Texas Instruments AFE79 Series - 2.6.133 Register 49 E9 h (offset = 49 E9 h) [reset = 60 h]; 2.6.134 Register 49 EAh (offset = 49 EAh) [reset = B4 h]; 2.6.135 Register 49 EBh (offset = 49 EBh) [reset = 14 h]

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SBAU337–May 2020
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Serial Interface Register Maps
Table 2-852. Register 49E8 Field Descriptions
Bit Field Type Reset Description
6-4 VRVDD_TX R/W 4h
2.6.133 Register 49E9h (offset = 49E9h) [reset = 60h]
Figure 2-847. Register 49E9h
7 6 5 4 3 2 1 0
TX_PLL_VCO_RANGE_LSB
R/W-3h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 2-853. Register 49E9 Field Descriptions
Bit Field Type Reset Description
7-5
TX_PLL_VCO_RA
NGE_LSB
R/W 3h
PLL VCO range settings:
0h: 27Gbps < NRZ rate < 32Gbps
1h: 25Gbps < NRZ rate < 30Gbps
2h: 24Gbps < NRZ rate < 28Gbps
3h: 23Gbps < NRZ rate < 26Gbps
4h: 22Gbps < NRZ rate < 24Gbps
5h: 21Gbps < NRZ rate < 23Gbps
6h: 20Gbps < NRZ rate < 22Gbps
7h: 19Gbps < NRZ rate < 21Gbps
2.6.134 Register 49EAh (offset = 49EAh) [reset = B4h]
Figure 2-848. Register 49EAh
7 6 5 4 3 2 1 0
PU_TX_PLL TX_CHARGE_PUMP_CUR TX_VCO_CURRENT
R/W-1h R/W-3h R/W-2h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset
Table 2-854. Register 49EA Field Descriptions
Bit Field Type Reset Description
7-7 PU_TX_PLL R/W 1h
Power up TX PLL.
0h: Power down
1h: Power up
6-4
TX_CHARGE_PU
MP_CUR
R/W 3h Set the charge pump current.
3-1
TX_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
2.6.135 Register 49EBh (offset = 49EBh) [reset = 14h]
Figure 2-849. Register 49EBh
7 6 5 4 3 2 1 0
TX_PLL_N
R/W-14h
LEGEND: R/W = Read/Write; W = Write only; -n = value after reset