EM78860
8-BIT MICRO-CONTROLLER
It is very important to save ACC,R3 and R5 when processing a interruption.
Address
Instruction
Note
0x08
0x09
0x0A
0x0B
0x0C
0x0D
0x0E
:
:
:
:
:
:
:
:
DISI
;Disable interrupt
;Save ACC
MOV A_BUFFER,A
SWAP A_BUFFER
SWAPA 0x03
MOV R3_BUFFER,A
MOV A,0x05
MOV R5_BUFFER,A
:
;Save R3 status
;Save ROM page register
:
MOV A,R5_BUFFER
MOV 0X05,A
SWAPA R3_BUFFER
MOV 0X03,A
SWAPA A_BUFFER
RETI
;Return R5
;Return R3
;Return ACC
Instruction Set
Instruction set has the following features:
(1). Every bit of any register can be set, cleared, or tested directly.
(2). The I/O register can be regarded as general register. That is, the same instruction can operates on I/O register.
The symbol “R” represents a register designator which specifies which one of the 64 registers (including
operational registers and general purpose registers) is to be utilized by the instruction. Bits 6 and 7 in R4
determine the selected register bank. “b’’ represents a bit field designator which selects the number of the
bit, located in the register “R’’, affected by the operation. “k’’ represents an 8 or 10-bit constant or literal
value.
INSTRUCTION BINARY
HEX
MNEMONIC
OPERATION
STATUS
AFFECTED
None
C
None
T,P
0
0
0
0
0
0
0
0
0
0
0000 0000 0000
0000 0000 0001
0000 0000 0010
0000 0000 0011
0000 0000 0100
0000 0000 rrrr
0000 0001 0000
0000 0001 0001
0000 0001 0010
0000 0001 0011
0000
0001
0002
0003
0004
000r
0010
0011
0012
0013
NOP
No Operation
Decimal Adjust A
A CONT
0 WDT, Stop oscillator
0 WDT
A IOCR
Enable Interrupt
Disable Interrupt
[Top of Stack] PC
[Top of Stack] PC
Enable Interrupt
CONT A
IOCR A
R2+A R2 bits 9,10 do not clear
A R
DAA
CONTW
SLEP
WDTC
IOW R
ENI
DISI
RET
RETI
T,P
None
None
None
None
None
None
None
Z,C,DC
None
Z
0
0
0
0
0
0
0
0
0000 0001 0100
0000 0001 rrrr
0000 0010 0000
0000 01rr rrrr
0000 1000 0000
0000 11rr rrrr
0001 00rr rrrr
0001 01rr rrrr
0014
001r
0020
00rr
0080
00rr
01rr
01rr
CONTR
IOR R
TBL
MOV R,A
CLRA
CLR R
0 A
0 R
Z
SUB A,R
SUB R,A
R-A A
R-A R
Z,C,DC
Z,C,DC
* This specification are subject to be changed without notice.
16
6.24.1998
ELAN [ ELAN MICROELECTRONICS CORP ]
