eCPRI Intel® FPGA IP User Guide

ID 683685
Date 2/22/2024
Public

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5.14.2. IWF Sink Interface

Table 46.  Signals of the IWF Sink InterfaceAll signals are synchronous to clk_rx.
Signal Name Width (Bits) I/O Direction Description
iwf_avst_sink_valid 1 Input Avalon® sink valid from eCPRI IP to client logic.
iwf_avst_sink_data DATA_WIDTH 11 Input Avalon® sink write data from eCPRI IP to client logic.
iwf_avst_sink_sop 1 Input Avalon® sink start of packet from eCPRI IP to client logic. Indicate the beginning of packet.
iwf_avst_sink_eop 1 Input Avalon® sink end of packet from eCPRI IP to client logic. Indicates the end of packet.
iwf_avst_sink_empty LOG2(DATA_WIDTH11/8) Input Avalon® sink empty from eCPRI IP to client logic. . Indicates the number of symbols that are empty, that is, do not represent valid data.
iwf_avst_sink_ready 1 Output Avalon® sink ready driven from eCPRI. Indicates eCPRI can accept data.
iwf_avst_sink_error 1 Input Avalon® sink error from eCPRI IP to client logic. A bit mask to mark errors affecting the data being transferred in the current cycle.
Sideband
iwf_sink_pc_id 16 Input Physical channel ID of the eCPRI message. Lower byte maps to CPRI channel.

Valid on SOP assertion and stable until EOP assertion.

iwf_sink_seq_id 16 Input Sequence ID of the eCPRI message.

Valid on SOP assertion and stable until EOP assertion.

iwf_sink_rtc_id 16 Input Real Time Control ID of the eCPRI message.
Valid values are:
  • ID [7:0]: CPRI channel
  • ID [11:8]: 'h0- Ctrl_AxC, 'h1- Vendor Specific, 'h2- Real-time Vendor Specific

Valid on SOP assertion and stable until EOP assertion.

iwf_sink_msg_type 8 Input Indicate message type of the eCPRI message. IWF type 0 supports only message type 0 to 7 and 64-255 for eCPRI v1.2 specifications.

Valid on SOP assertion and stable until EOP assertion.

iwf_sink_reset_id 16 Input Indicate reset ID of the eCPRI message type 6. Lower byte maps to CPRI channel.

Valid on SOP assertion and stable until EOP assertion.

iwf_sink_reset_op 8 Input Indicate reset operation type of the eCPRI message type 6:
  • 8’b00000000- Remote Reset Request
  • 8’b00000001- Remote Reset Response
  • Others- Reserved

Valid on SOP assertion and stable until EOP assertion.

iwf_sink_event_type 8 Input Indicates event type of the eCPRI message type 7.

Valid on SOP assertion and stable until EOP assertion.

iwf_sink_event_id 8 Input Indicates event ID of the eCPRI message type 7. Lower byte maps to CPRI channel.

Valid on SOP assertion and stable until EOP assertion.

11 This is set to 64. This parameter is hidden from user and you can't change it.