beautypg.com

Texas Instruments TMS320C2XX User Manual

Page 199

background image

BIT

Test Bit

7-46

Cycles for a Single BIT Instruction

Program

Operand

ROM

DARAM

SARAM

External

DARAM

1

1

1

1+p

SARAM

1

1

1, 2

1+p

External

1+d

1+d

1+d

2+d+p

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

Cycles for a Repeat (RPT) Execution of a BIT Instruction

Program

Operand

ROM

DARAM

SARAM

External

DARAM

n

n

n

n+p

SARAM

n

n

n, n+1

n+p

External

n+nd

n+nd

n+nd

n+1+p+nd

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

Example 1

BIT

0h,15

;(DP = 6). Test LSB at 300h

Before Instruction

After Instruction

Data Memory

Data Memory

300h

4DC8h

300h

4DC8h

TC

0

TC

0

Example 2

BIT

*,0,AR1

;Test MSB at 310h, then set ARP = 1

Before Instruction

After Instruction

ARP

0

ARP

1

AR0

310h

AR0

310h

Data Memory

Data Memory

310h

8000h

310h

8000h

TC

0

TC

1

Cycles