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2.4.15 Clock Status Register (CKSTAT)

PLL Controller

The clock status register (CKSTAT) is shown in Figure 18 and described in Table 24 . CKSTAT shows

clock status for all clocks, except SYSCLK n.

Figure 18. Clock Status Register (CKSTAT)

31 16

Reserved

R-0

15 4 3 2 1 0

Reserved BPON Rsvd OBSON AUXON

R-0 R-1 R-0 R-0 or 1

(1)

R-0 or 1

(2)

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

(1)

For PLLC1, OBSON defaults to 1; for PLLC2, OBSON is reserved and defaults to 0.

(2)

For PLLC1, AUXON defaults to 1; for PLLC2, AUXON is reserved and defaults to 0.

Table 24. Clock Status Register (CKSTAT) Field Descriptions

Bit Field Value Description

31-4 Reserved 0 Reserved

3 BPON SYSCLKBP on status. SYSCLKBP is controlled in the bypass divider register (BPDIV).

0 SYSCLKBP is off.

1 SYSCLKBP is on.

2 Reserved 0 Reserved

1 OBSON OBSCLK on status. OBSCLK is controlled in the oscillator divider 1 register (OSCDIV1) and by the

OBSEN bit in the clock enable control register (CKEN). Not applicable on PLLC2 (this bit is reserved).

0 OBSCLK is off.

1 OBSCLK is on.

0 AUXON AUXCLK on status. AUXCLK is controlled by the AUXEN bit in the clock enable control register

(CKEN). Not applicable on PLLC2 (this bit is reserved).

0 AUXCLK is off.

1 AUXCLK is on.

32 Phase-Locked Loop Controller (PLLC) SPRUES0B – December 2007

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Texas-instruments TMS320C642x DSP Manual de usuario Pagina 32