IP-CPRI Altera, IP-CPRI Datasheet - Page 113

• 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

Chapter 6: Software Interface
MAP Interface and AUX Interface Configuration Registers
Table 6–40. CPRI_MAP_TX_READY_THR—CPRI Mapping Tx Ready Threshold—Offset: 0x12C
Table 6–41. CPRI_MAP_TX_START_THR—CPRI Mapping Tx Start Threshold—Offset: 0x130
Table 6–42. CPRI_PRBS_CONFIG—PRBS Generation Pattern Configuration—Offset: 0x13C
Table 6–43. CPRI_PRBS_STATUS—PRBS Data Validation Status—Offset: 0x140–0x144
December 2010 Altera Corporation
RSRV
map_tx_ready_thr
RSRV
map_tx_start_thr
RSRV
prbs_mode
PRBS_error
PRBS_valid
Note to
(1) If this CPRI MegaCore function has more than 16 antenna-carrier interfaces (N_MAP > 16), the status for antenna-carrier interfaces 0 through
15 is in the register at offset 0x140, and the status for antenna-carrier interfaces 16 and up is in the register at offset 0x144. The maximum
number of antenna-carrier interfaces in the CPRI MegaCore function is 24.
Table
Field
Field
Field
Field
6–43:
[31:4]
[3:0]
[31:4]
[3:0]
Bits
Bits
[31:2]
[1:0]]
[(N_MAP+15):16] RC
[(N_MAP-1):0]]
Access
UR0
RW
Access
UR0
RW
Bits
Bits
Reserved.
Threshold for starting transmission from the MAP Tx buffers for all
data channels N to the CPRI transmitter interface. Data
transmission from each MAP Tx buffer starts only after that MAP
Tx buffer fills beyond this threshold value. All the MAP Tx buffers
have the same depth, 16.
Reserved.
Threshold for assertion of the mapN_tx_ready signal, for all data
channels N. The mapN_tx_ready signal is asserted only after the
Map Tx buffer for data channel N empties to a level below this
threshold value. All the MAP Tx buffers have the same depth, 16.
UR0
RW
RC
Access
Access
Reserved.
PRBS loopback and pattern mode. Values are:
The PRBS mode is common to all antenna-carrier
interfaces.
Indicates PRBS error detected on the
corresponding antenna-carrier interfaces.
Indicates a valid PRBS pattern on the
corresponding antenna-carrier receiver interfaces.
00: Normal mode (IQ samples, no loopback)
01: Counter sequence (internal loopback path)
10: PRBS 2
11: Reserved
Function
Function
23
-1 inverted (internal loopback path)
Function
Function
(Note 1)
CPRI MegaCore Function User Guide
Default
28’h0
4’h8
Default
28’h0
4’h7
Default
30'h0
2'h0
Default
16'h0
16'h0
6–17