
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 | 
