Detailed Description of Software

User-Interface Panel

The program’s main window (Figure 2) is navigated by

using a mouse or a combination of the Tab and Arrow

keys. The MAX17065 EV kit software provides controls

for the following software-configurable features:

Frequency and Mode selection, ON Enables, Outputs

configuration, Faults detection, Current Limit settings,

and Manufacturer ID/Silicon Revision detection.

Changes to the controls result in a write operation that

updates the appropriate registers of the MAX17065.

A status bar is also provided at the bottom of the pro-

gram’s main window and is used to verify command

module and device connectivity. A Device Search

option is located in the Action menu bar should the user

want to switch from Demo Mode to normal operation.

Frequency Selection

The MAX17065 can be operated at either 0.6MHz or

1.2MHz. To set the desired frequency, select the

appropriate radio button in the Frequency group box.

The default frequency setting is 0.6MHz, but the EV kit

is designed for 1.2MHz. Component changes are

required when selecting different frequencies. Refer to

the MAX17065 IC data sheet for more information

regarding frequency selection.

Operating Mode

The MAX17065 can be operated in either Skip Mode or

Forced PWM. To set the desired operating mode,

select the appropriate radio button in the Mode group

box. The default operating mode is Forced PWM. Refer

to the MAX17065 IC data sheet for more information

regarding modes of operation.

ON Enables and Test

The ON2 and ON1 bits enable/disable the various out-

puts of the MAX17065, according to Table 1. To set

either bit high, check the respective ON_ checkbox in

the ON Enables group box.

Setting TEST1 and TEST0 checkboxes prevents the

VL, VH, VP, and VN outputs. In this mode, the output

can be driven by external voltage sources. Setting

either TEST_ bit to 1 in the Test group box disables the

discharge function. Refer to the MAX17065 IC data

sheet for more information regarding the test bits.

Fault Detection

The MAX17065’s Faults read-only register monitors the

OLED controller’s operating state, output, and thermal

faults. When a fault is detected, the corresponding bit is

changed from logic 0 to logic 1 and the font color is

changed to red. Refer to the MAX17065 IC data sheet

for more information regarding the Faults register.

Outputs

The MAX17065 allows for software control of the

charge-pump and negative SMPS outputs. Select the

appropriate voltages from the VL:, VH:, and VN: drop-

down lists to set the desired voltages. The default set-

tings are VL: -0.5V, VH: +5.5V, and VN: -0.5V.

Current Limit

The MAX17065 software allows the user to set cur-

rent limits for the negative and positive switching

power supplies. To set the current limits, select the

desired current limit from the IMAXN: and IMAXP:

drop-down lists in the Current Limit group box. The

default current-limit settings are IMAXN: 0.45A and

IMAXP: 0.45A.

Manufacturer ID/Silicon

Revision Detection

The ID Register group box shows the manufacturer ID

and silicon revision information of the MAX17065 IC.

This information is read upon initial start-up.

MAX17065 Evaluation Kit

4

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Figure 2. MAX17065 EV Kit Software Main Window

Table 1. ON2 and ON1 Control

ON2

ON1

VA OUTPUT

VH, VL

OUTPUTS

VP, VN

OUTPUTS

0

0

Off

Off

Off

0

1

On

On

Off

1

0

On

On

On

1

1

On

On

On