IP-CPRI Altera, IP-CPRI Datasheet - Page 96
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IP-CPRI
Manufacturer Part Number
IP-CPRI
Description
IP CORE - Common Public Radio Interface (CPRI)
Manufacturer
Altera
Specifications of IP-CPRI
Software Application
IP CORE, Interface And Protocols, HIGH SPEED
Supported Families
Arria II GX, Cyclone IV GX, HardCopy IV, Stratix IV
Core Architecture
FPGA
Core Sub-architecture
Arria, Cyclone, Stratix
Rohs Compliant
NA
Lead Free Status / RoHS Status
na
Lead Free Status / RoHS Status
na
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5–10
Table 5–11. CPRI MAP Transmitter Interface Signals (Part 2 of 2)
Auxiliary Interface Signals
CPRI MegaCore Function User Guide
map{23…0}_tx_status_data
Signal
Table 5–12
All the signals in
visible on the cpri_clkout port.
Direction
Output
through
Table 5–12
Table 5–13
This vector contains the following status bits:
[2]
[1]
[0]
cpri_map_tx_overflow: Tx FIFO overflow indicator for this
antenna-carrier interface. This signal is synchronous to the
cpri_clkout clock, and is asserted following a write to a full
buffer. This signal reflects the value in the appropriate bit of the
buffer_tx_overflow field of the CPRI_IQ_TX_BUF_STATUS
register
cpri_map_tx_underflow: Tx FIFO underflow indicator for this
antenna-carrier interface. This signal is synchronous to the
cpri_clkout clock, and is asserted following a read from an empty
buffer. This signal reflects the value in the appropriate bit of the
buffer_tx_underflow field of the CPRI_IQ_TX_BUF_STATUS
register
cpri_map_tx_en: Indicates that this antenna-carrier interface is
enabled. The value is determined in the CPRI_IQ_TX_BUF_CONTROL
register. Use this signal to disable external logic for inactive AxC
interfaces and to map interface clock gating to save power.
through
list the signals on the CPRI IP core auxiliary interfaces.
(Table 6–47 on page
(Table 6–47 on page
Table 5–13
Description
are clocked by the internal clock
6–18).
6–18).
May 2011 Altera Corporation
Auxiliary Interface Signals
Chapter 5: Signals
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