MAX3100EVKIT+_技术文档

19-4083; Rev 0; 3/08

MAX3100 Evaluation Kit

Evluates:MAX310

General Description

Features

The MAX3100 evaluation kit (EV kit) provides a proven

design to evaluate the MAX3100 SPI™/MICROWIRE™

-compatible universal asynchronous receiver transmit-

ter (UART). The EV kit also includes Windows 2000/XP/

Vista^®-compatible software that provides a simple

graphical user interface (GUI) for exercising the fea-

tures of the MAX3100.

♦ SPI/MICROWIRE-Compatible µC Interface

♦ On-Board µC Provides Flexible Configuration

Possibilities

♦ Windows 2000/XP/Vista (32-Bit)-Compatible

Software

♦ Lead-Free and RoHS-Compliant

♦ Proven PCB Layout

The MAX3100 uses the SPI/MICROWIRE interface for

communication with the on-board MAXQ2000 micro-

controller (µC). The on-board DIP switches and

momentary pushbutton switches are used to configure

the MAX3100 internal registers.

♦ Fully Assembled and Tested

The EV kit can be connected to a PC serial port directly

or through a straight-through extension cable. The PC

is a data terminal equipment (DTE) device and the EV

kit is a data communications equipment (DCE) device.

Ordering Information

After the EV kit and the PC serial port are configured

properly, the PC can send characters to the MAX3100.

The on-board MAXQ2000 µC reads the received data

from the MAX3100 and displays the characters on the on-

board seven-segment LED or sends back data to the PC.

PART

TYPE

MAX3100EVKIT+

EV Kit

+Denotes lead-free and RoHS-compliant.

Other switches, jumpers, and pads are provided to

modify the board to the numerous configurations avail-

able for the MAX3100.

Component List

DESIGNATION QTY

DESCRIPTION

DESIGNATION QTY

DESCRIPTION

DB-9 female R/A 0.318in D-SUB

serial port connector

0.1µF 10ꢀ, 16V X7R ceramic

12 capacitors (0603)

J1

J2

J3

1

0

C1–C5, C8, C9,

C12–C16

Murata GRM188R71C104K

1 x 5 header

Not installed, vertical 2 x 5-pin

header

39pF 5ꢀ, 50V C0G ceramic

capacitors (0603)

Murata GRM1885C1H390J

C6, C7

2

1

JU1–JU4

JU5

4

1

2-pin headers

2 x 8 header

10pF 5ꢀ, 50V C0G ceramic

capacitors (0603)

Murata GRM1885C1H100J

C10, C11

C17

150Ω 5ꢀ, 8-element chip resistor

network (0603 x 8)

R1

1

R2, R3, R4

R5, R6, R7

SW1–SW4

3

4

10kΩ 5ꢀ resistors (0603)

150Ω 5ꢀ resistors (0603)

Momentary pushbutton switches

10µF 10ꢀ, 10V X5R ceramic

capacitor (0805)

Murata GRM21BR61A106K

8-position DIP switch, top-slide

surface mount

Super red, 7-segment, common-

cathode LED

SW5

SW6

1

D1

1

3

D2, D3, D4

Green LEDs (0603)

12-position DIP switch, top-slide

surface mount

SPI is a trademark of Motorola, Inc.

MICROWIRE is a trademark of National Semiconductor Corp.

Windows Vista is a registered trademark of Microsoft Corp.

________________________________________________________________ Maxim Integrated Products

1

For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,

or visit Maxim’s website at www.maxim-ic.com.

MAX3100 Evaluation Kit

Component List (continued)

Quick Start

Required Equipment

DESIGNATION QTY

DESCRIPTION

Before beginning, the following equipment is needed:

SPI/MICROWIRE-compatible UART

(16 QSOP)

Maxim MAX3100CEE+

•

MAX3100 EV kit (RS-232 serial cable included)

3.3V, 200mA DC power supply

U1

1

A user-supplied Windows 2000/XP/Vista PC with a

spare serial RS-232 port

RS-232 transceiver (16 TSSOP)

Maxim MAX3232ECUE+

U2

U3

1

OR

Microcontroller (68 QFN-EP*)

Maxim MAXQ2000-RAX+

•

A user-supplied Windows 2000/XP/Vista PC with a spare

USB port and Maxim’s USBTO232+ converter board

Digital temperature sensor

(6 TDFN-EP*)

Maxim MAX6626PMTT+

Note: In the following sections, software-related items are

identified by bolding. Text in bold refers to items directly

from the EV kit software. Text in bold and underlined

refers to items from the Windows operating system.

