SERDES Register Map
509
SBAU337 – May 2020
Copyright © 2020, Texas Instruments Incorporated
Serial Interface Register Maps
Table 2-855. Register 49EB Field Descriptions
Bit
Field
Type
Reset
Description
7-0
TX_PLL_N
R/W
14h
TX PLL clock multiplier where the PLL frequency = PLL
reference clock * 2 * PLL_N. The SerDes user rate = 2 * PLL
frequency.
2.6.136 Register 49ECh (offset = 49ECh) [reset = 40h]
Figure 2-850. Register 49ECh
7
6
5
4
3
2
1
0
TX_REFCLK_S
EL
R/W-1h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 2-856. Register 49EC Field Descriptions
Bit
Field
Type
Reset
Description
6-6
TX_REFCLK_SEL
R/W
1h
Mux control to select either the reference clock or a recovered
clock for the TX PLL. See register PzF0 for recovered clock
options.
0h: Recovered clock
1h: Reference clock
2.6.137 Register 49EDh (offset = 49EDh) [reset = 9Ch]
Figure 2-851. Register 49EDh
7
6
5
4
3
2
1
0
TX_PLL_BIAS4
PU_TX_BAND
GAP
PU_RVDD_TX
EN_RVDDVCO
_TX
R/W-4h
R/W-1h
R/W-1h
R/W-1h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 2-857. Register 49ED Field Descriptions
Bit
Field
Type
Reset
Description
7-5
TX_PLL_BIAS4
R/W
4h
Controls the TX PLL bias setting 4.
4-4
PU_TX_BANDGAP
R/W
1h
Power up TX PLL bandgap.
0h: Power down
1h: Power up
3-3
PU_RVDD_TX
R/W
1h
2-2
EN_RVDDVCO_TX
R/W
1h
2.6.138 Register 49EEh (offset = 49EEh) [reset = 0h]
Figure 2-852. Register 49EEh
7
6
5
4
3
2
1
0
TEST_MUX_S
EL_B[0]
R/W-0h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset