XTAG-2 Hardware Manual (1.0)
4.2
XMOS Link Configuration
Some of the I/O pins on the processor are configured as a duplex 2-bit serial XMOS
Link. The mapping of XMOS Link to the pins is shown in the table below:
Pin
XMOS Link
XD4
XL1_UP1
XD5
XL1_UP0
XD6
XL1_DN0
XD7
XL1_DN1
4.3
JTAG Configuration
Some of the I/O pins on the processor are driven by the JTAG signals. The mapping
of the signals to the pins is shown in the table below:
Pin
Port
Processor
XD0
P1A0
TDSRC
XD1
P1B0
TDSNK
XD10
P1C0
TMS
XD11
P1D0
TCK
XD35
P1L0
TRST_N
4.4
System Reset
The system reset signal is mapped to a 1-bit port on the processor as described
below. It is used as an output to reset the target processor from the debugger
Pin
Port
Processor
XD36
P1IM
RST_N
5
13MHz Crystal Oscillator
The XS1-L1 is clocked at 13MHz by a crystal oscillator on the card. The processor is
clocked at 400MHz and the I/O ports at 100MHz, by an on-chip phaselocked loop
(PLL).
www.xmos.com