U4

1

LDO regulator (5 SC70)

Maxim MAX8511EXK25+

U5

U6

Y1

1

Procedure

The MAX3100 EV kit is fully assembled and tested.

Follow the steps below to verify board operation.

Caution: Do not turn on the power supply until all

connections are completed.

Octal buffer (20 TSSOP)

3.6864MHz crystal

ECS ECS-36-20-5PX-TR

Evluates:MAX310

16MHz crystal

1) Visit www.maxim-ic.com/evkitsoftware to download

the latest version of the EV kit software,

3100Rxx.ZIP. Save the EV kit software to a tempo-

rary folder and uncompress the ZIP file.

Hong Kong X’tals

SSM1600000E18FAF

Y2

1

—

12 Shunts

DB9 male to DB9 female serial

straight-through cable

2) Install the EV kit software on your computer by run-

ning the INSTALL.EXE program inside the temporary

folder. The program files are copied and icons are

created in the Windows Start | Programs menu.

1

—

PCB: MAX3100 Evaluation Kit+

*EP = Exposed pad.

3) Verify that all jumpers (JU1–JU5) are in their default

positions, as shown in Table 1 (JU1, JU2: Open;

JU3, JU4, JU5: 1-2).

Component Suppliers

SUPPLIER

PHONE

WEBSITE

4) Verify that both DIP switches (SW5, SW6) are in

their default positions, as shown in Tables 2 and 3

(all positions On).

ECS, Inc.

International

800-237-1401 www.ecsxtal.com

Hong Kong

X’tals Ltd.

5) Connect the EV kit to the PC using the RS-232 serial

cable.

+852-3511-2388 www.hongkongcrystal.com

Murata

6) Connect the 3.3V power supply to the +3.3V and

GND pads or headers on the EV kit board.

Electronics North 770-436-1300 www.murata-northamerica.com

America, Inc.

7) Turn on the 3.3V power supply. Verify that all seg-

ments of D1 are lit up, D2, D3, D4 are off.

Note: Indicate that you are using the MAX3100 when contact-

ing these component suppliers.

8) Start the MAX3100 EV kit software by opening its

icon in the Start | Programs menu. The EV kit soft-

ware main window appears, as shown in Figure 1.

MAX3100 EV Kit Files

DESCRIPTION

Application program

FILE

9) Press the SW1 momentary pushbutton switch on the

EV kit board. The µC reads SW5 and SW6 DIP

switch states and configures MAX3100 through a

write-configuration command. Refer to the MAX3100

IC data sheet for details.

MAX3100.EXE

INSTALL.EXE

UNINST.INI

Installs the EV kit files on your computer

Uninstalls the EV kit software

2

_______________________________________________________________________________________

MAX3100 Evaluation Kit

Evluates:MAX310

Note: The EV kit sets the following MAX3100 register

bits to a fixed logic because the µC firmware relies on

these settings to function properly; a user cannot

change these settings:

Note: Many PCs do not support 230.4kbps baud rate. If

this is the case, select a lower baud rate on the GUI

and open the port. Change the B3–B0 settings on the

EV kit board and press SW1 to configure the MAX3100

accordingly.

•

FEN = 0 (FIFO Enable. Enables the receive FIFO

when FEN = 0. When FEN = 1, FIFO is disabled.)

11) Click the up or down arrow on the spin box. The PC

sends a single ASCII character to the EV kit. Verify that

the seven-segment LED follows the GUI selections.

TM = 1 (Mask for T bit. IRQ is asserted if TM = 1

and T = 1.)

RM = 1 (Mask for R bit. IRQ is asserted if RM = 1

and R = 1.)

Detailed Description of Software

The EV kit is only designed to demonstrate the features

of the MAX3100. No robust error checking or flow-

control algorithms are implemented. All data is in raw

binary format without coding and decoding. A user

should connect an oscilloscope to monitor the wave-

forms on the signal lines to better understand the data

transactions.

PM = 1 (Mask for Pr bit. IRQ is asserted if PM = 1

and Pr = 1.)

RAM = 1 (Mask for RA/FE bit. IRQ is asserted if

RAM = 1 and RA/FE = 1.)

10) On the software GUI, accept the default settings for

the PC UART. Click the Select Port drop-down list to

select the COM port that connects to the EV kit.

