User guide

The calibration bits for CDR/CMU, TX termination and Vod, and RX Offset Cancellation can be set one
time through the internal configuration bus because they are located at the same PMA offset address. The
PreSICE executes the calibration in the following order:
1. CDR/CMU
2. RX Offset Cancellation
3. TX termination and Vod
Check Calibration Status
Checking calibration status requires access to the internal configuration bus through the transceiver
dynamic reconfiguration interface. Follow the steps below to check the calibration status.
1. Request access to internal configuration bus by writing 0x2 to offset address 0x0[1:0].
2. Wait for reconfig_waitrequest to deassert (logic low).
3. Read fPLL offset address 0x101 bit[1] to check the calibration status.
• 0x0 = Pass
• 0x1 = Fail
4. Read ATX PLL offset address 0x101 bit[0] to check the calibration status.
• 0x0 = Fail
• 0x1 = Pass
5. Read PMA offset address 0x101 bit[1], bit[2], bit[5] to check the calibration status.
• 0x0 = Fail
• 0x1 = Pass
7-12
Check Calibration Status
UG-01143
2015.05.11
Altera Corporation
Calibration
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