SPRS814D March 2012 – October 2019 TMS320C6655 , TMS320C6657
PRODUCTION DATA.
请参考 PDF 数据表获取器件具体的封装图。
The PLL default settings are determined by the BOOTMODE[12:10] bits. Table 6-100 shows settings for various input clock frequencies.
BOOTMODE [12:10] | INPUT CLOCK FREQ (MHz) | 850 MHz DEVICE | 1000 MHz DEVICE | 1250 MHz DEVICE | ||||||
---|---|---|---|---|---|---|---|---|---|---|
PLLD | PLLM | DSP ƒ | PLLD | PLLM | DSP ƒ | PLLD | PLLM | DSP ƒ | ||
0b000 | 50.00 | 0 | 33 | 850 | 0 | 39 | 1000 | 0 | 49 | 1250 |
0b001 | 66.67 | 1 | 50 | 850.04 | 0 | 29 | 1000.05 | 1 | 74 | 1250.063 |
0b010 | 80.00 | 3 | 84 | 850 | 0 | 24 | 1000 | 3 | 124 | 1250 |
0b011 | 100.00 | 0 | 16 | 850 | 0 | 19 | 1000 | 0 | 24 | 1250 |
0b100 | 156.25 | 49 | 543 | 850 | 4 | 63 | 1000 | 0 | 15 | 1250 |
0b101 | 250.00 | 4 | 33 | 850 | 0 | 7 | 1000 | 0 | 9 | 1250 |
0b110 | 312.50 | 49 | 271 | 850 | 4 | 31 | 1000 | 0 | 7 | 1250 |
0b111 | 122.88 | 5 | 82 | 849.92 | 28 | 471 | 999.989 | 28 | 589 | 1249.986 |
OUTPUT_DIVIDE is the value of the field of SECCTL[22:19]. This will set the PLL to the maximum clock setting for the device (with OUTPUT_DIVIDE=2, by default).
The Main PLL is controlled using a PLL controller and a chip-level MMR. The DDR3 PLL is controlled by chip level MMRs. For details on how to set up the PLL see Section 6.5. For details on the operation of the PLL controller module, see the Phase-Locked Loop (PLL) for KeyStone Devices User's Guide.