Control Register File

Table 2−5. Addressing Mode Register (AMR) Field Descriptions (Continued)

Bit

Field

Value

Description

 

 

 

 

3−2

A5 MODE

0−3h

Address mode selection for register file a5.

 

 

0

Linear modification (default at reset)

 

 

1h

Circular addressing using the BK0 field

 

 

2h

Circular addressing using the BK1 field

 

 

3h

Reserved

 

 

 

 

1−0

A4 MODE

0−3h

Address mode selection for register file A4.

 

 

0

Linear modification (default at reset)

 

 

1h

Circular addressing using the BK0 field

 

 

2h

Circular addressing using the BK1 field

 

 

3h

Reserved

 

 

 

 

Table 2−6. Block Size Calculations

BKn Value

Block Size

BKn Value

Block Size

 

 

 

 

00000

2

10000

131 072

00001

4

10001

262 144

00010

8

10010

524 288

00011

16

10011

1 048 576

00100

32

10100

2 097 152

00101

64

10101

4 194 304

00110

128

10110

8 388 608

00111

256

10111

16 777 216

01000

512

11000

33 554 432

01001

1 024

11001

67 108 864

01010

2 048

11010

134 217 728

01011

4 096

11011

268 435 456

01100

8 192

11100

536 870 912

01101

16 384

11101

1 073 741 824

01110

32 768

11110

2 147 483 648

01111

65 536

11111

4 294 967 296

 

 

 

 

Note: When n is 11111, the behavior is identical to linear addressing.

2-12

CPU Data Paths and Control

SPRU733

Page 38
Image 38
Texas Instruments TMS320C67X/C67X+ DSP manual 6. Block Size Calculations, BK n Value Block Size