Datasheet

DS80PCI800
SNLS334E –APRIL 2011–REVISED MARCH 2012 www.ti.com
Table 9. SMBUS Slave Mode Register Map (continued)
Address Register Name Bit (s) Field Type Default Description
0x08 Override 7 Reserved R/W 0x00 Set bit to 0.
Pin Control
6 Override SD_TH 1: Block SD_TH pin control
0: Allow SD_TH pin control
5 Reserved Set bit to 0.
4 Override IDLE 1: IDLE control by registers
0: IDLE control by signal detect
3 Override RXDET 1: Block RXDET pin control
0: Allow RXDET pin control
2 Override RATE 1: Block RATE pin control
0: Allow RATE pin control
1 Reserved Set bit to 0.
0 Reserved Set bit to 0.
0x0E CH0 - CHB0 7:6 Reserved R/W 0x00 Set bits to 0.
IDLE, RXDET
5 IDLE_AUTO 1: Automatic IDLE detect
0: Allow IDLE_SEL control in bit 4
Note: override IDLE control.
4 IDLE_SEL 1: Output is MUTED (electrical idle)
0: Output is ON
Note: override IDLE control.
3:2 RXDET 00: Input is high-z impedance
01: Auto RX-Detect,
outputs test every 12 ms for 600 ms (50 times) then
stops; termination is high-z until detection; once
detected input termination is 50 Ω
10: Auto RX-Detect,
outputs test every 12 ms until detection occurs;
termination is high-z until detection; once detected
input termination is 50 Ω
11: Input is 50 Ω
Note: override RXDET pin.
1:0 Reserved Set bits to 0.
0x0F CH0 - CHB0 7:0 EQ Control R/W 0x2F IB0 EQ Control - total of 256 levels.
EQ See Table 2.
0x10 CH0 - CHB0 7 Short Circuit R/W 0xAD 1: Enable the short circuit protection
VOD Protection 0: Disable the short circuit protection
6 RATE_SEL 1: Gen 1/2,
0: Gen 3
Note: override the RATE pin.
5:3 Reserved Set bits to default value - 101.
2:0 VOD Control OB0 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
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