ThingMagic Mercury xPRESS Platform v1.7 - Manual (Page 117)

A D I V I S I O N O F T R I M B L E
Hardware Reference Guide 117
Communications Interface Bus Connector
The Communications Bus is accessed through a Hirose DF9 series, 51 contact connector (0.5A
max). Its stacking height is 4.3mm (.169”).
The UART pins are shared between the first and second connector, but are swapped (pins 3-6
and 7-9). This way, one module could use both interfaces, or two identical single-interface
modules could use pins 3-6 and not interfere with each other.
Note: As configured, GPIO0 and GPIO1 are connected to high drive pins and can source up to
24mA. GPIO2-5 are low drive, and can also be used as ADC inputs.
Signal Pin Pin Signal
GND 1 2 GND
RXD1/2 3 4 TXD1/2
RTS1/2 5 6 CTS1/2
RXD2/1 7 8 TXD2/1
RTS2/1 9 10 CTS2/1
CANTX0 11 12 CANRX0
AD0 13 14 AD1
DAC0 15 16 DAC1
MISO 17 18 MOSI
SPCK 19 20 NPCS0
NPCS1 21 22 GPIO0
GPIO1 23 24 GPIO2
GPIO3 25 26 GPIO4
GPIO5 27 28 GND
GND 29 30 SDA
SCK 31 32 ID0
ID1 33 34 ID2
RFID_GPIO0 35 36 RFID_GPIO1
RFID_GPIO2 37 38 RFID_GPIO3
GND 39 40 GND
V_3R3 41 42 V_3R3
V_SYS 43 44 V_SYS
GND 45 46 GND
V_POE 47 48 V_POE
V_POE 49 50 V_POE
V_POE 51