IP-CPRI Altera, IP-CPRI Datasheet - Page 106

• 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

6–10
Table 6–21. AUTO_RATE_CONFIG—Auto-Rate Negotiation Register—Offset: 0x48
Table 6–22. CPRI_INTR_PEND—Interrupt Pending Status—Offset: 0x4C (Part 1 of 2)
CPRI MegaCore Function User Guide
RSRV
i_datarate_en
i_datarate_set
Note to
(1) This value is not valid for CPRI MegaCore variations that target a Cyclone IV GX device. This value is valid for CPRI MegaCore variations that
RSRV
los_lcv_pending
RSRV
target an Arria II GX device only if that device is an I3 speed grade device.
Table
Field
Field
6–21:
[31:5]
[4]
[3:0]
[31:6]
[5]
[4:2]
Bits
Bits
Access
UR0
RO
RW
UR0
RW
UR0
Access
Reserved.
Indicates that auto-rate negotiation is enabled. (Value is
1’b0 if auto-rate negotiation is not enabled; 1’b1 if
auto-rate negotiation is enabled, in the CPRI parameter
editor). Refer to
illustration of the auto-rate negotiation logic in the CPRI
MegaCore function.
CPRI line rate to be used in next attempt to achieve
frame synchronization. You set the line rate in your
implementation of the auto-rate negotiation hardware
and software outside the CPRI MegaCore function.
Refer to
Auto-Rate
use the auto-rate negotiation logic implemented in the
CPRI MegaCore function.
Encode the CPRI line rate in this field using the
following values:
0001: 6.144 Mbps
0010: 1228.8 Mbps
0100: 2457.6 Mbps
0101: 3072.0 Mbps
1000: 4915.0 Mbps
1010: 6144.0 Mbps
Reserved.
Indicates an los_lcv interrupt is pending (the interrupt
occurred but is not yet serviced).
Reserved.
Appendix B, Implementing CPRI Link
Negotiation, for information about how to
Figure B–1
Function
(1)
(1)
and
Function
Figure B–2
for an
December 2010 Altera Corporation
Chapter 6: Software Interface
CPRI Interface Registers
28’h0
As specified in
CPRI parameter
editor
4’h0
Default
Default
26’h0
1’h0
4’h0