COP424C NSC [National Semiconductor], COP424C Datasheet - Page 15

• Manufacturer Part Number: COP424C
• Description: Single-Chip 1k and 2k CMOS Microcontrollers
• Manufacturer: NSC [National Semiconductor]

Mnemonic
MEMORY REFERENCE INSTRUCTIONS (Continued)
STII
X
XAD
XDS
XIS
REGISTER REFERENCE INSTRUCTIONS
CAB
CBA
LBI
LEI
XABR
TEST INSTRUCTIONS
SKC
SKE
SKGZ
SKGBZ
SKMBZ
SKT
Instruction Set
Operand
r d
r d
y
y
0
1
2
3
0
1
2
3
r
r
r
(Continued)
Code
bb
bb
bb
Hex
7
b
b
b
6
4E
23
50
33
33
12
20
21
33
21
33
01
11
03
13
01
11
03
13
41
b
b
6
7
4
Table III COP444C 445C Instruction Set (Continued)
(any r any d)
0111
00 r 0110
0010 0011
1 r
00 r 0111
00
0101 0000
0100 1110
00 r (d –1)
0011 0011
1
0011 0011
0110
0001 0010
0010 0000
0010 0001
0011 0011
0010 0001
0011 0011
0000 0001
0001 0001
0000 0011
0001 0011
0000 0001
0001 0001
0000 0011
0001 0011
0100 0001
Language
d
Machine
(Binary)
(r
(r
(r
e
(r
r
Code
e
e
e
e
0 9 15)
r 0100
or
0 3)
0 3)
0 3)
0 3
d
d
y
y
y
Bd
RAM(B)
Br
RAM(r d)
RAM(B)
Bd
Br
RAM(B)
Bd
Br
A
Bd
r d
y
A
1st byte
2nd byte
Z
b
Z
Z
15
Data Flow
a
a
1
1
r
RAM(B)
EN
r
r
1
Bd
B
A
Br
Br
Bd
Br
Bd
Bd
Br
A
A
A
A
None
None
None
Bd
decrements
past 0
Bd
increments
past 15
None
None
Skip until
not a LBI
None
None
C
A
G
G
G
G
G
RAM(B)
RAM(B)
RAM(B)
RAM(B)
A time-base
counter carry
has occurred
since last test
Conditions
e
e
3 0
0
1
2
3
e
e
e
e
RAM(B)
‘‘1’’
Skip
e
0
0
0
0
0
0
1
2
3
e
e
e
e
0
0
0
0
Store Memory Immediate
1 and Increment Bd
Exchange RAM with A
Exclusive-OR Br with r
Exchange A with RAM
Pointed to Directly by r d
Exchange RAM with A
and Decrement Bd
Exclusive-OR Br with r
Exchange RAM with A
and Increment Bd
Exclusive-OR Br with r
Copy A to Bd
Copy Bd to A
Load B Immediate with r d
(Note 6)
Load EN Immediate (Note 7)
Exchange A with Br (Note 8)
Skip if C is True
Skip if A Equals RAM
Skip if G is Zero
(all 4 bits)
Skip if G Bit is Zero
Skip if RAM Bit is Zero
Skip on Timer
(Note 3)
Description