COP8AME9_14 Datasheet, PDF (87/102 Pages) Texas Instruments – COP8AME9 8-Bit CMOS Flash Microcontroller with 8k Memory, Dual Op Amps, Virtual EEPROM, Temperature Sensor, 10-Bit A/D and Brownout Reset

COP8AME9, COP8ANE9
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SNOS930F – MARCH 2001 – REVISED MARCH 2013
Jump Indirect. In this 1-byte instruction, the lower byte of the jump address is 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.
Example: Jump Indirect
JID
Reg/
Memory
PCU
PCL
Accumulator
Memory
Location
0126 Hex
Contents
Before
01 Hex
C4 Hex
26 Hex
32 Hex
Contents
After
01 Hex
32 Hex
26 Hex
32 Hex
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.
INSTRUCTION TYPES
The instruction set contains a wide variety of instructions. The available instructions are listed below, organized
into related groups.
Some instructions test a condition and skip the next instruction if the condition is not true. Skipped instructions
are executed as no-operation (NOP) instructions.
Arithmetic Instructions
The arithmetic instructions perform binary arithmetic such as addition and subtraction, with or without the Carry
bit.
Add (ADD)
Add with Carry (ADC)
Subtract with Carry (SUBC)
Increment (INC)
Decrement (DEC)
Decimal Correct (DCOR)
Clear Accumulator (CLR)
Set Carry (SC)
Reset Carry (RC)
Transfer-of-Control Instructions
The transfer-of-control instructions change the usual sequential program flow by altering the contents of the
Program Counter. The Jump to Subroutine instructions save the Program Counter contents on the stack before
jumping; the Return instructions pop the top of the stack back into the Program Counter.
Jump Relative (JP)
Jump Absolute (JMP)
Jump Absolute Long (JMPL)
Jump Indirect (JID)
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