DS125MB203_15 Datasheet, PDF (29/54 Pages) Texas Instruments – Low-Power 12.5-Gbps Dual-Lane 2:1/1:2 Mux/Buffer

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DS125MB203
SNLS432C – OCTOBER 2012 – REVISED DECEMBER 2015
Table 7. SMBUS Slave Mode Register Map (continued)
ADDRESS
REGISTER
NAME
BIT
FIELD
TYPE DEFAULT
EEPROM
REG BIT
DESCRIPTION
7
Short Circuit
Protection
Yes
1 = Enable the short circuit protection
0 = Disable the short circuit protection
6
MODE Control
1 = PCIe GEN 1/2, 10GE
Yes
0 = PCIe GEN 3, 10G-KR
Note: Override the MODE pin in Reg_08.
0x34
5:3
CH5
NC – S_OUTB0
VOD
2:0
Reserved
R/W
0xAD
VOD Control
Yes
Set bits to 101'b
VOD control:
000'b = 0.6 V
001'b = 0.7 V
010'b = 0.8 V
Yes
011'b = 0.9 V
100'b = 1.0 V
101'b = 1.1 (default)
110'b = 1.2
111'b = 1.3
7
RXDET Status
R
Observation bit for RXDET CH5 - CHA1
1 = Input 50 Ω terminated to VDD
0 = Input is Hi-Z
6:5
Reserved
Set bits to 0
0x35
4:3
CH5
NC – S_OUTB0
DEM
2:0
Reserved
DEM Control
0x02
R/W
Set bits to 0
DEM control
000'b = 0 dB
001'b = –1.5 dB
010'b = –3.5 dB (default)
Yes
011'b = –5 dB
100'b = –6 dB
101'b = –8 dB
110'b = –9 dB
111'b = –12 dB
0x36
7
CH5
6:4
NC – S_OUTB0
Reserved
3:2
1:0
Reserved
Reserved
Reserved
Reserved
R/W
0x00
Yes
Set bit to 0
Set bits to 0
Yes
Set bits to 0
Yes
Set bits to 0
0x37-0x38
Reserved
7:0
Reserved
R/W
0x00
Set bits to 0
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