Cmod A7 Reference Manual

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8

Pmod Connector

Pmod connecters are 2x6, right-angle, 100-mil spaced female connectors that mate with standard 2x6 pin headers.

Each 12-pin Pmod connector provides two 3.3V VCC signals (pins 6 and 12), two ground signals (pins 5 and 11), and

eight logic signals, as shown in Fig. 8.1. The VCC and Ground pins can deliver up to 1A of current, but care must be

taken not to exceed any of the power budgets of the onboard regulators of the external power supply (these are

described in the “Power Supplies” section).

Digilent produces a large collection of Pmod accessory boards that can attach to the Pmod expansion connectors

to add ready-made functions like A/Ds, D/As, motor drivers, sensors, and other functions. See

www.digilentinc.com for more information.

The Cmod A7 has one standard-type Pmod connector, and the FPGA pin connections for it are described in Table

8.1. Standard Pmod connectors are connected to the FPGA via 200-ohm series resistors. The series resistor prevent

short circuits that can occur if the user accidentally drives a signal that is supposed to be used as an input. The

downside to this added protection is that these resistors can limit the maximum switching speed of the data

signals.

Figure 8.1. Pmod diagram.

Pmod JA

Pmod Type

Standard

Pin 1

G17

Pin 2

G19

Pin 3

N18

Pin 4

L18

Pin 7

H17

Pin 8

H19

Pin 9

J19

Pin 10

K18

Table 8.1. Cmod A7 Pmod pinout.