MC6800 Motorola, MC6800 Datasheet - Page 27

• Manufacturer Part Number: MC6800
• Description: 8-BIT MICROPROCESSING UNIT (MPU)
• Manufacturer: Motorola

1
[
ADC
ADD
AND
BIT
CMP
CPX
ADC
ADD
AND
CMP
CPX
LDS
LDX
BIT
LDS
STS
STX
Pc
LDX
GENERAL
%
Note 1. If device which is address during this cvcle uses VMA,
FIGURE =
PROGRAM
and 1 nstructions
and Instructions
MEMORY
Address Mode
Address Mode
INSTR
ORA
SBC
SUB
ORA
SBC
SUB
DATA
EOR
LDA
EOR
LDA
MPU
RAM
Depending
FLOW
–
IMMEDIATE ADDRESSING
,,
I
on bus capacitance,
B
Cycles
Cycles
2
3
5
‘C=’oo’w
,a.\’.
>.,.. . .., ..~~
\,.
MOTOROLA
t:~
~~ ,
Cycle
‘*.,
2
#
1
1
2
3
4
4
1
3
1
2
3
4
5
m
EXAMPLE
,.
!.~:
m
PROGRAM
MEMORY
ACCA
VMA
MPU
data from the previous cycle may be retained on the Data Bus.
Line
RAM
1
1
1
1
1
1
1
0
1
0
1
1
1
1
MODE
Op Code Address
Op Code Address+
Op Code A@dress *’”
OP
OD C&&hress
Op Code Address
Op Code Address+
Op Code Address
Op Code Address + 1
Address of Operand
Address of Operand
Operand
Op Code Address
Op Code Address + 1
Op Code Address
Destination
Destination
OP Code Address+
Address of Operand
Address of Operand
Address of Operand
CodaL$dd~ss
II
Address + 1
,,,:, ..:..i.~,
Address
Address
Addrass Bus
Addres Bus
then
+ 1
+ 2
27
Semiconductor
“ ‘~!-’::...
1 ‘~+?<q,~’~
1
1
the
~..,?t.,,
+ 1
,,. , .,,,,,
‘~ !’$.,,..
.Q,.
Data BUS
~\
.es”’$% ‘“
ADOR
‘C’*
.f’’’*,..,
,1?,’
m
*
PROGRAM
MEMORY
WIII
?!i<,,l>;
FIGURE 30 –
DATA
MPU
RAM
.\.!),,
go to ?ne nigh
R/~
Line
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
o
o
0
1
1
1
Products Inc.
DIRECT ADDRESSING
Op Code
Operand
Op Code
Operand
Oparand
Op Code
Address of Operand
Operand
Op Code
Address of Operand
Operand
Operand
Op Code
Destination
irrelevant
Data from Accumulator
Op Code
Address of Operand
Irrelevant
Register Oata (High Order Byte)
Register Data (Low Ordar BVte)
impeaance
,.,
Data
Data
Data (High Order Byte)
Data (Low Order Byte)
Data (High Order Byte)
Data (Low Order Byte)
Data (Note 1 }
Data (Note 1 )
Address
tnree-s~aIe
Data Bus
Data Bus
G
m
EXAMPLE
ACCA
MPU
RAM
MODE
conolrlon.
,.. .