Section 1.4.4.3, Section 1.4.4.4 – Texas Instruments TMS3320C5515 User Manual

Page 31

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System Clock Generator

1.4.4.3

Clock Generator Control Register 3 (CGCR3) [1C22h]

The clock generator control register 3 (CGCR3) is shown in

Figure 1-8

and described in

Table 1-15

.

Figure 1-8. Clock Generator Control Register 3 (CGCR3) [1C22h]

15

0

INIT

R/W-0806h

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

Table 1-15. Clock Generator Control Register 3 (CGCR3) Field Descriptions

Bit

Field

Value

Description

15-0

INIT

0x0806h

Initialization bits for the DSP clock generator. These bits are used for testing purposes and
must be initialized with 0x806 during PLL configuration for proper operation of the PLL.

1.4.4.4

Clock Generator Control Register 4 (CGCR4) [1C23h]

The clock generator control register 4 (CGCR4) is shown in

Figure 1-9

and described in

Table 1-16

.

Figure 1-9. Clock Generator Control Register 4 (CGCR4) [1C23h]

15

10

9

8

7

0

Reserved

OUTDIVEN

Reserved

ODRATIO

R-0

R/W-0

R-0

R/W-0

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

Table 1-16. Clock Generator Control Register 4 (CGCR4) Field Descriptions

Bit

Field

Value

Description

15-10

Reserved

0

Reserved.

9

OUTDIVEN

Output divider enable bit. This bit determines whether the output divider of the PLL is are
enabled or bypassed.

0

The output divider is bypassed.

1

The output divider is enabled.

8

Reserved

0

Reserved.

7-0

ODRATIO

0-FFh

Divider ratio bits for the output divider of the PLL.

Divider value = ODRATIO + 1.

31

SPRUFX5A – October 2010 – Revised November 2010

System Control

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