DS125BR820 Datasheet, PDF (39/62 Pages) Texas Instruments – Low-Power 12.5 Gbps 8-Channel Linear Repeater

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DS125BR820
SNLS491B – JULY 2014 – REVISED FEBRUARY 2015
Address
Register
Name
0x44
CH7 - CHA_3
SD_TH
0x45
0x46
0x47
0x48
0x49-
0x4B
0x4C
0x4D-
0x50
0x51
0x52-
0x55
0x56
0x57
0x58
0x59
0x5A
0x5B
0x5C-
0x61
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Device ID
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Table 9. SMBus Slave Mode Register Map (continued)
Bit
Field
Type Default
EEPROM
Reg Bit
Description
7
Reserved
Yes Set bit to 0
6:4 Reserved
Set bits to 0
Signal Detect
3:2 Status Assert
Threshold
R/W 0x00
Status Assert threshold (1010 pattern 12 Gbps)
00'b = 50 mVp-p (default)
01'b = 40 mVp-p
Yes 10'b = 75 mVp-p
11'b = 58 mVp-p
Note: Override SD_TH pin and enable register control
via Reg 0x08[6]
Signal Detect
1:0
Status
De-assert
Threshold
Status De-assert threshold (1010 pattern 12 Gbps)
00'b = 37 mVp-p (default)
01'b = 22 mVp-p
Yes 10'b = 55 mVp-p
11'b = 45 mVp-p
Note: Override SD_TH pin and enable register control
via Reg 0x08[6]
7:0 Reserved R/W 0x00
Set bits to 0
7:0 Reserved R/W 0x38
Set bits to 0x38
7:4 Reserved
R/W 0x00
3:0 Reserved
Set bits to 0
Yes Set bits to 0
7:6 Reserved R/W
0x05
5:0 Reserved R/W
Yes Set bits to 0
Set bits to 00 0101'b
7:0 Reserved R/W 0x00
Set bits to 0
7:3 Reserved R/W
2:1 Reserved R/W 0x00
0
Reserved R/W
Yes Set bits to 0
Set bits to 0
Yes Set bits to 0
7:0 Reserved R/W 0x00
Set bits to 0
7:5 VERSION
4:0
ID
R 0x85
100'b
0 0101'b
7:0 Reserved R/W 0x00
Set bits to 0
7:0 Reserved R/W 0x10
7:0 Reserved R/W 0x64
7:0 Reserved R/W 0x21
7:1 Reserved
R/W 0x00
0
Reserved
7:0 Reserved R/W 0x54
7:0 Reserved R/W 0x54
Set bits to 0x10
Set bits to 0x64
Set bits to 0x21
Set bits to 0
Yes Set bit to 0
Yes Set bits to 0x54
Yes Set bits to 0x54
7:0 Reserved R/W 0x00
Set bits to 0
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