Pmod Connector - Digilent Cmod S7 Reference Manual

22.8.2018
(https://reference.digilentinc.com/_media/cmod_a7/cmoda7_b_analog.png)
Figure 7.2.1 Analog Input Circuit
The XADC core within the Spartan-7 is a dual-channel 12-bit analog-to-digital converter capable of operating at 1 MSPS. Either channel
can be driven by either of the two auxiliary analog inputs to the DIP pins. The XADC core is controlled and accessed from a user design
via the Dynamic Reconfiguration port (DRP). The DRP also provides access to a temperature sensor that is internal to the FPGA. For
more information on using the XADC core, refer to
(https://www.xilinx.com/support/documentation/user_guides/ug480_7Series_XADC.pdf)
Programmable SoC XADC Dual 12-Bit 1 MSPS Analog-to-Digital Converter". A demo that uses the XADC core is available on the
Cmod S7 Resource Center

8 Pmod Connector

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 sown in
Figure 8.1. The VCC () and Ground pins can deliver up to 200mA of current, but care must be taken not to exceed any of the power
budgets of the onboard regulator or the external power supply (described in the Power Supplies section).
(https://reference.digilentinc.com/_detail/basys3-pmod_connector.png?id=reference%3Aprogrammable-logic%3Acmod-s7%3Areference-manual)
Figure 8.1 Pmod Diagram
Digilent provides a large collection of Pmod accessory boards that can attach to Pmod expansion connectors to add ready-made
functions like A/D ()'s, D/A ()'s, motor drivers, sensors, and other functions. See
more information.
The Cmod S7 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 resistors prevent short circuits that can occur if a 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.
Pmod Type
Pin 1
Pin 2
Pin 3
Pin 4
Pin 7
https://reference.digilentinc.com/reference/programmable-logic/cmod-s7/reference-manual
Cmod S7 Reference Manual [Reference.Digilentinc]

(https://reference.digilentinc.com/reference/programmable-logic/cmod-s7/start)
Xilinx UG480
, titled "7 Series FPGAs and Zynq-7000 All

Pmod JA
Standard
J2
H2
H4
F3
H3
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