User manual

22.8.2018 Cmod S7 Reference Manual [Reference.Digilentinc]
https://reference.digilentinc.com/reference/programmable-logic/cmod-s7/reference-manual 4/12
available for download at the Cmod S7 Resource Center (https://reference.digilentinc.com/reference/programmable-logic/cmod-s7/start).
The Cmod S7 can be used with Vivado 2017.4, but WebPACK installations of this version of Vivado may not contain the device files for
the specific Spartan-7 FPGA used on the Cmod S7. See this Xilinx Answer Record
(https://www.xilinx.com/support/answers/70505.html) for more information, and for a solution.
The Cmod S7 uses a Linear Technologies LTC3569 triple output buck power regulator to generate the needed voltages for the onboard
components. It is connected as shown in Figure 1.1. The characteristics of the outputs are shown in Table 1.1.
(https://reference.digilentinc.com/_detail/reference/programmable-logic/cmod-s7/cmod-s7-power.png?id=reference%3Aprogrammable-
logic%3Acmod-s7%3Areference-manual)
Figure 1.1 Power Supply
Supply Circuits Device
Maximum
Current
3.3V FPGA User I/O, USB Controller, Flash Memory, Pmod Connector, LEDs,
Buttons
IC6:
LTC3569
1.2A
1.8V FPGA, USB Controller IC6:
LTC3569
0.6A
1.0V FPGA Core and Block RAM () IC6:
LTC3569
0.6A
Table 1.1 Power Rail Characteristics
It is possible to power the Cmod S7 from either USB or from an external power supply attached to pins 24 and 25 of the DIP headers,
labeled “VU” and “GND ()”, respectively. The required characteristics of a power source attached to either of these two options is
outlined in Table 1.1.1.
Connector Type Connector Label Min/Rec/Max Voltage
USB J5 Per USB Specification
DIP J3 (Pin 24) 4.5/5.0/5.5

Functional Description
1 Power Supplies
1.1 Power Input Options