4524 Datasheet, PDF (94/161 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

4524 Group
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
BM a (Branch and Mark to address a in page 2)
Instruction
code
D9
D0
Number of Number of Flag CY
0
1
0
a6 a5 a4 a3 a2 a1 a0 1
2
a
a
16
words
1
cycles
1
–
Skip condition
–
Operation:
(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 an-
other 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.
BML p, a (Branch and Mark Long to address a in page p)
Instruction
code
D9
D0
Number of
0
0
1
1
0
p4 p3 p2 p1 p0
2
0
C
+p
p
16
words
2
2p
1 p6 p5 a6 a5 a4 a3 a2 a1 a0 _{2 +p +a} a _{16 Grouping:}
Number of Flag CY
cycles
2
–
Skip condition
–
Subroutine call operation
Operation:
(SP) ← (SP) + 1
(SK(SP)) ← (PC)
(PCH) ← p
(PCL) ← a6–a0
Description: Call the subroutine : Calls the subroutine at
address a in page p.
Note:
p is 0 to 63 for M34524M8, and p is 0 to 95
for M34524MC, and p is 0 to 127 for
M34524ED.
Be careful not to over the stack because the
maximum level of subroutine nesting is 8.
BMLA p (Branch and Mark Long to address (D) + (A) in page p)
Instruction
code
D9
D0
Number of Number of Flag CY Skip condition
0000110000
030
words
cycles
2
16
2
2
–
–
2
1 p6 p5 p4 0 0 p3 p2 p1 p0 _{2 +p} p p _{16 Grouping:}
Subroutine call operation
Operation:
(SP) ← (SP) + 1
(SK(SP)) ← (PC)
(PCH) ← p
(PCL) ← (DR2–DR0, A3–A0)
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 63 for M34524M8, and p is 0 to 95 for
M34524MC, and p is 0 to 127 for M34524ED.
Be careful not to over the stack because the
maximum level of subroutine nesting is 8.
CLD (CLear port D)
Instruction
code
D9
D0
Number of Number of Flag CY
0000010001
011
words
cycles
2
16
1
1
–
Skip condition
–
Operation: (D) ← 1
Grouping: Input/Output operation
Description: Sets (1) to port D.
Rev.2.00 Jul 27, 2004 page 94 of 159
REJ03B0091-0200Z