Copyright
©
2010
congatec
AG
QTOPm14
55/80
Table 30
Manufacturing Signal Descriptions
Signal
Pin #
Description
I/O
PU/PD Comment
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.
NA
NA
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.
NA
NA
Optional UART TxD
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.
NA
NA
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.
NA
NA
Optional UART RxD
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.
NA
NA
RSVD
124
Do not connect.
NA
NA
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.
