Altera CPRI IP Core - Manual (Page 133)

Chapter 7: Software Interface 7–17
MAP Interface and AUX Interface Configuration Registers
December 2013 Altera Corporation CPRI MegaCore Function
User Guide
map_n_ac [4:0] RW Oversampling factor on each active data channel. 5’h0
Note to Table 7–32 :
(1) This register applies only to map_mode 00, in which each antenna-carrier interface has the same sample rate.
Table 7–32. CPRI_MAP_CNT_CONFIG—Basic UMTS/LTE Mapping Configuration—Offset: 0x104 (1) (Part 2 of 2)
Field Bits Access Function Default
Table 7–33. CPRI_MAP_TBL_CONFIG—K Parameter Config for Advanced Table-Based Mapping—Offset: 0x0108 (1)
Field Bits Access Function Default
RSRV [31:WIDTH_K] UR0 Reserved. 0
K [WIDTH_K-1:0] RW Number of basic frames in AxC container block. 0
Note to Table 7–33 :
(1) This register applies only to map_mode 01, 10, or 11, the advanced mapping modes.
Table 7–34. CPRI_MAP_TBL_INDEX—Advanced Mapping Configuration Table Index—Offset: 0x10C (1)
Field Bits Access Function Default
RSRV [31:11] UR0 Reserved. 21’h0
map_conf_index [10:0] RW
Index for configuring antenna-carrier interface information
in the advanced mapping Rx and Tx tables. The value in this
field determines the table entries that appear in the
CPRI_MAP_TBL_RX and CPRI_MAP_TBL_TX registers.
11’h0
Note to Table 7–34 :
(1) This register applies only to map_mode 01, 10, or 11, the advanced mapping modes.
Table 7–35. CPRI_MAP_TBL_RX—Advanced Mapping Rx Configuration Table—Offset: 0x110 (1) (Part 1 of 2)
Field Bits Access Function Default
RSRV [31:29] UR0 Reserved. 3’h0
width [28:24] RW
Width of IQ sample in timeslot. Specified as 1/2 the
number of bits in the IQ sample.
This field is used in 15-bit mode with advanced mapping
mode 01 and in 16-bit mode with all advanced mapping
modes. In 15-bit mode with advanced mapping modes 10
and 11, you must set this field to the value of 15 to indicate
the full 30 bits of the 32-bit timeslot.
5'h0
RSRV 23:21] UR0 Reserved. 3’h0
position [20:16] RW
Starting bit position of IQ sample in timeslot. Specified as
1/2 the bit position number.
This field is used in 15-bit mode with advanced mapping
mode 01 and in 16-bit mode with all advanced mapping
modes. In 15-bit mode with advanced mapping modes 10
and 11, you must set this field to the offset of the next
available bit for your 30-bit sample in the current 32-bit
timeslot.
5'h0
RSRV [15:WIDTH_N_MAP+8] UR0 Reserved. 0
ac [WIDTH_N_MAP +7:8] RW AxC interface number. 0
RSRV [7:1] UR0 Reserved. 7'h0