PCL)

← a6 to a0

Grouping:

Branch operation

Description: Branch within a page : Branches to address a in the identi-

cal page.

Note:

Specify the branch address within the page including this

instruction.

BL p,a (Branch Long to address a in page p)

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

1 p4 p3 p2 p1 p0 2 0

p 16

1p6 p5 a6 a5 a4 a3 a2 a1 a0 2 2a a 16 Grouping:

Branch operation

Description: Branch out of a page : Branches to address a in page p.

Note:

M3455AG8: p=0 to 63

p6=0

M3455AGC: p=0 to 95

Opera-

tion:

(PCH)

← p

(PCL)

← a6 to a0

BLA p (Branch Long to address (D)+(A) in page p)

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

001

00 2 01 0 16

1p6 p5 p4 00 p3 p2 p1 p0 2 2p p 16 Grouping:

Branch operation

Description: Branch out of a page : Branches to address (DR2 DR1 DR0

A3 A2 A1 A0)2 specified by registers D and A in page p.

Note:

M3455AG8: p=0 to 63

p6=0

M3455AGC: p=0 to 95

Opera-

tion:

(PCH)

← p

(PCL)

← (DR2−R0, A3−A0)

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

Instruc-

tion

code

Number of

words

Number of

cycles

Flag CY

Skip condition

0 a6 a5 a4 a3 a2 a1 a0 2 1a a 16

Opera-

tion:

(SP)

← (SP) + 1

(SK(SP))

← (PC)

(PCH)

← 2

(PCL)

← a6−a0

Grouping:

Subroutine call operation

Description: Call the subroutine in page 2 : Calls the subroutine at

address a in page 2.

Note:

Subroutine extending from page 2 to another page can

also be called with the BM instruction when it starts on

page 2.

Be careful not to over the stack because the maximum

level of subroutine nesting is 8.

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