TQ-Embedded TQMxE40M

Docs

Datasheet www	TQ-Embedded	link
Datasheet Short	TQ-Embedded	link
Datasheet	TQ-Embedded	link
MX25L25645GM2I-08G	Macronix	3.3V 256Mbit	link
SLB9670	Infineon	TPM2.0	link
88E1512	Marvell	1G Eth	link
24AA32AT	Microchip	32k I2C EEPROM	link

SPI Boot Flash

Flash for carrier:

MX25L25645GM2I-08G	Macronix	3.3V 256Mbit	link

USB

The USB 2.0 port 0 must be paired with USB 3.2 SuperSpeedPlus port 0. The USB 2.0 port 1 must be paired with USB 3.2 SuperSpeedPlus port 1.

HDA

On the COM Express™ connector there is no HDA_SDIN2 signal available.

SPI

The SPI interface can only be used for SPI boot Flash devices.

UART

COM Express™ Signal	COM Express™ Pin	TQMxE40M	Remark
SER0_TX	A98	SER0_TX	3.3 V output
SER0_RX	A99	SER0_RX	3.3 V input
SER1_TX	A101	SER1_TX	3.3 V output
SER1_RX	A102	SER1_RX	3.3 V input
SER0_RTS#	B77	SER0_RTS#	3.3 V output
SER0_CTS#	B78	SER0_CTS#	3.3 V input
SER1_RTS#	B91	SER1_RTS#	3.3 V output
SER1_CTS#	B92	SER1_CTS#	3.3 V input

In Revision 2.1 of the COM Express™ specification, the signals A98, A99, A101 and A102 have been reclaimed from the VCC_12V pool. Therefore protection on the carrier board is necessary to avoid damage to those when accidentally connected to 12 V. The implementation of this circuitry causes lower transfer rates at both serial ports. On the TQMxE40M the protection circuit is removed by default and the serial ports provide transfer rates of up to 115 kbaud. Therefore the TQMxE40M can only be used in COM.0 Revision 2.1 and 3.0 Type10 pinout carrier boards.

CAN

The TQMxE40M provides a CAN interface. The signals for the CAN interface are shared with the serial port (SER1) signals and can be configured via a register setting.

DEBUG

The TQMxE40M includes a 14-pin flat cable connector, to connect an external debug module (TQ specific), to provide BIOS post code information, debug LEDs and a JTAG interface for on-board FPGA. This header is intended for TQ internal use only!