MAX5393EVMINIQU+ Maxim Integrated, MAX5393EVMINIQU+ Datasheet - Page 7

• Manufacturer Part Number: MAX5393EVMINIQU+
• Description: Digital Potentiometer Development Tools MAX5393 Eval Kit
• Manufacturer: Maxim Integrated
• Series: MAX5391, MAX5393r

Specifications of MAX5393EVMINIQU+

• Rohs: yes
• Product: Evaluation Systems
• Tool Is For Evaluation Of: MAX5393
• Resistance: 50 kOhms
• Operating Supply Voltage: 1.7 V to 5.25 V
• Interface Type: 3 Wire, Serial, USB

Figure 3. Simple Low-Level 3-Wire Interface
the 3-Wire_Interface (Figure 3) utility from the main pro-
gram’s Options_|_Advanced_Users Interface menu bar.
A window is displayed that allows SPI send/receive data
operations.
On the 3-wire_ interface tab, the Connection group
box defines the hardware connections of the interface.
For the EV kit, K10 is selected from the Clock_ (SCK)_
(SCLK) drop-down list, K12 from the Data_ from_
master_ to_ slave_ (MOSI)_ (DIN) drop-down list, K11
from the Data_ from_ slave_ to_ master_ (MISO)_ (DOUT)
drop-down list, K9 from the Chip-select_ (CS)_ for_ data_
framing drop-down list, and the Use_standard_connec-
tions_ for_ high-speed_ SPI checkbox is checked (see
Figure 3).
The Configuration group box allows the user to config-
ure the logic level and data rate. For the MAX5393 EV
kit, check the Send_&_Receive_MSB_first checkbox and
verify that the CPOL=1_ (clock_ idle_ high) and CPHA=1_
(sample_ 2nd_ edge) checkboxes are unchecked (see
Figure 3).
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MAX5393 Evaluation System
The Send_ and_ Receive_ Data group box allows the
user to send data to the MAX5393. The Data_ bytes_ to_
be_ written_ edit box indicates data to be sent from the
master (microcontroller) to the device (MAX5393). Eight-
bit hexadecimal numbers should be comma delimited.
Press the Send_Now button to transmit the data from the
master to the device. Data appearing in the Data_bytes_
received edit box is data read from the device. The Data_
bytes_ received edit box in the EV kit software always
shows a default value of 0xFF since the MAX5393 does
not send data back to the master.
Note: The SPI dialog boxes accept numeric data in
hexadecimal format. Hexadecimal numbers must be
prefixed by $ or 0x. Figure 3 shows a simple SPI write-
byte operation using the included 3-wire interface diag-
nostics tool. In this example, the software is sending
command 0x11 (write to potentiometers A and B) and
data 0x7F. The data sequence sets potentiometer A and
B wiper positions to 127.