User guide

ManualsBrandsDigilent ManualsHardware410-134P-KIT

Nexys2 Reference Manual

Digilent

www.digilentinc.com

Peripheral Connectors

The Nexys2 board provides four two-row 6-pin Pmod connectors that together can accommodate up

to 8 Pmods. The four 12-pin connectors each have 8 data signals, two GND pins, and two Vdd pins.

All data signals include short circuit protection resistors and ESD protection Diodes. A jumper block

adjacent to each Pmod connector can connect the Pmod’s Vdd signal to the Nexys2 board’s 3.3V

supply or to the input power bus (VU). If the jumper is set to VU and USB power is driving the main

power bus, care should be taken to ensure no more than 200mA is consumed by the Pmod. Further, if

the jumper is set to VU, a voltage source connected to the Pmod can drive the main power bus of the

Nexys2 board, so care should be taken to avoid connecting conflicting power supplies.

The Pmod connectors are labeled JA (nearest the power jack), JB, JC, and JD (nearest the expansion

connector). Pinouts for the Pmod connectors are provided in the table below.

More than 30 low-cost are available for attachment to these connectors. Pmods can either be

attached directly, or by using a small cable. Available Pmods include A/D and D/A converters, motor

drivers, speaker amplifiers, distance measuring devices, etc. Please see www.digilentinc.com for

more information.

Table 3: Nexys2 Pmod Connector Pin Assignments

Pmod JA Pmod JB Pmod JC Pmod JD

JA1:

L15 JA7:

K13 JB1:

M13 JB7:

P17 JC1:

G15 JC7:

H15 JD1:

J13 JD7:

K14

JA2:

K12 JA8:

L16 JB2:

R18 JB8:

R16 JC2:

J16 JC8:

F14 JD2:

M18 JD8:

K15

JA3:

L17 JA9:

M14 JB3:

R15 JB9:

T18 JC3:

G13 JC9:

G16 JD3:

N18 JD9:

J15

JA4:

M15 JA10:

M16 JB4:

T17 JB10:

U18 JC4:

H16 JC10:

J12 JD4:;

P18 JD10:

J14

Notes:

shared with LD3

Spartan 3E

FPGA

JA1

JA2

JA3

JA4

ESD protection

diodes

Resistors for short-

circuit protection

Power supply

jumper

3.3V

JA5

JA6

JA7

JA8

Figure 23: Nexys2 Pmod connector circuits