
49
AXC003 Processor FPGA Overview
DesignWare ARC AXC003 CPU Card User Guide
Version 6323-018
Synopsys, Inc.
May 2017
Note
The AXC003 Processor FPGA includes a pushbutton labeled
SW801 CONF
. This
pushbutton is for reconfiguring the CPU card FPGA. Pushing this button forces loading
the ARC CPU image to the FPGA, depending on the SW802 dipswitch settings
Debug
The ARC cores provide debug access using an IEEE 1149.1 JTAG port. In the AXC003
Processor FPGA the JTAG ports of the different ARC cores are daisy-chained into a JTAG
chain, where the data output from the first core becomes the data input to the second core
and so forth; the control and clock signals are common to all the cores in the chain. The JTAG
chain for the AXC003 Processor FPGA is shown in Figure 30.
JTAG Daisy-Chain
To distinguish between the individual cores in the JTAG chain, each core has a unique JTAG
IDCODE as listed in Table 11.
Table 11
JTAG ID Codes
Core
JTAG ID bit [31:0]
ARC ID
CPUNUM
ARC HS36
0x2014_24B1
0x0553
1
ARC HS38x2, core 1
0x2000_24B1
0x0053
1
ARC HS38x2, core 2
0x2004_24B1
0x0153
2