SNLU288 December   2020

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Features
    2. 1.2 Applications
  3. 2Description
    1. 2.1  DS160PR412 and DS160PR421 4-Level I/O Control Inputs
    2. 2.2  DS160PR412 and DS160PR421 Modes of Operation
    3. 2.3  DS160PR412 and DS160PR421 SMBus or I2C Register Control Interface
    4. 2.4  DS160PR412 and DS160PR421 Equalization Control
    5. 2.5  DS160PR412 and DS160PR421 RX Detect State Machine
    6. 2.6  DS160PR412 and DS160PR421 DC Gain Control
    7. 2.7  DS160PR412-421EVM Global Controls
    8. 2.8  DS160PR412-421EVM Downstream Devices Control
    9. 2.9  DS160PR412-421EVM Upstream Devices Control
    10. 2.10 Quick-Start Guide (Pin Mode)
    11. 2.11 Quick-Start Guide (SMBus Slave Mode)
  4. 3Schematics
  5. 4PCB Layouts
  6. 5Bill of Materials

2.10 Quick-Start Guide (Pin Mode)

Check that the shunts are at the following positions as Table 2-10 shows.

Table 2-10 Pin Mode Shunt Configuration

SHNT#

HEADER

SHUNT ACROSS PINS

1

JMP1

1-2

2

JMP1

7-8

3

JMP1

13-14

4

JMP2

1-2

5

JMP2

7-8

6

JMP2

13-14

7

JMP11

1-2

8

JMP11

7-8

9

JMP11

13-14

10

JMP14

1-2

11

JMP14

7-8

12

JMP14

13-14

13

JMP7

1-2

14

JMP8

2-3

15

JMP17

1-2

16

J17

1-2

17

J17

3-4

18

J17

5-6

19

JMP18

2-3

20

JMP19

2-3

21

JMP20

2-3

The redrivers are configured to operate in Pin Mode (MODE pins tied to L0).
  1. RX_Detect state machine of all redrivers is enabled by leaving RX_DET pin open.
  2. The redrivers are enabled (PWDN pins tied to GND).
  3. The board is configured for any PCIe bus width.
  4. DC Gain of all redrivers is set to 0 dB by leaving the GAIN config pin open for the redrivers.
  5. EQ level of the RX CTLEs of all redrivers is set to 7 dB at 8 GHz by default.
  6. If necessary, adjust EQ levels of the downstream and upstream redrivers, or both, by arranging shunts on JMP1, JMP2 for downstream redrivers and JMP11 and JMP14 for the upstream redrivers.
  7. Plug the EVM into a PCIe x16 server motherboard slot. Ensure the motherboard is powered down before installing the EVM or configured for hot-plug operation.
  8. Install a compatible PCIe endpoint card into one of the PCIe connectors on the EVM based on configuration of the SEL pin. Note: PCIe-A requires enabling bifurcation on the motherboard.
  9. Power-up the motherboard.