COP8SA-DM National Semiconductor, COP8SA-DM Datasheet - Page 97

• Manufacturer Part Number: COP8SA-DM
• Description: MODULE DEBUGGING FOR COP8SA
• Manufacturer: National Semiconductor

Specifications of COP8SA-DM

• Module/board Type: Debugger Module
• For Use With/related Products: Cop 8
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: *COP8SA-DM

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
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