Digilent 410-247P-KIT - Manual (Page 2)

PmodCDC1 Reference Manual
www.digilentinc.com page 2 of 2
Copyright Digilent, Inc.
AD7156 will store that byte in this location and
it will increment the address pointer again. This
process will continue until the host device
asserts a Stop condition.
The PmodCDC1 has an 8-pin connector that
allows for communication via I
2
C. The I
2
C
interface standard uses two signal lines. These
are I
2 C Data and I 2 C Clock. These signals map
to the serial data (SDA) and serial clock (SCL)
respectively on the AD7156. (See Table 2)
Power Supply
You must keep any external voltage you apply
to VCC between 1.8V and 3.6V to avoid
damaging the PmodCDC1.
Standard Pmod headers on Digilent boards
provide both 3.3 V and 5.0 V power supplies
for Pmods. Make sure that the jumper next to
the Pmod header shorts to the 3V3 supply.
Register Addresses
The AD5933 data sheet has a complete table
of register addresses and is available at
www.analog.com .
Connector J1 – I2C Communications
Pin Signal Description
1, 2
SCL I2C Clock
3, 4 SDA I2C Data
5, 6 GND Power Supply Ground
7, 8 VCC Power Supply (3.3V/5V)
Table 2. Interface Connector Signal Description