COP8CCR9IMT7SLASHNOPB datasheet(92/111 Pages) TI1

92 / 111 page

COP8CBR9, COP8CCR9, COP8CDR9

SNOS535I – OCTOBER 2000 – REVISED MARCH 2013

www.ti.com

Reg/Data

Contents

Memory

Before

After

Memory Location

62 Hex

03 Hex

0005 Hex

B Pointer

05 Hex

06 Hex

Intermediate. The data for the operation follows the instruction opcode in program memory. In assembly

language, the number sign character (#) indicates an immediate operand.

Example:

Load Accumulator Immediate

LD A,#05

Reg/Data

Contents

Memory

Before

After

Accumulator

XX Hex

05 Hex

Immediate Short. This is a special case of an immediate instruction. In the “Load B immediate”

instruction, the 4-bit immediate value in the instruction is loaded into the lower nibble of the B register. The

upper nibble of the B register is reset to 0000 binary.

Example:

Load B Register Immediate Short

LD B,#7

Reg/Data

Contents

Memory

Before

After

B Pointer

12 Hex

07 Hex

Indirect from Program Memory. This is a special case of an indirect instruction that allows access to

data tables stored in program memory. In the “Load Accumulator Indirect” (LAID) instruction, the upper

and lower bytes of the Program Counter (PCU and PCL) are used temporarily as a pointer to program

memory. For purposes of accessing program memory, the contents of the Accumulator and PCL are

exchanged. The data pointed to by the Program Counter is loaded into the Accumulator, and

simultaneously, the original contents of PCL are restored so that the program can resume normal

execution.

Example:

Load Accumulator Indirect

LAID

Reg/Data

Contents

Memory

Before

After

PCU

04 Hex

PCL

35 Hex

36 Hex

Accumulator

1F Hex

25 Hex

Memory Location

25 Hex

041F Hex

5.19.3.2 Tranfer-of-Control Addressing Modes

Program instructions are usually executed in sequential order. However, Jump instructions can be used to

change the normal execution sequence. Several transfer-of-control addressing modes are available to

specify jump addresses.

Functional Description

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