參數(shù)資料
型號: 4571
廠商: Renesas Technology Corp.
英文描述: SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
中文描述: 單芯片4位微機的CMOS
文件頁數(shù): 101/126頁
文件大?。?/td> 1627K
代理商: 4571
Rev.1.02
May 25, 2007
Page 76 of 124
REJ03B0179-0102
4571 Group
MACHINE INSTRUCTIONS (INDEX BY ALPHABET) (continued)
IAP2
(Input Accumulator from port P2)
Instruc-
tion
code
D9
D0
Number of
words
Number of
cycles
Flag CY
Skip condition
1
0
110
00
10 2 26 2 16
11
-
Opera-
tion:
(A1, A0)
(P21, P20)
(A3, A2)
0
Grouping:
Input/Output operation
Description: Transfers the input of port P2 to the low-order 2 bits (A1,
A0) of register A.
“0” is stored to the high-order 2 bits (A3, A2) of register A.
IAP3
(Input Accumulator from port P3)
Instruc-
tion
code
D9
D0
Number of
words
Number of
cycles
Flag CY
Skip condition
1
0
110
00
11 2 26 3 16
11
-
Opera-
tion:
(A1, A0)
(P31, P30)
(A3, A2)
0
Grouping:
Input/Output operation
Description: Transfers the input of port P3 to the low-order 2 bits (A1,
A0) of register A.
“0” is stored to the high-order 2 bits (A3, A2) of register A.
INY
(INcrement register Y)
Instruc-
tion
code
D9
D0
Number of
words
Number of
cycles
Flag CY
Skip condition
0
001
00
11 2 01 3 16
11
-
(Y) = 0
Opera-
tion:
(Y)
(Y) + 1
Grouping:
RAM addresses
Description: Adds 1 to the contents of register Y. As a result of addition,
when the contents of register Y is 0, the next instruction is
skipped. When the contents of register Y is not 0, the next
instruction is executed.
LA n
(Load n in Accumulator)
Instruc-
tion
code
D9
D0
Number of
words
Number of
cycles
Flag CY
Skip condition
0
111
nn
nn 2 07 n 16
11
-
Continuous
description
Opera-
tion:
(A)
n
n = 0 to 15
Grouping:
Arithmetic operation
Description: Loads the value n in the immediate field to register A.
When the LA instructions are continuously coded and exe-
cuted, only the first LA instruction is executed and other LA
instructions coded continuously are skipped.
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