DS125BR800A Datasheet, PDF (31/53 Pages) Texas Instruments – Low-Power 12.5-Gbps 8-Channel (Unidirectional) Repeater With Input Equalization

DS125BR800A
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0x34
CH5 - CHA1
VOD
0x35
CH5 - CHA1
DEM
0x36
CH5 - CHA1
IDLE Threshold
SNLS467 – NOVEMBER 2013
Table 11. SMBUS Slave Mode Register Map (continued)
7
Short Circuit
Protection
6
MODE_SEL
5:3 Reserved
2:0 VOD Control
7
RXDET STATUS
6:5 MODE_DET
STATUS
4:3 Reserved
2:0 DEM Control
7:4 Reserved
3:2 IDLE tha
1:0 IDLE thd
R/W 0xAD
R
0x02
R
R/W
R/W
R/W 0x00
1: Enable the short circuit protection
0: Disable the short circuit protection
1: Gen 1/2,
0: SAS-3 and PCIe Gen-3
Note: override the MODE pin.
Set bits to default value - 101.
OA1 VOD Control
000: 0.7 V
001: 0.8 V
010: 0.9 V
011: 1.0 V
100: 1.1 V
101: 1.2 V (default)
110: 1.3 V
111: 1.4 V
Observation bit for RXDET CH5 - CHA1.
1: RX = detected
0: RX = not detected
Observation bit for MODE_DET CH5 - CHA1.
00: GEN1 (2.5G)
01: GEN2 (5G)
11: GEN3 (8G)
Note: Only functions when Mode pin = Automatic
Set bits to 0.
OA1 DEM Control
000: 0 dB
001: –1.5 dB
010: –3.5 dB (default)
011: –5 dB
100: –6 dB
101: –8 dB
110: –9 dB
111: –12 dB
Set bits to 0.
Assert threshold (1010 pattern 12 Gbps)
00 = 50 mVp-p (default)
01 = 40 mVp-p
10 = 75 mVp-p
11 = 58 mVp-p
Note: override the SD_TH pin.
De-assert threshold (1010 pattern 12 Gbps)
00 = 37 mVp-p (default)
01 = 22 mVp-p
10 = 55 mVp-p
11 = 45 mVp-p
Note: override the SD_TH pin.
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