Table 26 Manufacturing/Jtag Signal Descriptions - Congatec Qseven conga-QMX6 User Manual

RSVD 132, Do not connect
134,
144,
146,
154
GP_1-Wire_Bus 124 General Purpose 1-Wire bus interface. Can be used for consumer electronics control bus
(CEC) of HDMI.
Note
* The WDOUT signal is high by default on the conga-QMX6. Implement a reverse circuit on the carrier board to set the signal low by default.
Table 26 Manufacturing/JTAG Signal Descriptions
Signal Pin # Description
MFG_NC0 207 This pin is reserved for manufacturing and debugging purposes. May be used as JTAG_TCK signal for
boundary scan purposes during production or as a vendor specific control signal. When used as a vendor
specific control signal the multiplexer must be controlled by the MFG_NC4 signal.
MFG_NC1 209 This pin is reserved for manufacturing and debugging purposes. May be used as JTAG_TDO signal for
boundary scan purposes during production. May also be used, via a multiplexer, as a UART_TX signal to
connect a simple UART for firmware and boot loader implementations. In this case the multiplexer must be
controlled by the MFG_NC4 signal.
MFG_NC2 208 This pin is reserved for manufacturing and debugging purposes. May be used as JTAG_TDI signal for
boundary scan purposes during production. May also be used, via a multiplexer, as a UART_RX signal to
connect a simple UART for firmware and boot loader implementations. In this case the multiplexer must be
controlled by the MFG_NC4 signal.
MFG_NC3 210 This pin is reserved for manufacturing and debugging purposes. May be used as JTAG_TMS signal for
boundary scan purposes during production. May also be used, via a multiplexer, as vendor specific BOOT
signal for firmware and boot loader implementations. In this case the multiplexer must be controlled by the
MFG_NC4 signal.
MFG_NC4 204 This pin is reserved for manufacturing and debugging purposes. May be used as JTAG_TRST# signal for
boundary scan purposes during production. May also be used as control signal for a multiplexer circuit on
the module enabling secondary function for MFG_NC0..3 ( JTAG / UART ). When MFG_NC4 is high active
it is being used for JTAG purposes. When MFG_NC4 is low active it is being used for UART purposes.
Note
The MFG_NC0..4 pins are reserved for manufacturing and debugging purposes. It's recommended to route the signals to a connector on
the carrier board. The carrier board must not drive the MFG_NC-pins or have pull-up or pull-down resistors implemented for these signals.
MFG_NC0...4 are defined to have a voltage level of 3.3V. It must be ensured that the carrier board has the correct voltage levels for JTAG/
UART signals originating from the module. For this reason, a level shifting device may be required on the carrier board to guarantee that these
voltage levels are correct in order to prevent damage to the module. More information about implementing a carrier board multiplexer can
be found in the Qseven Design Guide.
®
Copyright © 2013 congatec AG
NC
I/O 3.3V
QMX6m12
Currently implemented
as HDMI Consumer
Electronics Control Bus.
I/O PU/PD Comment
NA NA
NA NA See caution statement
below
NA NA See caution statement
below
NA NA
NA NA
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