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MC146805E2 Scheda tecnica(PDF) 7 Page - InnovASIC, Inc

Il numero della parte MC146805E2
Spiegazioni elettronici  Microprocessor Unit
Download  31 Pages
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Produttore elettronici  INNOVASIC [InnovASIC, Inc]
Homepage  http://www.innovasic.com
Logo INNOVASIC - InnovASIC, Inc

MC146805E2 Scheda tecnica(HTML) 7 Page - InnovASIC, Inc

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IA6805E2
Data Sheet
Microprocessor Unit
As of Production Version 00
Copyright
© 2002
ENG21108140100
www.innovasic.com
innovASIC
Customer Support:
The End of Obsolescence
Page 7 of 31
1-888-824-4184
Registers:
The following paragraphs describe the registers contained in the MPU. Figure 6 shows the
programming model and Figure 7 shows the interrupt stacking order.
NOTE: Since the stack pointer decrements during pushes, the PCL is stacked first,
followed by PCH, etc. Pulling from the stack is in the reverse order.
CONDITION CODE
REGISTER
ACCUMULATOR
INDEX REGISTER
1
1
1
I
N
T
E
R
R
U
P
T
DECREASING MEMORY
ADDRESSES
STACK
PCH
0
0
0
PCL
R
E
T
U
R
N
INCREASING MEMORY
ADDRESSES
UNSTACK
A
X
SP
1
0
0
0
0
0
0
H
I
N
Z
C
7
0
CC
CONDITION CODE REGISTER
CARRY/BORROW
HALF CARRY
INTERRUPT MASK
NEGATIVE
ZERO
STACK POINTER
PROGRAM COUNTER
INDEX REGISTER
ACCUMULATOR
7
0
12
0
7
8
PCH
PCL
12
6
0
4
0
Figure 6. Programming Model
Figure 7. Interrupt Stacking Order


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