Interface to the external pll, Interface to the external pll -48 – Altera CPRI v6.0 MegaCore Function User Manual
Page 78
Signal Name
Direction
Description
xcvr_tx_cal_busy
Output
Indicates to external reset controller that the transmitter is
still busy with the calibration process.
xcvr_rx_analogreset
Input
Analog reset to receiver from external reset controller.
xcvr_rx_digitalreset
Input
Digital reset to receiver from external reset controller.
xcvr_rx_cal_busy
Output
Indicates to external reset controller that the receiver is still
busy with the calibration process.
xcvr_reset_tx_ready
Input
Indicates the Tx reset controller reset sequence is
completed. When this signal is asserted, the IP core begins a
reset of the IP core Tx path.
xcvr_reset_rx_ready
Input
Indicates the Rx reset controller reset sequence is
completed. When this signal is asserted, the IP core begins a
reset of the IP core Rx path.
Related Information
Adding the External Reset Controller
Information about the Altera Transceiver Reset Controller IP core for Arria V GZ and Stratix V devices.
Information about the Altera Transceiver Reset Controller IP core for Arria 10 devices.
Interface to the External PLL
Table 3-27: CPRI v6.0 IP Core External PLL Interface Signals
The CPRI v6.0 IP core requires that you generate and connect an external transceiver PLL IP core.
Signal Name
Direction
Description
xcvr_ext_pll_clk
Input
Clocks the transmitter PMA.
You should drive this input clock with the output of the
external transceiver TX PLL. In Arria 10 devices, you have a
choice of different TX PLL IP cores to configure. You must
ensure that you configure a PLL IP core that is capable of
driving the frequency that the CPRI v6.0 IP core requires to
run at the specified CPRI line bit rate.
Related Information
Information about the Arria V GZ and Stratix V transceiver PLL IP cores.
Information about the Arria 10 transceiver PLL IP cores.
3-48
Interface to the External PLL
UG-01156
2014.08.18
Altera Corporation
Functional Description