Tx_ctrl register, Tx_ctrl register -12 – Altera CPRI v6.0 MegaCore Function User Manual
Page 101
Table 5-15: CPRI v6.0 IP Core CTRL_INDEX Register at Offset 0x30
Frequency differences between the control and status interface clock
cpu_clk
and the main CPRI v6.0 IP core
clock
cpri_clkout
might cause non-zero read latency and more than one clock cycle of write latency when
accessing this register.
Bits
Field Name
Type
Value on
Reset
Description
31:27
Reserved
UR0
5'b0
26:24
rx_ctrl_
seq
RW
3'b0
Sequence number for CPRI control word 32-bit section
monitoring. The value in this field determines the 32-bit
section of the control receive table entry that appears in the
RX_
CTRL
register. The value indicates whether this is the first,
second, third, fourth, or fifth (for RTVS) 32-bit section in the
control word.
23:16
rx_ctrl_x
RW
8'b0
Index for CPRI control word monitoring (X value in frame
location #Z.X.Y). The value in this field determines the control
receive table entry of which a 32-bit section appears in the
RX_
CTRL
register.
15:12
Reserved
UR0
4'b0
11
tx_ctrl_
insert
RW
1'b0
Control word 32-bit section transmit enable. This value is
stored in the control transmit table with its associated entry.
When you change the value of the
tx_ctrl_seq
field or the
tx_
ctrl_x
field, the stored
tx_ctrl_insert
bit associated with
the indexed entry appears in the
tx_ctrl_insert
field.
At the time the CPRI v6.0 IP core can insert a control transmit
table entry in the associated position in the outgoing
hyperframe on the CPRI link, if the
tx_ctrl_insert
bit
associated with that entry has the value of 1, and the
tx_ctrl_
insert_en
bit of the
L1_CONFIG
register is asserted, the IP core
inserts the table entry in the hyperframe.
10:8
RW
3'b0
Sequence number for CPRI control word 32-bit section
insertion. The value in this field determines the 32-bit section
of the control transmit table entry that appears in the
TX_CTRL
register. The value indicates whether this is the first, second,
third, fourth, or fifth (for RTVS) 32-bit section in the control
word.
7:0
RW
8'b0
Index for CPRI control word insertion (X value in frame
location #Z.X.Y). The value in this field determines the control
transmit table entry of which a 32-bit section appears in the
TX_
CTRL
register.
TX_CTRL Register
5-12
TX_CTRL Register
UG-01156
2015.02.16
Altera Corporation
CPRI v6.0 IP Core Registers