Press the Open button to open and configure the PC

COM port setting as defined in the PC UART Setting

group box. Check the status bar at the bottom of the

GUI to verify that the port is opened successfully.

The software main window includes seven group

boxes, as shown in Figure 1.

Figure 1. Software Main Window

_______________________________________________________________________________________

3

MAX3100 Evaluation Kit

low. The µC should move the data from the first-in-first-

out buffer (FIFO) quickly to avoid a buffer overflow.

After the µC receives an end-of-a-message byte, the

µC displays the characters one after another, with

approximately 0.5s delay between each character.

Setting the PC UART

The PC UART Setting group box configures the PC

serial port that communicates with the EV kit to the set-

ting in the PC UART Setting group box. After the Open

button is pressed and the port is opened successfully,

the PC serial port settings cannot be changed until the

port is closed. To change the PC serial port setting or

release the serial ports, close the PC serial port by

pressing the Close button.

Sending a Read Temp Sensor

Command to the EV Kit

Press the Read Temp Sensor button inside the PC

Sends a Read Temp Sensor Command to EV Kit

group box to send a command (0x03) from the PC to the

EV kit. When the µC receives and parses the meaning of

the command, the µC gets temperature data (grouped in

2 bytes) from the on-board digital temperature sensor.

The µC then writes the 2 bytes to the MAX3100’s write-

data register. Lastly, the PC receives the 2 bytes of data

and displays the corresponding temperature.

For the PC serial port to communicate with the EV kit,

both the PC and EV kit serial ports should be config-

ured exactly the same. Set the SW5 and SW6 DIP

switches on the EV kit board appropriately and then

press and release SW1. The on-board µC reads DIP

switch on/off states and writes a 16-bit word to config-

ure the MAX3100.

Reading the MAX3100

Configuration Register

Check the Auto Read Every 1 Second checkbox to

monitor the temperature continuously. Place the tip of

your finger on top of U4 to change the temperature.

Press the Read Conf. Reg. button inside the PC Sends

a Read Configuration Register Command to EV Kit

group box to send a command (0x07) from the PC to

the EV kit. When the µC receives and parses the mean-

ing of the command, the µC reads the MAX3100 config-

uration register and groups the 14 register bits into 2

bytes. The µC then writes the 2 bytes to the MAX3100’s

write-data register. The PC receives the 2 bytes of data

and displays the corresponding configuration-register

bits on the GUI.

Evluates:MAX310

Sending a Read DIP Switch

States Command to the EV Kit

Press the Read Switch States button inside the PC

Sends a Read DIP Switch States Command to EV Kit

group box to send a command (0x04) from the PC to

the EV kit. When the IC receives and parses the mean-

ing of the command, the µC gets DIP-switch data

(grouped in 3 bytes). The µC then writes the 3 bytes to

the MAX3100’s write-data register. The PC receives the

3 bytes of data and displays the corresponding switch

states on the GUI.

Sending One ASCII

Character to the EV Kit

The PC Sends One ASCII Character to EV Kit group

box allows a user to select an ASCII character and send

it to the EV kit. Depending on the UART frame length,

the panel on the right displays the 7-bit or 8-bit binary

digits of the ASCII character. The PC adds start, stop,

and parity bits according to the current UART settings.

Check the Auto Read Every 1 Second checkbox to

monitor the switch on/off states. Use the tip of a pen to

change the switch positions.

Do not press SW1 unintentionally. Pressing SW1 reconfi-

gures the MAX3100 from the current DIP-switch settings.

When the MAX3100 receives the character, it generates

an interrupt request to the µC by pulling the IRQ line

low. The µC moves the data from the MAX3100 and dis-

plays the single digit on the seven-segment LED.

PC Waits for SW2 or SW3

to Be Pressed on EV Kit

Press the Start Receiving Data button inside the PC

Waits for SW2 or SW3 to be Pressed on EV Kit group

box to prepare the software GUI for receiving a 0x05 or

0x06 byte from the EV kit. Press SW2 to send 0x05 or

SW3 to send 0x06 to the PC. Press the Stop Receiving

Data button to stop the PC from listening on the opened

port. Do not press SW2 or SW3 on the EV kit if the PC is

not expecting to receive data. For example, pressing

SW2 or SW3 after the Stop Receiving Data button has

been pressed corrupts other receiving operations (e.g.,

Read Temp Sensor or Read Switch States).

