Serial Prom Socket (U1); Relaxation Oscillator Components (R1 C5, R2 C6) - Xilinx MultiLINX Series Hardware User's Manual

Pin Name
J1–15 N.C.b
J1–17 RST
a. Denotes pins supported by the Parallel Cable III
b. No pin connection

Serial PROM Socket (U1)

Relaxation Oscillator Components (R1 C5, R2 C6)

Hardware User Guide
Table 3-7 XChecker/Parallel Cable III Connector J1
Function
b
Connects to jumper
J5. If connected,
allows XChecker
Cable to provide a
Reset input (same as
pressing Reset
button).
Jumper J5 allows the XChecker Cable signal RST on J1-17 to drive the
reset line on the demonstration board. Tiepoint pins jumper the
following XChecker Cable signals into your circuit. Tiepoint J3-1
connects to TRIG on J1-6; Tiepoint J3-2 connects to CLK1 on J1-16;
and, Tiepoint J3-3 connects to CLK0 on J1-18. See the preceding table
for more information on cable connections.
This serial PROM configures the XC3020A. You must use the master
serial mode to configure from the serial PROM.
R1, C5 and R2, C6 are two RC networks that connect to the XC3020A
at pins 12 and 14. These RC networks are for use in a relaxation oscil-
lator such as the circuit is shown in the following figure.
FPGA Design Demonstration Board
Pin Name
J1–16 CLKI
J1–18 CLKO
Function
System clock input to
XChecker Cable to be
controlled and output
on CLKO. Connects to
tiepoint J3–2.
System clock output
controlled by
XChecker Cable; used
to single-step or burst
clocks to the XC3020A.
Connects to tiepoint
J3–3.
3-23