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Version 1.09
SD_D2
FX3_DQ3
149
150
FX3_DQ4
SD_D3
3
FX3_DQ1
151
152
FX3_DQ6
SD-Card detect
UART_RX
FX3_DQ0
153
154
FX3_DQ5
UART_TX
FX3_DQ2
155
156
GND
GND
157
158
JTAG_TCK
USB_DP
159
160
JTAG_TDI
USB_DM
161
162
JTAG_TMS
USB_VBUS
163
164
JTAG_TDO
USB_ID
165
166
USB_CPEN
GND
167
168
RSVD_P168
ETH_A_N
169
170
RSVD_P170
BOOT_MODE1
ETH_A_P
171
172
GND
ETH0_LED1#
173
174
I2C_INT#
ETH0_LED2#
175
176
I2C_SDA
ETH_B_N
177
178
I2C_SCL
ETH_B_P
179
180
GND
ETH_CTREF
181
182
FLASH _CLK
ETH_C_N
183
184
FLASH_DO
ETH_C_P
185
186
FLASH_DI
ETH1_LED1#
187
188
FLASH_CS#
ETH1_LED2#
189
190
BOOT_MODE
ETH_D_N
191
192
SRST#_RDY#
ETH_D_P
193
194
FPGA_DONE
GND
195
196
POR#_LOAD#
VCC_3V3
197
198
VMON_P198
VCC_3V3
199
200
VBAT
Table 5: J200
–
Mars module connector
2.8.2
J400
–
USB 2.0 Micro-B Connector
The USB 2.0 Micro-B Connector J400 allows simple RS232 communication between a host computer
and the Mars PM3 board using the USB interface. The USB 2.0 UART device U401 can be accessed
from the host computer using a virtual COM port driver to display debug messages or sending control
commands to the Mars PM3 board. The UART device is connected to the Mars module and the FX3
controller; make sure that the RX line is only driven by one device!
Normally the USB UART is connected to pins 34 and 36 of the Mars connector like the previous
versions of the Mars PM3. If DIP switch 4 of CFG-B is set to ON the UART will be routed to pins 153