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MAX5432 Evaluation Kit
volatile memory. The bottom-left status bar of the main
window provides the USB interface circuit communica-
tion status. The bottom-right status bar indicates the
presence or absence of the MAX5432 IC. The Factory
Default button programs the volatile and nonvolatile
memory of the potentiometer to midscale position.
Software Startup
Upon starting the program, the MAX5432 EV kit soft-
ware automatically searches for the USB interface-
circuit connection, and then for the device address.
The MAX5432 EV kit enters the normal operating mode
when the USB connection is detected and has found
the device address. The nonvolatile memory wiper
position is then transferred to the volatile memory.
Since the MAX5432 does not have read capability, all
the spin boxes are set to question marks (??) and the
track bar is set to midscale. If the USB connection is
not detected, the software prompts the user to retry,
exit the program, or enter the demo mode.
Demo Mode
The MAX5432 EV kit software can enter the demo
mode, when the USB connection is not detected, by
pressing the Cancel button on the MAX5432
Evaluation Kit Interface Circuit popup window
(Figure 2). The software can also enter the demo mode
at any time using the Options | Demo Mode pulldown
menu item in the main window. When in demo mode,
all software communication to the EV kit circuit is dis-
abled; however, most of the software GUI is functional.
Demo mode allows the user to evaluate the software
without hardware connectivity. To exit demo mode,
select Options | Demo Mode from the pulldown menu.
Wiper Position
The Wiper Position track bar in the Potentiometer Control
group box can be used to change the wiper position
between the H and L end points. Use the computer mouse
or the keyboard UP and DOWN arrow keys to move the
Figure 2. MAX5432 Evaluation Kit Interface Circuit Popup Window
wiper position between the 32 position points. The wiper
position can also be changed by entering a numerical value
between 0 and 31 into the H-W Volatile or L-W Volatile
spin boxes, or by selecting the up/down buttons of these
spin boxes. A change in the Wiper Position track bar, or H-
W Volatile/L-W Volatile spin boxes will write to the volatile
memory and the wiper position is updated with the data
sent. The data in the nonvolatile memory remains
unchanged. The wiper position is shown in the H-W Volatile
and L-W Volatile spin boxes. The H-W Volatile spin box
shows the wiper position with respect to the H end point
and the L-W Volatile spin box shows the wiper position with
respect to the L end point. During EV kit power-up, the
wiper position data in the nonvolatile memory is transferred
to the volatile memory and the position of the wiper is updat-
ed. The H-W Volatile , L-W Volatile , H-W Nonvolatile , and
L-W Nonvolatile spin boxes display question marks (??)
after initializing the EV kit software because the
MAX5432 does not transmit data to the master.
Nonvolatile Programming
The H-W Nonvolatile and L-W Nonvolatile spin boxes
in the Potentiometer Control group box can be used to
program the nonvolatile memory of the digital poten-
tiometers. The nonvolatile memory can be changed by
entering a numerical value between 0 and 31 into the
H-W Nonvolatile or L-W Nonvolatile spin boxes. The
H-W Nonvolatile spin box shows the wiper position with
respect to the H end point and the L-W Nonvolatile
spin box shows the wiper position with respect to the L
end point. When writing to the nonvolatile memory, the
volatile memory and wiper position remain unchanged.
Volatile/Nonvolatile Data Transferring
The Potentiometer Control group box contains the Store
and Recall buttons that are used to transfer data from the
volatile memory to the nonvolatile memory and vice versa.
When the Store button is pressed, the data present in the
volatile memory is transferred to the nonvolatile memory.
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相关代理商/技术参数
MAX5432LETA 制造商:Maxim Integrated Products 功能描述:32-TAP NONVOLATILE I2C LINEAR D - Rail/Tube
MAX5432LETA+ 制造商:Maxim Integrated Products 功能描述:DGTL POTENTIOMETER 32POS 50KOHM SGL 8TDFN EP - Rail/Tube
MAX5432LETA+T 功能描述:数字电位计 IC 32-Tap Nonvolatile I2C Linear RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel
MAX5432LETA-T 功能描述:数字电位计 IC RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel
MAX5432META 制造商:Maxim Integrated Products 功能描述:32-TAP NONVOLATILE I2C LINEAR D - Rail/Tube
MAX5432META+ 制造商:Maxim Integrated Products 功能描述:DGTL POTENTIOMETER 32POS 50KOHM SGL 8TDFN EP - Rail/Tube
MAX5432META+T 功能描述:数字电位计 IC 32-Tap Nonvolatile I2C Linear RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel
MAX5432META-T 功能描述:数字电位计 IC RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel