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SW12
SDA/SCL to
SMCLK/SMDAT
“ON” connect the SDA/SCL bus to the PCIe SMCLK and SMDAT bus.
Default is “OFF”.
SW13 READ_EN
ENSMB = FLOAT – SMBUS (master mode – load configuration from EEPROM)
SW6: SD_TH becomes the READ_EN pin.
To start the loading at power up, set SW6 pin 3 to “ON” position (pull to GND).
To manually control the start, set SW6 to “OFF” position and set SW8 pin1 to “ON”
and pin2 to “OFF” position and push the SW13 button for the high to low transition to
start the loading. When the loading is complete the LEDs – D1 thru D4 light should
turn OFF.
SW14 PRSNT
“ON” connects the PCIe PRSNT signal to the device PRSNT pin.
For 16X, set all the switches to the “ON” position.
Quick Start User Guide:
1. Connect J1 – PCIe 16x edge finger to the motherboard (root complex)
2. Connect J2 - PCIe 16x connector to an add-in card (end point).
3. For 3.3V mode operation, set J3 jumper to ON and do not use J4 (leave jumper OFF).
For 2.5V mode operation, set J3 jumper to OFF and set J4 jumper to ON (1-2 and 3-4).
4. Set jumper – J7 for VIH connection to VIN (3.3V) or VDD (2.5V). Default is 1-2 set to ON for VIH = 3.3V.
5. Set SW7 – VDD_SEL1_2 and VDD_SEL3_4 to “ON” position for 3.3V mode operation.
6. Set the control pins for normal operation
SW10 – RXDET = F (continuous receiver detection): set switches (3-2-1) = (OFF-OFF-OFF).
RXDET = 1 (50 ohm input termination): set switches (3-2-1) = (OFF-OFF-
ON
).
SW10 – RATE = F (enable rate detection): set switches (6-5-4) to (OFF-OFF-OFF).
RATE = R (GEN3 mode): set switches (6-5-4) = (OFF-
ON
-OFF).
RATE = 0 (GEN1,2 mode): set switches (6-5-4) = (
ON
-OFF-OFF).
SW6 – SD_TH = F (default signal detect threshold level): set switches (3-2-1) = (OFF-OFF-OFF).
SW6 – LPBK - RES = F (normal operation): set switches (6-5-4) = (OFF-OFF-OFF).
SW8: Set switches to “OFF” position.
SW9: Set switches to “OFF” position.
SW14 – PRSNT = GND (enables the device): set switches to “ON” position.
5. Set the input equalization level.
For external pin mode control of the equalization level:
Set ENSMB = 0 (1kohm to GND) by using the SW2 (3-2-1) = (
ON
-OFF-OFF).
SW4 pin1,2 must be set to the OFF positions, so the SMBUS signals are disconnected.
Refer to Table 1 for information on the 3 switch settings for the 4 level input.
Example:
Set EQB[1:0] with SW1 for the B bank of inputs (top 2 left inputs of DS80PCI800).
SW1 (6-5-4),(3-2-1) = (OFF-
ON
-OFF), (OFF-
ON
-OFF) = EQB[1:0] = R,R = 14.6 dB at 4 GHz (level 6).
Set EQA[1:0] with SW11 for the A bank of inputs (bottom 2 left inputs of DS80PCI800).
SW8 (6-5-4),(3-2-1) = (OFF-
ON
-OFF), (OFF-
ON
-OFF) = EQA[1:0] = R,R = 14.6 dB at 4 GHz (level 6).
The table below is the 16 possible EQ settings when in pin mode.
Level EQA/B[1:0]
SW1 - EQB[1:0]
SW11 - EQA[1:0]
EQ (dB) at 4 GHz
6 5 4 3 2 1
1 0,
0
ON
OFF OFF
ON
OFF OFF
4.9
2 0,
R
ON
OFF OFF OFF
ON
OFF 7.9
3 0,
F
ON
OFF OFF OFF OFF OFF
9.9
4 0,
1
ON
OFF OFF OFF
OFF
ON
11.0
5 R,
0
OFF
ON
OFF
ON
OFF OFF
14.3
6 R,
R
OFF
ON
OFF OFF
ON
OFF 14.6
7 R,
F
OFF
ON
OFF OFF OFF OFF
17.0
