DM-COP8/20D National Semiconductor, DM-COP8/20D Datasheet - Page 97
DM-COP8/20D
Manufacturer Part Number
DM-COP8/20D
Description
CABLE FOR DEBUG MODULE 20-DIP
Manufacturer
National Semiconductor
Datasheet
1.DM-COP820D.pdf
(254 pages)
Specifications of DM-COP8/20D
Accessory Type
20-DIP Target Cable
For Use With/related Products
MetaLink Debug Module
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
*DM-COP8/20D
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obtained from a table stored in program memory, with the Accumulator serving as the
low order byte of a pointer into program memory. For purposes of accessing program
memory, the contents of the Accumulator are written to PCL (temporarily). The data
pointed to by the Program Counter (PCH/PCL) is loaded into PCL, while PCH remains
unchanged.
The VIS instruction is a special case of the Indirect Transfer of Control addressing mode,
where the double-byte vector associated with the interrupt is transferred from adjacent
addresses in program memory into the Program Counter in order to jump to the
associated interrupt service routine.
Example:
Jump Indirect
JID
Accumulator
Reg/Memory
0126 Hex
Location
Memory
PCU
PCL
Contents
C4 Hex
01 Hex
26 Hex
32 Hex
Before
Contents
01 Hex
32 Hex
26 Hex
32 Hex
After
COP8SAx7 MICROCONTROLLER
2-59
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