SPRS292A − OCTOBER 2005 − REVISED NOVEMBER 2005
PLL and PLL controller (continued)
PLLCSR Register (0x01B7 C100)
31 | 28 | 27 | 24 | 23 |
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| 20 | 19 |
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| 16 |
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| Reserved |
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| R−0 |
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15 | 12 |
| 8 |
| 6 | 5 | 4 |
| 2 | 1 | 0 | |
11 | 7 | 3 | ||||||||||
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| Reserved |
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| STABLE |
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| Reserved | PLLRST | Reserved | PLLPWRDN | PLLEN | |
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| R−0 |
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| R−x |
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| R−0 | RW−1 | R/W−0 | R/W−0b | RW−0 |
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Legend: R = Read only, R/W = Read/Write;
Table 29. PLL Control/Status Register (PLLCSR)
BIT # | NAME |
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| DESCRIPTION |
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31:7 | Reserved | Reserved. | ||
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| Oscillator Input Stable. This bit indicates if the OSCIN/CLKIN input has stabilized. | ||
6 | STABLE | 0 | – OSCIN/CLKIN input not yet stable. Oscillator counter is not finished counting (default). | |
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| 1 | – | OSCIN/CLKIN input stable. |
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5:4 | Reserved | Reserved. | ||
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| Asserts RESET to PLL | ||
3 | PLLRST | 0 | – | PLL Reset Released. |
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| 1 | – PLL Reset Asserted (default). | |
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2 | Reserved | Reserved. The user must write a “0” to this bit. | ||
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| Select PLL Power Down | ||
1 | PLLPWRDN | 0 | – | PLL Operational (default). |
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| 1 | – PLL Placed in | |
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| PLL Mode Enable | ||
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| 0 | – Bypass Mode (default). PLL disabled. | |
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| Divider D0 and PLL are bypassed. SYSCLK1/SYSCLK2/SYSCLK3 are divided down |
0 | PLLEN |
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| directly from input reference clock. |
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| 1 | – | PLL Enabled. |
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| Divider D0 and PLL are not bypassed. SYSCLK1/SYSCLK2/SYSCLK3 are divided down |
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| from PLL output. |
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POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 | 49 |