DS125MB203_15 Datasheet, PDF (32/54 Pages) Texas Instruments – Low-Power 12.5-Gbps Dual-Lane 2:1/1:2 Mux/Buffer

DS125MB203
SNLS432C – OCTOBER 2012 – REVISED DECEMBER 2015
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ADDRESS
REGISTER
NAME
BIT
7
0x42
6
5:3
CH7
NC – S_OUTB1
VOD
2:0
0x43
7
6:5
4:3
CH7
NC – S_OUTB1
DEM
2:0
0x44
7
CH7
6:4
NC – S_OUTB1
Reserved
3:2
1:0
0x45
Reserved
7:0
0x46
Reserved
7:0
0x47
7:4
Reserved
3:0
0x48
7:6
Reserved
5:0
0x49-0x4B
Reserved
7:0
32
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Table 7. SMBUS Slave Mode Register Map (continued)
FIELD
Short Circuit
Protection
MODE Control
Reserved
VOD Control
RXDET Status
Reserved
Reserved
DEM Control
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
TYPE DEFAULT
R/W
0xAD
R
0x02
R/W
R/W
0x00
R/W
0x00
R/W
0x38
R/W
0x00
R/W
0x05
R/W
R/W
0x00
EEPROM
REG BIT
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
DESCRIPTION
1 = Enable the short circuit protection
0 = Disable the short circuit protection
1 = PCIe GEN 1/2, 10GE
0 = PCIe GEN 3, 10G-KR
Note: Override the MODE pin in Reg_08.
Set bits to 101'b
VOD Control:
000'b = 0.6 V
001'b = 0.7 V
010'b = 0.8 V
011'b = 0.9 V
100'b = 1.0 V
101'b = 1.1 (default)
110'b = 1.2
111'b = 1.3
Observation bit for RXDET CH7 - CHA_3
1 = Input 50 Ω terminated to VDD
0 = Input is Hi-Z
Set bits to 0
Set bits to 0
DEM Control
000'b = 0 dB
001'b = –1.5 dB
010'b = –3.5 dB (default)
011'b = –5 dB
100'b = –6 dB
101'b = –8 dB
110'b = –9 dB
111'b = –12 dB
Set bit to 0.
Set bits to 0.
Set bits to 0.
Set bits to 0.
Set bits to 0.
Set bits to 0x38
Set bits to 0.
Set bits to 0.
Set bits to 0.
Set bits to 00 0101'b
Set bits to 0.
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