Sending a Group of ASCII

Characters to the EV Kit

The PC Sends a Group of Characters to EV Kit group

box allows a user to type 50 characters (max) in the

memo box and sends them to the EV kit. The format of

the packet sent to the EV kit is as follows:

[Message Header (0x01)], [ASCII characters],

[End of message (0x02)]

When the MAX3100 receives the characters, it gener-

ates interrupt requests to the µC by pulling the IRQ line

4

_______________________________________________________________________________________

MAX3100 Evaluation Kit

Evluates:MAX310

MAX3100 Baud Rate Generation

Bits B3–B0 in the MAX3100 write-configuration register

determine the baud-rate divisor (BRD), which divides

the X1 oscillator frequency. The MAX3100 internal oscil-

lator operates with either a 1.8432MHz or a 3.6864MHz

crystal, or is driven at X1 with a 45ꢀ to 55ꢀ duty-cycle

square wave. The MAX3100 IC data sheet shows BRDs

for given input codes, as well as the baud rate for

1.8432MHz and 3.684MHz crystals. The generator’s

clock is 16 times the baud rate.

Detailed Description of Hardware

The MAX3100 EV kit uses the MAXQ2000-RAX as a

host µC to communicate with the MAX3100 through the

SPI interface. The µC converts received characters to a

seven-segment LED display. The µC also implements a

2

master I C-compatible interface to communicate with

the on-board MAX6626 temperature sensor.

The EV kit has a MAX3232 RS-232 transceiver to facili-

tate communication with a PC.

The EV kit is designed as a DCE device. The J1 female

DB9 connector pin functions are shown in Figure 2. EV

kit TX line is connected to PC RX line. EV kit RX line is

connected to PC TX line. EV kit RTS line is connected to

PC CTS line. EV kit CTS line is connected to PC RTS line.

On the EV kit board, a 3.684MHz crystal is installed. A

user can replace it with a 1.8432MHz crystal or remove

Y1 and apply an external square wave on the EXTERNAL

CLOCK pad.

A user should first set B3–B0 bits to the desired values

on SW6 and then press and release SW1 to configure

the MAX3100 BRD.

The data communication between the EV kit and the PC

only requires TX and RX lines.

The logic of the RTS line (J2, pin 4) on the EV kit is con-

trolled by the MAX3100’s RTS configuration bit. RTS = 1

sets the RTS line to logic 0. RTS = 0 sets the RTS line to

logic 1. The logic of the CTS line (J2, pin 5) on the EV

kit is controlled by the PC’s hardware flow control

(MAX3100’s CTS = 0, D3 = On; MAX3100’s CTS = 1,

D3 = Off).

Hardware Reset

Press SW4 on the EV kit to reset the µC and the

MAX3100 to its initial power-on-reset (POR) state.

Jumper and Switch Settings

See Tables 1, 2, and 3 for a description of the EV kit

jumpers and switch settings.

Figure 2. EV Kit J1 Female DB9 Connector Pin Functions

_______________________________________________________________________________________

5

MAX3100 Evaluation Kit

Logic Loopback Test

Remove the shunts on JU3 and JU4 and place them on

pins 1-2 and 4-5 of J2, respectively. Press SW2 on the

EV kit board to send single-byte 0x05 on the TX line,

which is looped back on the RX line. The µC receives

this byte from the MAX3100 and displays it on the

seven-segment LED.

RS-232 Loopback Test

Disconnect the RS-232 serial cable from the EV kit. Place

the shunts of JU1–JU4 in the 1-2 position. Press SW2 to

send single-byte 0x05 on the TX line. The byte gets

transmitted out of the MAX3232’s transmitter line and

loops back to the MAX3232’s receiver line, as well as the

MAX3100’s RX line. The µC receives this byte from

the MAX3100 and displays it on the seven-segment LED.

Press SW3 to send single-byte 0x06 on the TX line,

which is looped back on the RX line. The µC receives

this byte and displays it on the seven-segment LED.

Press SW3 to send single-byte 0x06 on the TX line. The

byte gets transmitted out of the MAX3232’s transmitter

line and loops back to the MAX3232’s receiver line as

well as the MAX3100’s RX line. The µC receives this

byte from the MAX3100 and displays it on the LED.

During the logic loopback test, RTS is looped back to

CTS.

During the RS-232 loopback test, the RTS line is looped

back to the CTS line.

