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SRIO Registers

5.15SERDES Macro Configuration Register n (SERDES_CFGn_CNTL)

There are four of these registers, to support four ports.

Figure 71. SERDES Macros CFG (0-3) Registers (SERDES_CFGn_CNTL)

31

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16

 

 

 

 

 

 

 

Reserved

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

R-0

 

 

 

 

 

 

 

15

14

13

12

11

10

9

8

7

6

5

4

3

2

1

0

 

 

Reserved

 

 

LB

 

Reserved

 

 

MPY

 

 

ENPLL

 

 

 

R-0

 

 

R/W-0

 

 

R-0

 

 

R/W-0

 

 

R/W-0

LEGEND: R = Read, W = Write, n = value at reset

Table 45. SERDES Macros CFG (0-3) Registers (SERDES_CFGn_CNTL) Field Descriptions

Bit

Field

Value

Description

31:10

Reserved

 

Reserved.

9:8

LB

 

Loop bandwidth. Specify loop bandwidth settings.

 

 

00

Frequency dependent bandwidth. The PLL bandwidth is set to a twelfth of the frequency of

 

 

 

RIOCLK/RIOCLK.

 

 

01

Reserved

 

 

10

Low bandwidth. The PLL bandwidth is set to a twentieth of the frequency of RIOCLK/RIOCLK, or

 

 

 

3MHz (whichever is larger).

 

 

11

High bandwidth. The PLL bandwidth is set to a eighth of the frequency of RIOCLK/RIOCLK.

7:6

Reserved

 

Reserved.

5:1

MPY

 

PLL multiply. Select PLL multiply factors between 4 and 60.

 

 

0000

4x

 

 

0001

5x

 

 

0010

6x

 

 

0011

Reserved

 

 

0100

8x

 

 

0101

10x

 

 

0110

12x

 

 

0111

12.5x

 

 

1000

15x

 

 

1001

20x

 

 

1010

25x

 

 

1011

Reserved

 

 

1100

Reserved

 

 

1101

50x

 

 

1110

60x

 

 

1111

Reserved

0

ENPLL

 

Enable PLL. Enables the PLL.

116

Serial RapidIO (SRIO)

SPRU976 –March 2006

 

 

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Texas Instruments TMS320C645x manual Serdes Macro Configuration Register n SERDESCFGnCNTL, MPY Enpll, Rioclk/Rioclk, Mpy