The transcode IP block’s port definitions are shown in the following
table. The width of the data buses varies depending on whether the block is
configured in 50GE mode or 100GE mode. The stat_rx_err_count_inc input is driven by the GTM_DUAL’s FEC hard block
and allows the counting of the symbol errors in order to detect and implement the
hi-SER state and associated logic.
| Port Name | Width (50G) | Width (100G) | I/O | Description |
|---|---|---|---|---|
| tx_din | 132 | 320 | Input | Transmit path data input This signal is handled internal to the GTM Wizard IP and it interfaces the GTM_DUAL UNISIM. |
| tx_din_start | 1 | 1 | Input | Start of codeword on tx_din This signal is handled internal to the GTM Wizard IP and it interfaces the GTM_DUAL UNISIM. |
| tx_dout | 160 | 320 | Output | Transmit path data output This signal is handled internal to the GTM Wizard IP and it interfaces the GTM_DUAL UNISIM. |
| rx_din | 160 | 320 | Input | Receive path data input This signal is handled internal to the GTM Wizard IP and it interfaces the GTM_DUAL UNISIM. |
| rx_din_start | 1 | 1 | Input | Start of codeword on rx_din This signal is handled internal to the GTM Wizard IP and it interfaces the GTM_DUAL UNISIM. |
| rx_din_is_am | 1 | 1 | Input | Indicates alignment markers present on rx_din. |
| rx_din_flags | 4 | 4 | Input |
Indicates status of data on rx_din This signal is handled internal to the GTM Wizard IP and it interfaces the GTM_DUAL UNISIM.
|
| rx_dout | 132 | 320 | Output | Receive path data output This signal is handled internal to the GTM Wizard IP and it interfaces the GTM_DUAL UNISIM. |
| stat_rx_err_count_inc | 4 | 4 | Input | Symbol error count from RS decoder This signal is handled internal to the GTM Wizard IP and it interfaces the GTM_DUAL UNISIM. |
| ctl_rx_bypass_correction | 1 | 1 | Input | Correction bypass configuration This is exposed as the top-level port as "gtm_transcode_ctl_rx_bypass_correction" |
| ctl_rx_bypass_indication | 1 | 1 | Input | Indication bypass configuration This is exposed as the top-level port as "gtm_transcode_ctl_rx_bypass_indication" |
| stat_rx_hi_ser | 1 | 1 | Output | Hi-SER status This signal is handled internal to the GTM Wizard IP and it interfaces the GTM_DUAL UNISIM. |
| stat_rx_tcd_lock | 1 | 1 | Output | TX block lock status (100G mode only) This is exposed as the top-level port as "gtm_transcode_stat_rx_tcd_lock" |
| stat_tx_pcs_am_lock | 1 | 1 | Output | TX AM lock status This is exposed as the top-level port as "gtm_transcode_stat_tx_pcs_am_lock" |
| gtm_transcode_bypass_rx_core | 1 | 1 | Input reserved port, tie-off to 0 | Future enhancement for GTM Switchable Ethernet configurations |
| gtm_transcode_bypass_tx_core | 1 | 1 | Input reserved port, tie-off to 0 | Future enhancement for GTM Switchable Ethernet configurations |
For more information, see AR 72110.