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ONET1130EC Datasheet(PDF) 41 Page - Texas Instruments

Part # ONET1130EC
Description  ONET1130EC 11.7 Gbps Transceiver with Dual CDRs and Modulator Driver
PDF  64 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

ONET1130EC Datasheet(HTML) 41 Page - Texas Instruments

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ONET1130EC
www.ti.com
SLLSEJ3A – JUNE 2015 – REVISED JULY 2015
8.6.3.6 TX Register 15 (offset = 0000 0000) [reset = 0h]
Figure 56. TX Register 15
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 18. TX Register 15 Field Descriptions
Bit
Field
Type
Reset
Description
7
TXBIAS9
R/W
0h
Bias current settings (8MSB; 2LSBs are in register 16)
Closed loop (APC):
6
TXBIAS8
R/W
0h
Coupling ratio CR = IBIAS / IPD, TXBIAS = 0..1023, IBIAS ≤ 150mA:
5
TXBIAS7
R/W
0 h
TXPDRNG = 00; IBIAS = 0.75μA x CR x TXBIAS
4
TXBIAS6
R/W
0h
TXPDRNG = 01; IBIAS = 1.5μA x CR x TXBIAS
TXPDRNG = 1X; IBIAS = 3μA x CR x TXBIAS
3
TXBIAS5
R/W
0h
Open Loop:
2
TXBIAS4
R/W
0h
IBIAS ~ 156μA x TXBIAS in source mode
1
TXBIAS3
R/W
0h
IBIAS ~ 156μA x TXBIAS in sink mode
0
TXBIAS2
R/W
0h
8.6.3.7 TX Register 16 (offset = 0000 0000) [reset = 0h]
Figure 57. TX Register 16
7
6
5
4
3
2
1
0
Reserved
0
0
Reserved
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 19. TX Register 16 Field Descriptions
Bit
Field
Type
Reset
Description
7
–
R/W
0h
Reserved
Digital photodiode current monitor selection bit (MONP)
6
TXDMONP
R/W
0h
1 = Digital photodiode monitor is active (no external resistor is needed)
0 = Analog photodiode monitor is active (external resistor is required)
Digital bias current monitor selection bit (MONB)
5
TXDMONB
R/W
0h
1 = Digital bias current monitor is active (no external resistor is needed)
0 = Analog bias current monitor is active (external resistor is required)
4:2
–
R/W
0h
Reserved
1
TXBIAS1
R/W
0h
Bias current setting (2 LSBs)
0
TXBIAS0
R/W
0h
Copyright © 2015, Texas Instruments Incorporated
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