JAJSS15 November 2023 LMK3H0102
ADVANCE INFORMATION
At start-up, the REF_CTRL pin selects I2C mode when low, and OTP mode when high. After start-up, REF_CTRL can be programmed to output an LVCMOS REF_CLK, which is derived from either FOD0 or FOD1 followed by an integer divider (/2, /4, /8). Alternatively, this pin can be disabled, or function as a "clock ready" signal. Table 7-9 shows these options.
R7[14:13] | REF_CTRL Function |
---|---|
0x0 | Disabled, forced low |
0x1 | Disabled, tri-state |
0x2 | REF_CLK LVCMOS output |
0x3 (default) | CLK_READY output |