MAX41470 datasheet(21/43 Pages) MAXIM

21 / 43 page

Maxim Integrated │ 21

www.maximintegrated.com

Evaluates: MAX41470,

MAX41473, and MAX41474

MAX4147X Evaluation Kit

The right-hand side of the

displays the content of the selected device register. At

the top of the block, a header displays the name of the

selected register (eg “STATE_CTRL1”), the “Index” or

address of the register in both decimal (“0d”) and hexa-

decimal (“0000h”) form.

The body of this section shows a table with the names of

the individual bits for the selected 8b register along with

the current value programmed into each bit or bit group.

The remaining portion of the body shows a table with the

bit indexes, the type of register (write/read), the name of

the bit or bit group, the Reset value, and a description of

the bit or bit group.

Read and Write Registers

Most of the registers in the MAX4147X are both readable

and writable. The read-only registers are RSSI (0x10),

FEI (0x11), PDF_OUT (0x12), ISR (0x13), STATE_CTRL2

(0x15), PART_NUM (0x1E), and REV_NUM (0x1F).

Writing values to a register can be accomplished by

selecting the register of interest, typing a Hex or Dec

value into the

Value field, and clicking on the Write

the register of interest and click on the

Read Register X

button.

Individual bits or bit groups can be programmed without

having to enter the full value of the register. To program

a bit or group of bits, first select the register of interest

(WUT2, 0x18 for example), next select the bit or bit group

to be changed (TSBY_TDET_RATIO as an example),

enter the binary code for the new value (0000011b), and

hit

Enter—the new value will automatically be reflected in

the

Value field and will be written to the device.

Miscellaneous Software Information

The tool bar along the top of the GUI software provides a

couple of options to the user.

File and Help Menu

Selecting

File > Exit from the tool bar will close the GUI

program. This has the same effect as clicking the

X button

in the upper-right corner of the GUI software.

Selecting

Help > About from the tool bar will display

the splash screen. This window shows the name of the

software, the revision number, a copyright notice, a link

to the Maxim website, a link to the support website, and

a checkbox to enable or disable the splash screen during

startup. Click the

OK button to close the About window.

.xml File

The register descriptions for the MAX4147X GUI are

available in an .xml file which is stored with the executable

in the application directory. The default file loaded when

the GUI is initialized is MAX4147X_Registers.XML.

This file can be edited as needed to adjust the names of

fields, provide simple indicators to the GUI user, or allow

for flexible updates to the GUI interface in the future.

Use Cases

Two Interface Modes for

Data Transmission and Control

The MAX4147X allows a great deal of flexibility when it

comes to receiving data. Typically, the fewer pins used to

interface with the device, the simpler it is to control and

transmit data.

Preset Mode

Preset mode is the simplest interface of the three options.

It relies on the part number to choose the modulation

(MAX41473 for ASK; MAX41474 for FSK) and jumper

settings (or tri-level pin connections) to configure the part

for a defined carrier frequency (See Tables 4 and 5). With

the Preset mode, the data rate and frequency deviation,

in the case of FSK modulation, need to be within expected

ranges for proper operation.

I2C Mode

The I2C interface mode allows the user to access the

internal registers of the MAX41473/74 devices, permitting

full control over the receive frequency, data rate, thresh-

olds, bandwidths, etc.

This mode only requires two digital pins to interface with

the transmitter but has a more complicated, packet-based

protocol for interacting with the device. Once configured

for I2C interfacing by connecting the I2C/PRESET pin

to logic high, the MAX41473/74 can support a 2-wire

I2C-compatible serial interface consisting of a serial-

data line (SDA) and a serial-clock line (SCL). SDA and

SCL facilitate bidirectional communication between the

MAX41473/74 and the master (microcontroller) at clock

frequencies up to 1MHz. The master device initiates a

data transfer on the bus and generates the SCL signal to

permit data transfer. The MAX41473/74 functions as an

I2C slave device that transfers and receives data to and

from the master. It is necessary to pull SDA and SCL high

with external pullup resistors via population of the R8 and

R9 resistors and the installation of JU3 1-2 and 3-4.

MAX41470 Datasheet(PDF) 21 Page - Maxim Integrated Products

MAX41470 Datasheet(HTML) 21 Page - Maxim Integrated Products

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43

Datasheet Download

Link URL