Table 1. MAX3100 EV Kit Jumper Descriptions (JU1–JU5)

JUMPER

SHUNT POSITION

DESCRIPTION

Open*

1-2

Normal operation

JU1

Evluates:MAX310

Short RS-232 TX and RX lines for EV kit RS-232 loopback test

Normal operation

Open*

1-2

JU2

JU3

JU4

Short RS-232 RTS and CTS lines for EV kit RS-232 loopback test

Normal operation

1-2*

Open

1-2*

Open to isolate MAX3100 logic RX line from RS-232 receiver line

Normal operation

Open

1-2*

Open to isolate MAX3100 CTS logic line from RS-232 receiver line

MAX3100 connected to the on-board µC

MAX3100 connected to an external µC

JU5

Open

*Default position.

Table 2. MAX3100 EV Kit DIP Switch SW5 Descriptions

SWITCH

POSITION

DIP SWITCH STATES

MAX3100 CONFIGURATION BITS

On*

SW5.1 = 0

N/A

SW5-1

Off

On*

Off

On*

Off

On*

Off

On*

Off

On*

Off

On*

Off

SW5.1 = 1

SW5.2 = 0

SW5.2 = 1

SW5.3 = 0

SW5.3 = 1

SW5.4 = 0

SW5.4 = 1

SW5.5 = 0

SW5.5 = 1

SW5.6 = 0

SW5.6 = 1

SW5.7 = 0

SW5.7 = 1

SW5.8 = 0

N/A

SHDNi = 0

SHDNi = 1

N/A

SW5-2

SW5-3

SW5-4

SW5-5

SW5-6

SW5-7

N/A

IR = 0

IR = 1

ST = 0

On*

SW5-8

Off

SW5.8 = 1

ST = 1

*Default position.

6

_______________________________________________________________________________________

MAX3100 Evaluation Kit

Evluates:MAX310

Table 3. MAX3100 EV Kit DIP Switch SW6 Descriptions

SWITCH

POSITION

On*

Off

DIP SWITCH STATES

SW6.1 = 0

SW6.1 = 1

SW6.2 = 0

SW6.2 = 1

SW6.3 = 0

SW6.3 = 1

SW6.4 = 0

SW6.4 = 1

SW6.5 = 0

SW6.5 = 1

SW6.6 = 0

SW6.6 = 1

SW6.7 = 0

SW6.7 = 1

SW6.8 = 0

SW6.8 = 1

SW6.9 = 0

SW6.9 = 1

SW6.10 = 0

SW6.10 = 1

SW6.11 = 0

SW6.11 = 1

SW6.12 = 0

SW6.12 = 1

MAX3100 CONFIGURATION BITS

PE = 0

PE = 1

L = 0

SW6-1

On*

Off

SW6-2

SW6-3

SW6-4

SW6-5

SW6-6

SW6-7

SW6-8

SW6-9

SW6-10

SW6-11

L = 1

On*

Off

N/A

On*

Off

B3 = 0

B3 = 1

B2 = 0

B2 = 1

B1 = 0

B1 = 1

B0 = 0

B0 = 1

N/A

On*

Off

On*

Off

On*

Off

On*

Off

N/A

On*

Off

TE = 0

TE = 1

RTS = 0

RTS = 1

Pt = 0

Pt = 1

N/A

On*

Off

On*

Off

On*

Off

SW6-12

N/A

*Default position.

_______________________________________________________________________________________

7

MAX3100 Evaluation Kit

Evluates:MAX310

Figure 3a. MAX3100 EV Kit Schematic (Sheet 1 of 2)

8

_______________________________________________________________________________________

MAX3100 Evaluation Kit

Evluates:MAX310

Figure 3b. MAX3100 EV Kit Schematic (Sheet 2 of 2)

_______________________________________________________________________________________

9

MAX3100 Evaluation Kit

Evluates:MAX310

Figure 4. MAX3100 EV Kit Component Placement Guide—Component Side

10 ______________________________________________________________________________________

MAX3100 Evaluation Kit

Evluates:MAX310

Figure 5. MAX3100 EV Kit PCB Layout—Component Side

______________________________________________________________________________________ 11

MAX3100 Evaluation Kit

Evluates:MAX310

Figure 6. MAX3100 EV Kit PCB Layout—Solder Side

Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are

implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.

12 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

is a registered trademark of Maxim Integrated Products, Inc.


型号：	MAX3100EVKIT+
厂家：	MAXIM INTEGRATED PRODUCTS
描述：	Fully Assembled and Tested
文件：	总12页 (文件大小：388K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

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