Datasheet

LM8335 GUI

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The LM8335EVM GUI provides user access and LM8335 self-test access.

5.1 User Access Tab

The User Access tab (refer to Figure 4) is partitioned into 4 sections:

1. Control Access: this section establishes USB communication to the LM8335EVM.

2. VIO Control: this section is used set the LM8335 ADR and CFG pin starts, turn VIO on, turn VIO off,

pulse VIO and provides the VIO and 1.8V status indicators.

3. LM8335 Register Access: this section is used to access the LM8335 registers 4).

4. MIPI RFFE Register Access: this section can be used to access an external MIPI RFFE device.

The normal sequence to access the LM8335EVM is:

1. Click the Open button and verify the USB interface was successfully established.

2. Select the desired state of the ADR and CFG inputs (no check = low, check = high).

• Note: the state of the ADR input automatically sets the Slave Addr field in the LM8335 Register

Access section of the LM8335EVM GUI.

3. Click the VIO ON checkbox.

4. Perform the desired register write/read operation using the Register Name & Write Data dialog along

with the Reg Write and Reg Read buttons.

The MIPI RFFE Register Write and Read access is performed as:

1. The LM8335 register is selected via the Register Name select box in the LM8335 Register Access

section of the LM8335EVM GUI.

2. Clicking the Reg Write button will perform a single register write to the selected Register Name with the

data contained in the Write Data box.

3. Clicking the Reg Read button will perform a single register read from the selected Register Name and

place the value in the Read Data status box.

The MIPI RFFE Extended Register Write and Read access is performed as:

1. Clicking the Extended Write button will write the data contained in the text line adjacent to the

Extended Write button starting at the selected Register Name address. (Note the data entered in the

text line is hexadecimal format with a single space between bytes as illustrated by the default data

pattern: 00 00 FF FF FF 55).

2. When performing the Extended Read command the number of bytes needs to be entered in the

Extended Read Byte Count field prior to clicking the Extended Read button. The data is read starting at

the address indicated by the Register Name dialog and is placed in the text line adjacent to the

Extended Read button.

The MIPI RFFE access to an external MIPI RFFE device is performed in a similar manner using the MIPI

RFFE Register Access section of the LM8335EVM GUI.

AN-2298 LM8335 Evaluation Module (EVM) SNVU189A–October 2012–Revised May 2013

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