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The PEX8605 TQFP RDK supports the use of one configuration module slot to provide flexibility in the routing of PCIe lane 1 to either the x4 PCIe edge connector or to one of the PCIe slots. The Configuration Module enables the RDK to support the following port configurations: Table 1.
PEX8605 TQFP-AIC RDK 1.3 Getting Started Figure 2. Getting Started Follow the following steps to use the RDK. 1) Plug board into x16 PCI Express slot on motherboard. 2) Check and set dipswitches for desired port configuration. 3) Check that the correct configuration module is plugged into the socket.
2.4 PCI Express Upstream Port Connection The upstream x4 connector can be configured as a x1 or x2 link connecting the PEX8605 to the add-in card male edge connector. The PEX8605 RDK can plug into x1 PCI Express slots by using a PCI Express lane converter, such as PCI Express X4-To-X1 Converter made by Adex Electronics.
Table 3. SW1 Functions SW1 Functional Description Switch Position Settings L = x1 x1 x1 PORTCFG0 H = X2 x1 Used to select the PEX8605’s Port configuration. Default Setting = L L = Enables SMBUS Mode SMBUS_EN# H = Enables I...
GPIO0 Factory Test Only Default Setting = H Used to define the default value of the three least significant bits of the PEX8605 I2C/SMBus 7-bit Slave address. CADDR[2:0] C Lower Slave Address Bits Default Setting = LLL Table 5. SW3 Functions...
Voltage monitoring circuits are placed close to the PEX8605 chip. If the supplies are off 10% of their normal values, red LED(s) will be turned on to signal the potential voltage problem to the chip. Bypass capacitors, plane capacitors are used to filter out the voltage noise.
PEX8605 internal registers, run internal output probe mode, monitor error counters, and monitor status of all ports. The PEX8605 RDK provides a 10 pin I2C header (JP2). The pin header included is compatible with the Aardvark I2C/SPI Host Adapter Part Number: TP240141 by TotalPhase.
2.14 Reset Circuitry The reset circuit of PEX8605 RDK contains a two input AND gate and a reset chip. The PERST# from the PCI Express male connector and the manual reset from the pushbutton switch input to the AND gate and the output of the AND gate is fed into the reset chip.
PEX8605 TQFP-AIC RDK Figure 11. Manual PERST# button 2.15 Port Good Indicator LEDs Each PCIe port has a port status indicator associated with it. They are grouped in the upper-left corner of the board for easily visibility. The port indicator LED is either on, off, or flashing to indicate the link status.
PEX8605 TQFP-AIC RDK 2.16 PCIe Protocol Debug All PCIe Lanes pass through an Agilent soft touch midbus probe footprint in order to monitor PCIe traffic. Figure 13: Midbus 2.0 Probe Footprint 2.17 WAKE# and Vaux Support The Wake# signals will be connected together and Vaux will be routed from the upstream port to all downstream slots.
3 RDK Configurations The PEX8605 RDK can be configured to operate in one of several modes as described in this section. The modes can be entered by changing jumpers and configuration modules. The configuration modules control the routing of the PCIE lanes and Refclk, and the strap pin dipswitches configures the modes of the PEX8605.
PEX8605 TQFP-AIC RDK 3.2 Hardware Strap Pins The PEX8605 RDK has a number of strap pins which provide the capability to perform various types of hardware initialization without the use of EEPROM. Table 9 shows the port configuration strap pin values.
PEX8605 TQFP-AIC RDK 3.4 Hardware Jumpers The PEX8605 RDK has a few jumper settings for testing purposes. These can be left at their default settings, as detailed below: Table 10. PEX8605 RDK Jumper Settings Jumper Default Setting Description Connects the EE_CS# signal of the PEX8605 to the EEPROM.Can be used to disable the EEPROM for testing.
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