SM320C6455-EP

FIXED-POINT DIGITAL SIGNAL PROCESSOR

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SPRS462B – SEPTEMBER 2007 – REVISED JANUARY 2008

7.8.3.2 PLL Controller Command Register

The PLL controller command register (PLLCMD) contains the command bit for GO operation. PLLCMD is shown in Figure 7-25and described in Table 7-34.

31

 

 

 

 

16

 

 

 

Reserved

 

 

 

 

 

R-0

 

 

15

 

 

2

1

0

 

 

 

Reserved

Rsvd

GOSET

 

 

 

R-0

R/W-0

R/W-0

LEGEND: R/W = Read/Write; R = Read only; -n= value after reset

 

 

 

Figure 7-25. PLL Controller Command Register (PLLCMD) [Hex Address: 029C 0138]

 

 

Table 7-34. PLL Controller Command Register (PLLCMD) Field Descriptions

 

 

Bit

Field

Value

Description

 

 

31:2

Reserved

0

Reserved. The reserved bit location is always read as 0. A value written to this field has no effect.

1

Reserved

 

Reserved. The reserved bit location is always read as 0. A value written to this field has no effect.

0

GOSET

 

GO operation command for SYSCLK rate change and phase alignment. Before setting this bit to 1

 

 

 

to initiate a GO operation, check the GOSTAT bit in the PLLSTAT register to ensure all previous

 

 

 

GO operations have completed.

 

 

 

 

0

No effect. Write of 0 clears bit to 0.

 

 

1Initiates GO operation. Write of 1 initiates GO operation. Once set, GOSET remains set but further writes of 1 can initiate the GO operation.

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