Altera CPRI v6.0 MegaCore Function - Manual (Page 95)

Bits Field Name Type Value on
Reset
Description
4:0
bit_rate
#nik14
11442
18015
3/fn_
RO_
or_
RW
#nik141
1442180
153/fn_
param_
ed_det
CPRI line bit rate to be used in next attempt to achieve frame
synchronization, encoded according to the following valid
values:
• 5'b00001: 0.6144 Gbps
• 5'b00010: 1.2288 Gbps
• 5'b00100: 2.4576 Gbps
• 5'b00101: 3.0720 Gbps
• 5'b01000: 4.9150 Gbps
• 5'b01010: 6.1440 Gbps
• 5'b10000: 9.8304 Gbps
• 5'b10100: 10.1376 Gbps
If the input signal
nego_bitrate_in
has a non-zero value, the
CPRI v6.0 IP core uses the encoded value driven on
nego_
bitrate_in
in the next attempt to achieve frame synchroniza‐
tion, and ignores the value in the
bit_rate
register field.
The value driven on the
nego_bitrate_in
signal, if it is non-
zero, always overrides the value in this register field.
Related Information
Auto-Rate Negotiation on page 3-40
PROT_VER Register
Table 5-7: CPRI v6.0 IP Core PROT_VER Register at Offset 0x10
Bits Field Name Type Value on
Reset
Description
31:25 Reserved UR0 7'b0
24
rx_prot_
ver_valid
RO 1'b0 Value received in incoming Z.2.0 control byte is a valid CPRI
v6.0 protocol version encoding.
23:16
rx_prot_
ver
RO 8'b0 Encoded protocol version received in incoming Z.2.0 control
byte.
15:10 Reserved UR0 6'b0
(4) If you turn on Enable auto-rate negotiation, this register field is a RW register field. If you turn off Enable
auto-rate negotiation, this register field is a RO register field.
(5) Reset value is the value you specify for Bit rate in the CPRI v6.0 parameter editor.
5-6 PROT_VER Register
UG-01156
2015.02.16
Altera Corporation CPRI v6.0 IP Core Registers
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