Altera CPRI v6.0 MegaCore Function - Manual (Page 41)

AUX RX Interface Data Signals
Signal Name Direction Description
aux_rx_ctrl[3:0]
Output Control slots indicator. Each asserted bit indicates that the
corresponding byte position in
aux_rx_data
holds a byte
from a CPRI control word.
AUX TX Interface Control and Status Signals
Signal Name Direction Description
aux_tx_sync_rfp
Input Synchronization input used in REC master to control the
start of a new 10 ms radio frame. Asserting this signal
resets the frame synchronization machine. The CPRI v6.0
IP core uses the rising edge of the pulse for synchroniza‐
tion.
aux_tx_err[3:0]
Output Indicates that in the previous
cpri_clkout
cycle,
aux_tx_
mask
bits masked one or more control words in the target
CPRI frame.
aux_tx_rfp
Output Synchronization pulse for start of 10 ms radio frame. The
pulse occurs at the start of the radio frame on the AUX TX
interface.
aux_tx_hfp
Output Synchronization pulse for start of hyperframe. The pulse
occurs at the start of the hyperframe on the AUX TX
interface.
aux_tx_bfn[11:0]
Output Current radio frame number on the AUX TX interface.
aux_tx_z[7:0]
Output Current hyperframe number on the AUX TX interface.
Value is in the range 0–149.
aux_tx_x[7:0]
Output Index number of the current basic frame in the current
hyperframe on the AUX TX interface. Value is in the
range 0–255.
aux_tx_seq[6:0]
Output Index number of the current 32-bit word in the current
basic frame on the AUX TX interface.
The value range depends on the current CPRI line bit rate:
• 0.6144 Gbps: range is 0–3
• 1.2288 Gbps: range is 0–7
• 2.4576 Gbps: range is 0–15
• 3.0720 Gbps: range is 0–19
• 4.9152 Gbps: range is 0–31
• 6.1440 Gbps: range is 0–39
• 9.8304 Gbps: range is 0–63
• 10.1376 Gbps: range is 0–79
UG-01156
2014.08.18
AUX Interface Signals 3-11
Functional Description Altera Corporation
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