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SRIO Registers
5.15SERDES Macro Configuration Register n (SERDES_CFGn_CNTL)
There are four of these registers, to support four ports.
Figure 71. SERDES Macros CFG (0-3) Registers (SERDES_CFGn_CNTL)
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| 16 |
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| Reserved |
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15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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| LB |
| Reserved |
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| MPY |
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| ENPLL | ||
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LEGEND: R = Read, W = Write, n = value at reset
Table 45. SERDES Macros CFG
Bit | Field | Value | Description |
31:10 | Reserved |
| Reserved. |
9:8 | LB |
| Loop bandwidth. Specify loop bandwidth settings. |
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| 00 | Frequency dependent bandwidth. The PLL bandwidth is set to a twelfth of the frequency of |
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| RIOCLK/RIOCLK. |
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| 01 | Reserved |
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| 10 | Low bandwidth. The PLL bandwidth is set to a twentieth of the frequency of RIOCLK/RIOCLK, or |
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| 3MHz (whichever is larger). |
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| 11 | High bandwidth. The PLL bandwidth is set to a eighth of the frequency of RIOCLK/RIOCLK. |
7:6 | Reserved |
| Reserved. |
5:1 | MPY |
| PLL multiply. Select PLL multiply factors between 4 and 60. |
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| 0000 | 4x |
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| 0001 | 5x |
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| 0010 | 6x |
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| 0011 | Reserved |
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| 0100 | 8x |
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| 0101 | 10x |
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| 0110 | 12x |
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| 0111 | 12.5x |
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| 1000 | 15x |
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| 1001 | 20x |
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| 1010 | 25x |
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| 1011 | Reserved |
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| 1100 | Reserved |
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| 1101 | 50x |
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| 1110 | 60x |
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| 1111 | Reserved |
0 | ENPLL |
| Enable PLL. Enables the PLL. |
116 | Serial RapidIO (SRIO) | SPRU976 |
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