SERDES Register Map
513
SBAU337 – May 2020
Copyright © 2020, Texas Instruments Incorporated
Serial Interface Register Maps
2.6.148 Register 49FCh (offset = 49FCh) [reset = B4h]
Figure 2-862. Register 49FCh
7
6
5
4
3
2
1
0
PU_RX_PLL
RX_CHARGE_PUMP_CUR
RX_VCO_CURRENT
R/W-1h
R/W-3h
R/W-2h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 2-868. Register 49FC Field Descriptions
Bit
Field
Type
Reset
Description
7-7
PU_RX_PLL
R/W
1h
Power up RX PLL.
0h: Power down
1h: Power up
6-4
RX_CHARGE_PU
MP_CUR
R/W
3h
Set the charge pump current.
3-1
RX_VCO_CURRE
NT
R/W
2h
Sets VCO current.
100b: 24Gbps < NRZ rate < 32Gbps
101b: 21Gbps < NRZ rate < 23Gbps
110b: 20Gbps < NRZ rate < 22Gbps
111b: 19Gbps < NRZ rate < 21Gbps
2.6.149 Register 49FDh (offset = 49FDh) [reset = A5h]
Figure 2-863. Register 49FDh
7
6
5
4
3
2
1
0
RX_PLL_N
R/W-A5h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 2-869. Register 49FD Field Descriptions
Bit
Field
Type
Reset
Description
7-0
RX_PLL_N
R/W
A5h
RX PLL clock multiplier where the PLL frequency = PLL
reference clock * 2 * PLL_N. The SerDes user rate = 2 * PLL
frequency.
2.6.150 Register 49FEh (offset = 49FEh) [reset = 20h]
Figure 2-864. Register 49FEh
7
6
5
4
3
2
1
0
REFCLK_DIV4
_EN
PU_RX_AGC_
MASTER
R/W-0h
R/W-1h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 2-870. Register 49FE Field Descriptions
Bit
Field
Type
Reset
Description
6-6
REFCLK_DIV4_EN
R/W
0h
Mux control to select the LVDS reference clock directly to the
PLLs or to a /4 version
0h: PLL reference = refclk / 1
1h: PLL reference = refclk / 4
5-5
PU_RX_AGC_MAS
TER
R/W
1h
Power up RX AGC master
0h: Power down
1h: Power up