LP5569 datasheet(37/86 Pages) TI1

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LP5569

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SNVSAP8 – JULY 2017

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(1)

This opcode is used with numerical operands

(2)

This opcode is used with variables.

8.5.2.7 Data Transfer and Arithmetic Instructions

Table 13. LP5569 Data Transfer and Arithmetic Instructions

INST.

Bit

[15]

Bit

[14]

Bit

[13]

Bit

[12]

Bit

[11]

Bit

[10]

Bit [9] Bit [8]

Bit

[7]

Bit [6] Bit [5] Bit [4] Bit [3] Bit [2] Bit [1] Bit [0]

target

variable

8-bit value 0

add(1)

target

variable

8-bit value 0

add(2)

target

variable

var 1

var 2

sub(1)

target

variable

sub(2)

target

variable

var 1

var 2

8.5.2.7.1

This instruction is used to assign a value into a variable; the previous value in that variable is overwritten. Each

of the engines has two local variables, called A and B. The variable C is a global variable.

NAME

VALUE (d)

DESCRIPTION

target variable

0–2

0 = Variable A

1 = Variable B

2 = Variable C

8-bit value

0–255

Variable value

(1)

Valid for numerical operands.

(2)

Valid for variables.

8.5.2.7.2

ADD

This operator either adds an 8-bit value to the current value of the target variable, or adds the value of variable 1

(A, B, C, or D) to the value of variable 2 (A, B, C, or D) and stores the result in the register of variable A, B, or C.

Variables overflow from 255 to 0.

NAME

VALUE (d)

DESCRIPTION

8-bit value(1)

0–255

The value to be added.

target variable

0–2

0 = Variable A

1 = Variable B

2 = Variable C

variable 1(2)

0–3

0 = Local variable A

1 = Local variable B

2 = Global variable C

3 = Global variable D

variable 2(2)

0–3

0 = Local variable A

1 = Local variable B

2 = Global variable C

3 = Global variable D

8.5.2.7.3

SUB

The SUB operator either subtracts an 8-bit value from the current value of the target variable, or subtracts the

value of variable 2 (A, B, C, or D) from the value of variable 1 (A, B, C, or D) and stores the result in the register

of the target variable (A, B, or C). Variables overflow from 0 to 255.

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