138
TMS320C6670 Peripheral Information and Electrical Specifications
Copyright 2012 Texas Instruments Incorporated
SPRS689D—March 2012
Multicore Fixed and Floating-Point System-on-Chip
TMS320C6670
7.5.3 Main PLL Control Registers
The Main PLL uses two chip-level registers (MAINPLLCTL0 and MAINPLLCTL1) along with the PLL Controller
for its configuration. These MMRs (memory-mapped registers) exist inside the Bootcfg space. To write to these
registers, software should go through an un-locking sequence using KICK0/KICK1 registers. For valid configurable
values of the MAINPLLCTL registers, see Section 2.4.3
on page 35. See Section
Mechanism (KICK0 and KICK1) Register’’
for the address location of the KICK registers and their
locking and unlocking sequences. These registers reset only on a POR reset. See
and
MAINPLLCTL0 details and
for MAINPLLCTL1 details.
Figure 7-17
Main PLL Control Register (MAINPLLCTL0)
31
24
23
19
18
12
11
6
5
0
BWADJ[7:0]
Reserved
PLLM[12:6]
Reserved
PLLD
RW,+0000 0101
RW - 0000 0
RW,+0000000
RW, +000000
RW,+000000
Legend: RW = Read/Write; -
n
= value after reset
Table 7-24
Main PLL Control Register (MAINPLLCTL0) Field Descriptions
Bit
Field
Description
31-24
BWADJ[7:0]
BWADJ[11:8] and BWADJ[7:0] are located in MAINPLLCTL0 and MAINPLLCTL1 registers. BWADJ[11:0] should be
programmed to a value equal to half of PLLM[12:0] value (round down if PLLM has an odd value) Example: If PLLM = 15,
then BWADJ = 7
23-19
Reserved
Reserved
18-12
PLLM[12:6]
A 13-bit field that selects the values for the multiplication factor (see note below)
11-6
Reserved
Reserved
5-0
PLLD
A 6-bit field that selects the values for the reference divider
End of Table 7-24
Figure 7-18
Main PLL Control Register (MAINPLLCTL1)
31
7
6
5
4
3
0
Reserved
ENSAT
Reserved
BWADJ[11:8]
RW - 0000000000000000000000000
RW - 0
RW- 00
RW- 0000
Legend: RW = Read/Write; -
n
= value after reset
Table 7-25
Main PLL Control Register (MAINPLLCTL1) Field Descriptions
Bit
Field
Description
31-7
Reserved
Reserved
6
ENSAT
Needs to be set to 1 for proper operation of the Main PLL
5-4
Reserved
Reserved
3-0
BWADJ[11:8]
BWADJ[11:8] and BWADJ[7:0] are located in MAINPLLCTL0 and MAINPLLCTL1 registers. BWADJ[11:0] should be
programmed to a value equal to half of PLLM[12:0] value (round down if PLLM has an odd value) Example: If PLLM = 15,
then BWADJ = 7
End of Table 7-25
Содержание TMS320C6670
Страница 225: ......