JAJSDO4C February 2017 – April 2020 DAC38RF82 , DAC38RF89
PRODUCTION DATA.
15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 |
0 | 0 | 0 | 0 | 0 | 0 | 0 | x |
R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W |
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
0 | 0 | 1 | 1 | 1 | 0 | 1 | 1 |
R/W | R/W | R/1W | R/W | R/W | R/W | R/W | R/W |
LEGEND: R/W = Read/Write; R = Read only; -n = value after rese1t |
Bit | Field | Type | Reset | Description |
---|---|---|---|---|
15 | SERDES_CLK_SEL | R/W | 0 | Select either the PLL output of the DACCLK from the pad.
0 = DACCLK pad 1 = PLL output |
14:11 | SERDES_REFCLK_DIV | R/W | 0x0 | The divide amount for the serdes REFCLK minus 1 |
10:2 | Reserved | R/W | 0x000 | Reserved |
1:0 | SERDES_REFCLK_PREDIV | R/W | 10 | These bits select the pre-divide on the DACCLK input clock before the DACCLK is used in the dividers used in the SERDES PLL REFCLK and the Fusefarm SYSCLK.
00 = if DACCLK input ≤ 2 GHz; prediv is set to div1 01 = if DACCLK input is ≤ 4 GHz and > 2 GHz, prediv is set to div2 10 = if DACCLK input is ≤ 9 GHz and > 4 GHz, prediv is set to div4 11 = Not valid |