Datasheet

0% causes the different colors to be illuminated at different intensities, allowing virtually any color
to be displayed.
8 Pmod Connectors
Pmod connectors are 2×6, right-angle, 100-mil spaced female connectors that mate with standard
2×6 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 Figure 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 or 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/D’s, D/A’s, motor drivers, sensors, and
other functions. See www.digilentinc.com for more information.
The Arty S7 has four Pmod connectors, some of which behave differently than others. Each Pmod
connector falls into one of two categories: standard or high-speed. Also, some Pmod connectors
share their connections with the inner rows of the shield connector, and should not be used at the
same time as a shield that requires those pins. Table 8.1 specifies which category each Pmod falls
into, whether it shares any pins with the shield connector, and also lists the FPGA pins they are
connected to. The following sections describe the different types of Pmods.
Figure 8.1. Pmod connector.
Pmod JA
Pmod JB
Pmod JC
Pmod JD
Pmod Type
High-Speed
High-Speed
Standard
Standard
Shared pins
–
–
IO34-IO41
IO26-IO33
Pin 1
L17
P17
U15
V15
Pin 2
L18
P18
V16
U12
Pin 3
M14
R18
U17
V13
Pin 4
N14
T18
U18
T12
Pin 7
M16
P14
U16
T13
Pin 8
M17
P15
P13
R11
Pin 9
M18
N15
R13
T11
Pin 10
N18
P16
V14
U11
Table 8.1. Arty S7 Pmod Pinout.
8.1 Standard Pmod
The standard Pmod connectors are connected to the FPGA via 200 Ohm series resistors. The
series resistors 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. If the Pmod being used does not require
high-speed access, then the standard Pmod connector should be used to help prevent damage to
the devices.