TI中文支持网Part Number:ADC12DJ3200
校准是为了满足建立保持时间，那可以选择直接用sysref可以吗？
还有就是，可以正常编程完ADC之后我再发sysref吗？
Kailyn Chen：
您好， 在8.3部分的初始化步骤完整之后，即第14步之后就可以使能SYSREF校准了。
如果您是使用多个ADC12DJ3200，需要保持同步或者确定性延迟的话，需要enable SYSREF校准， 如果只有一片ADC使用，那么使能JESD接口（JESD_EN=1），自动校准就可以了。
8.3 Initialization Set UpThe device and JESD204 interface require a specific startup and alignment sequence. The general order of that sequence is listed in the following steps.
1. Power-up or reset the device.2. Apply a stable device CLK signal at the desired frequency.3. Program JESD_EN = 0 to stop the JESD204B state machine and allow setting changes.4. Program CAL_EN = 0 to stop the calibration state machine and allow setting changes.5. Program the desired JMODE.6. Program the desired KM1 value. KM1 = K-1.7. Program SYNC_SEL as needed. Choose SYNCSE or timestamp differential inputs.8. Configure device calibration settings as desired. Select foreground or background calibration modes and offset calibration as needed.9. Program CAL_EN = 1 to enable the calibration state machine.10. Enable overrange via OVR_EN and adjust settings if desired.11. Program JESD_EN = 1 to re-start the JESD204B state machine and allow the link to restart.12. The JESD204B interface operates in response to the applied SYNC signal from the receiver.13. Program CAL_SOFT_TRIG = 0.14. Program CAL_SOFT_TRIG = 1 to initiate a calibration.
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user6459816：
谢谢
