DS80PCI800 Datasheet, PDF (21/39 Pages) Texas Instruments – 2.5 Gbps / 5.0 Gbps / 8.0 Gbps 8 Channel PCI Express Repeater with Equalization and De-Emphasis

Table 9: SMBUS Slave Mode Register Map
Address Register Name
0x00
Observation,
Reset
0x01
PWDN Channels
0x02
0x05
0x06
Override
PRSNT Control
Slave Mode CRC
Bits
Slave CRC Control
0x08
Override
Pin Control
Bit (s) Field
7
Reserved
6:3 Address Bit
AD[3:0]
2
EEPROM Read
Done
1
Block Reset
0
Reset
7:0 PWDN CHx
7:1 Reserved
0
Override PRSNT
7:0 CRC bits
7:5 Reserved
4
Reserved
3
Slave CRC
2:0 Reserved
7
Reserved
6
Override SD_TH
5
Reserved
4
Override IDLE
3
Override RXDET
2
Override RATE
1
Reserved
0
Reserved
Type
R/W
R
R
R/W
R/W
R/W
R/W
R/W
Default
0x00
0x00
0x00
0x00
Description
Set bit to 0.
Observation of AD[3:0] bit
[6]: AD3
[5]: AD2
[4]: AD1
[3]: AD0
1: Device completed the read from external
EEPROM.
1: Block bit 0 from resettting the registers; self
clearing.
SMBus Reset
1: Reset registers to default value; self clearing.
Power Down per Channel
[7]: CH7 – CHA_3
[6]: CH6 – CHA_2
[5]: CH5 – CHA_1
[4]: CH4 – CHA_0
[3]: CH3 – CHB_3
[2]: CH2 – CHB_2
[1]: CH1 – CHB_1
[0]: CH0 – CHB_0
00'h = all channels enabled
FF'h = all channels disabled
Note: override PRSNT pin.
Set bits to 0.
1: Block PRSNT pin control
0: Allow PRSNT pin control
CRC bits [7:0]
R/W 0x10
R/W 0x00
Set bits to 0.
Set bit to 1.
1: Disables the slave CRC mode
0: Enables the slave CRC mode
Note: In order to change VOD, DEM and EQ of
the channels in slave mode, set bit to 1 to disable
the CRC.
Set bits to 0.
Set bit to 0.
1: Block SD_TH pin control
0: Allow SD_TH pin control
Set bit to 0.
1: IDLE control by registers
0: IDLE control by signal detect
1: Block RXDET pin control
0: Allow RXDET pin control
1: Block RATE pin control
0: Allow RATE pin control
Set bit to 0.
Set bit to 0.
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