4. Supported FPGAs

The pin mapping of the SoC signals to the board pins is described for each supported board:

4.1. ARTY 100t

Fig. 4.1 Arty-100t FPGA Board from Digilent

4.1.1. Resource Summary

All values are post implementation:

• Closure Frequency : 50MHz

• LUT utilization : 84%

• BRAM utilization : 57%

• LUTRAM utilization : 6%

• DSP utilization : 7%

4.1.2. FPGA Board Connector Mapping

The following table shows the pin configuration of ChromiteM SoC on the Xilinx Arty-100T FPGA. The connector group and pin names are as indicated on the Xilinx Arty-100T board.

Table 4.1 Pin mapping for the Arty-100t Board

Connector Group	Connecter Pin Name	Soc Signal Name
J3	IO0	gpio[0]
	IO1	gpio[1]
	IO2	gpio[2]
	IO3	gpio[3]
	IO4	gpio[4]
	IO5	gpio[5]
	IO6	gpio[6]
	IO7	gpio[7]
	IO8	gpio[8]
	IO9	gpio[9]
	IO10	gpio[10]
	IO11	gpio[11]
	IO12	gpio[12]
	IO13	gpio[13]
J7	A0	gpio[14]
	A1	gpio[15]
	A2	gpio[16]
	A3	gpio[17]
	A4	gpio[18]
	A5	gpio[19]
NA	LD4	gpio[20]
NA	LD5	gpio[21]
NA	SW0	boot_config[0]
NA	SW1	boot_config[1]
NA	LED0_B	pwmout[0]
NA	LED0_G	pwmout[1]
NA	LED0_R	pwmout[2]
J2	IO26	pwmout[3]
J2	IO27	pwmout[4]
J2	IO28	pwmout[5]
J2	IO29	spi1_mosi
J2	IO30	spi1_sclk
J2	IO31	spi1_miso
J2	IO32	spi1_nss[0]
J2	IO33	spi1_nss[1]
J6	5	spi2_mosi
J6	2	spi2_sclk
J6	3	spi2_nss
J6	1	spi2_miso
JA	1	qspi0_mv_ncs_o
JA	2	qspi0_mv_io_o[0]
JA	3	qspi0_mv_io_o[1]
JA	4	qspi0_mv_clk_o
JA	9	qspi0_mv_io_o[2]
JA	10	qspi0_mv_io_o[3]

Note

The serial communication happens using uart0 connected to the FPGA package pins D10 and A9, which communicate to the host system through the micro-USB port (connector J10).

The debug interface of the processor is connected to the Xilinx JTAG tap, which in-turn is time multiplexed with uart0, and is connected to the micro-USB port. This configuration let’s us to not have dedicated JTAG pins, thereby eliminating the need for an external JTAG Debug probe (like J-Link).

Note

The DDR controller (of Xilinx) uses the default pin configuration as specified by Xilinx.

Note

The SPI0 is used to interface flash.

Table 4.2 Selecting Boot Configuration from Arty-100t Board

Connector Group	Value	Soc Signal Name
SW1:SW0	00	Debug Mode
SW1:SW0	01	Jump to OCM
SW1:SW0	10	Jump to DDR

Note

The ETHLite (of Xilinx) uses the default pin configuration as specified by Xilinx.