eCPRI Intel® FPGA IP User Guide

ID 683685
Date 11/15/2022
Public

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5.11. eCPRI IP Source Interface

Table 39.  Signals of the eCPRI IP Source InterfaceThis table lists the ports from eCPRI IP to client logic. All signals are synchronous to clk_rx.
Signal Name Width (Bits) I/O Direction Description
avst_source_valid 1 Output Avalon® source valid from eCPRI to client logic.
avst_source_data DATA_WIDTH 8 Output Avalon® source write data from eCPRI to RRH PHY.
avst_source_sop 1 Output Avalon® source start of packet (SOP) from eCPRI to RRH PHY. Indicate the beginning of packet.
avst_source_eop 1 Output Avalon® source end of packet (EOP) from eCPRI to RRH PHY. Indicates the end of packet.
avst_source_empty LOG2(DATA_WIDTH8/8) Output Avalon® source empty from eCPRI to RRH PHY. Indicates the number of symbols that are empty, that is, do not represent valid data.
avst_source_error 1 Output Avalon® source error from eCPRI to RRH PHY. A bit mask to mark errors affecting the data being transferred in the current cycle.
Sideband
source_pc_id 32 Output Indicates physical channel ID of eCPRI message.

For message type 3, the physical channel id is 32-bit wide. For other message types, it is 16-bit wide and the 16 bit MSB is ignored. Valid on SOP assertion and stable until EOP assertion.

source_seq_id 32 Output Indicates sequence ID of eCPRI message.

For message type 3, the sequence id is 32- bit wide. For other message types, it is 16-bit wide and the 16 bit MSB is ignored. Valid on SOP assertion and stable until EOP assertion.

source_rtc_id 16 Output

Real time control ID of eCPRI message.

Valid on SOP assertion and stable until EOP assertion.

source_msg_type 8 Output

Indicates message type of the eCPRI message. Valid range is 0-7 and 64-255 for eCPRI v1.2 specification.

Valid on SOP assertion and stable until EOP assertion.
source_mem_acc_id 8 Output

Indicates remote memory access id of the eCPRI message type 4.

Valid on SOP assertion and stable until EOP assertion.
source_op_type 8 Output Indicates the operation of the eCPRI message type 4:
  • 8’b0000 0000 – Read Request

  • 8’b0000 0001 – Read Response

  • 8’b0001 0000 – Write Request

  • 8’b0001 0001 – Write Response

  • 8’b0010 xxxx – Write No Response

  • 8’bxxxx 0010 – Failure No Response

Valid on SOP assertion and stable until EOP assertion.
source_element_id 16 Output

Indicates element ID of the eCPRI message type 4.

Valid on SOP assertion and stable until EOP assertion.

source_address 48 Output

Indicates memory address of the eCPRI message type 4.

Valid on SOP assertion and stable until EOP assertion.

source_length 16 Output

Indicates memory access length of the eCPRI message type 4.

Valid on SOP assertion and stable until EOP assertion.

source_reset_id 16 Output

Indicates reset ID of the eCPRI message type 6.

Valid on SOP assertion and stable until EOP assertion.

source_reset_op 8 Output
Indicate reset operation type of the eCPRI message type 6:
  • 8’b0000 0000 – Remote Reset Request

  • 8’b0000 0001 – Remote Reset Response

    Others – Reserved

Valid on SOP assertion and stable until EOP assertion.
source_event_id 8 Output

Indicates event ID of the eCPRI message type 7.

Valid on SOP assertion and stable until EOP assertion.

source_event_type 8 Output

Indicates event type of the eCPRI message type 7.

Valid on SOP assertion and stable until EOP assertion.

source_notif 8 Output

Indicates number of faults for within eCPRI message type 7.

Valid on SOP assertion and stable until EOP assertion.

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

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