Texas Instruments TMS320C2XX User Manual

Page 237

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LDP

Load Data Page Pointer

7-84

Cycles for a Single LDP Instruction (Using Direct and Indirect Addressing)

Program

Operand

ROM

DARAM

SARAM

External

DARAM

2

2

2

2+p

code

SARAM

2

2

2, 3

†

2+p

code

External

2+d

src

2+d

src

2+d

src

3+d

src

+p

code

† If the operand and the code are in the same SARAM block

Cycles for a Repeat (RPT) Execution of an LDP Instruction (Using Direct and

Indirect Addressing)

Program

Operand

ROM

DARAM

SARAM

External

DARAM

2n

2n

2n

2n+p

code

SARAM

2n

2n

2n, 2n+1

†

2n+p

code

External

2n+nd

src

2n+nd

src

2n+nd

src

2n+1+nd

src

p

code

† If the operand and the code are in the same SARAM block

Cycles for a Single LDP Instruction (Using Short Immediate Addressing)

ROM

DARAM

SARAM

External

2

2

2

2+p

code

Example 1

LDP

127

;(DP = 511: addresses FF80h–FFFFh)

Before Instruction

After Instruction

Data Memory

Data Memory

FFFFh

FEDCh

FFFFh FEDCh

DP

1FFh

DP

0DCh

Example 2

LDP

#0h

Before Instruction

After Instruction

DP

1FFh

DP

0h

Example 3

LDP

*,AR5

Before Instruction

After Instruction

ARP

4

ARP

5

AR4

300h

AR4

300h

Data Memory

Data Memory

300h

06h

300h

06h

DP

1FFh

DP

06h

Cycles

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