Seco Q7-A75-J User Manual page 24

Module with nxp i.mx6 processor

Hide thumbs

Table of Contents

3.2.1.1 PCI Express interface signals

The μQ7-A75-J module can offer one PCI Express lane, which is directly managed by i.MX6 processor (all versions).

PCI express Gen 2.0 (5Gbps) is supported. Of the previous generation, only PCI express 1.1 is supported.

Here following the signals involved in PCI express management

PCIE0_TX+/PCIE0_TX-: PCI Express lane #0, Transmitting Output Differential pair

PCIE0_RX+/PCIE0_RX-: PCI Express lane #0, Receiving Input Differential pair

PCIE_CLK_REF+/ PCIE_CLK_REF-: PCI Express Reference Clock for lane #0, Differential Pair

PCIE_RST#: Reset Signal that is sent from Qseven

resistor; it can be used directly to drive externally a single RESET Signal. In case there is the need to supply Reset signal to multiple devices, it is recommended to

provide for a buffer on the carrier board.

3.2.1.2 UART interface signals

Rel. 2.0 specifications, μQ7-A75-J module offers one UART interface, directly managed by i.MX6 processor (all versions), more exactly

According to the Qseven

by UART port #3.

Here following the signals related to UART interface:

UART0_TX: UART Interface, Serial data Transmit (output) line, +3P3V_S electrical level

UART0_RX: UART Interface, Serial data Receive (input) line, +3P3V_S electrical level with 10kΩ pull-up

UART0_RTS#: UART Interface, Handshake signal, Request to Send (output) line, +3P3V_S electrical level

UART0_CTS#: UART Interface, Handshake signal, Clear to Send (Input) line, +3P3V_S electrical level with 10kΩ pull-up.

Please consider that interface is at TTL electrical level; therefore, please evaluate well the typical scenario of application. If there isn't any explicit need of interfacing

directly at TTL level, for connection to standard serial ports commonly available (like those offered by common PCs, for example) it is mandatory to include an RS-

232 transceiver on the carrier board.

All of the above mentioned signals can also be used for different functionalities; please refer to the pin muxing table for more details.

μQ7-A75-J

Module to any PCI-e device available on the carrier board. It is a 3.3V active-low signal with a 10kΩ pull-up

Table of Contents