MAX9670EVKIT+ - Maxim Integrated

Evaluates: MAX9670

MAX9670 Evaluation Kit

________________________________________________________________

Maxim Integrated Products

19-4703; Rev 0; 7/09

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.

General Description

The MAX9670 evaluation kit (EV kit) is an assembled

and tested PCB used to evaluate the MAX9670 dual

SCART audio/video switch matrix. It routes audio,

video, and control signals between a set-top box

decoder chip and the VCR/TV SCART connectors. The

on-board microcontroller, which is connected to the PC

through the universal serial bus (USB) port, acts as the

I2C master.

The EV kit also includes Windows®2000-, Windows

XP®-, and Windows Vista®-compatible software that

provides a simple user interface for exercising the

MAX9670 features. The program is menu driven and

offers a graphical user interface (GUI) complete with

control buttons and status displays. The EV kit comes

with the MAX9670CTL+ installed.

Features

♦Windows 2000-, Windows XP-, and Windows Vista-

(32-Bit)-Compatible Software

♦VCR/TV SCART Connectors

♦On-Board Microcontroller to Generate I2C

Commands

♦Easy-to-Use, Menu-Driven Software

♦USB-PC Connection (Cable Included)

Component List

Ordering Information

PART TYPE

MAX9670EVKIT+ EV Kit

Windows, Windows XP, and Windows Vista are registered trademarks of Microsoft Corp.

Denotes lead(Pb)-free and RoHS compliant.

DESIGNATION QTY DESCRIPTION

C1, C12, C14,

C55, C56 5

10µF ±10%, 16V X5R ceramic

capacitors (0805)

KEMET C0805C106K4PACTU

C2, C3 2

22pF ±5%, 50V C0G ceramic

capacitors (0603)

Murata GRM1885C1H220J

C4 1

0.033µF ±10%, 16V X5R ceramic

capacitor (0603)

Taiyo Yuden EMK107BJ333KA

C5–C10, C17,

C18, C21–C38,

C41–C50, C53,

C59–C64,

C66–C69

0.1µF ±10%, 16V X7R ceramic

capacitors (0603)

TDK C1608X7R1C104K

C11, C13, C39,

C40, C57 5

1µF ±10%, 16V X5R ceramic

capacitors (0603)

TDK C1608X5R1C105K

C15, C16 2

10pF ±5%, 50V C0G ceramic

capacitors (0603)

Murata GRM1885C1H100J

C19, C20, C51,

C52 4

1µF ±10%, 16V X7R ceramic

capacitors (0805)

TDK C2012X7R1C105K

DESIGNATION QTY DESCRIPTION

C54, C58 2

0.47µF ±10%, 16V X7R ceramic

capacitors (0603)

Murata GRM188R71C474K

C65 0 Not installed, capacitor (0603)

D1–D20 20

Dual 100V, 200mA diodes

(3 SOT23)

Central Semi CMPD7000 LEAD

FREE

D21 0 Not installed, diode (3 SOT23)

ENC_B_IN,

ENC_C_IN,

ENC_G_IN,

ENC_R/C_IN,

ENC_Y_IN,

E N C_Y /CV BS _IN ,

VCR_R/C_IN

775Ω BNC female jacks, 4-pin,

0.250in spacing (top mount)

H1 0 Not installed, 2 x 5-pin header

JU1 1 5-pin header

JU2–JU7 6 3-pin headers

L1 1 Ferrite bead (0603)

TDK MMZ1608R301A

P1 1 USB type-B right-angle PC-mount

receptacle

Evaluates: MAX9670

MAX9670 Evaluation Kit

2 _______________________________________________________________________________________

Component List (continued)

DESIGNATION QTY DESCRIPTION

P2, P3 2 SCART connectors (side-entry PCB

mount)

P4 1 RCA phono jack (side-entry PCB

mount), white

P5 1 RCA phono jack (side-entry PCB

mount), red

R1, R2 2 27Ω ±5% resistors (0603)

R3, R31, R32,

R33 4 1.5kΩ ±5% resistors (0603)

R4 1 470Ω ±5% resistor (0603)

R5 1 2.2kΩ ±5% resistor (0603)

R6 1 10kΩ ±5% resistor (0603)

R7 1 169kΩ ±1% resistor (0603)

R8 1 100kΩ ±1% resistor (0603)

R9–R13 0 Not installed, resistors—shorted by

PCB trace (0402)

R14, R17,

R20–R30,

R34–R55, R68

36 75Ω ±5% resistors (0603)

R15, R18 2 7.68kΩ ±1% resistors (0603)

R16, R19 2 2.55kΩ ±1% resistors (0603)

R56, R58 2 6.65kΩ ±1% resistors (0603)

R57, R59 2 4.53kΩ ±1% resistors (0603)

R60, R61 2 5.60kΩ ±1% resistors (0603)

R62–R67 0 Not installed, resistors—shorted by

PCB trace (0603)

DESIGNATION QTY DESCRIPTION

U1 1

Dual SCART audio/video switch

matrix (40 TQFN-EP*)

Maxim MAX9670CTL+

U2 1 Microcontroller (68 QFN-EP*)

Maxim MAXQ2000-RAX+

U3 1 LDO regulator (5 SC70)

Maxim MAX8511EXK25+

U4 1

Adjustable output LDO regulator

(5 SC70)

Maxim MAX8512EXK+

U5 1 UART-to-USB converter

(32 TQFP-L)

U6 1 93C 46A typ e 3- w i r e E E P ROM ( 8 S O )

Y1 1

16MHz crystal (HCM49)

Hong Kong X’tals

SSM16000N1HK188F0-0

Y2 1

6MHz crystal (HCM49)

Hong Kong X’tals

SSL60000N1HK188F0-0

— 7 Shunts

— 1 USB high-speed A-to-B cables, 6ft

— 1 PCB: MAX9670 EVALUATION KIT+

Component Suppliers

SUPPLIER PHONE WEBSITE

Central Semiconductor Corp. 631-435-1110 www.centralsemi.com

Hong Kong X’tals, Ltd. 852-35112388 www.hongkongcrystal.com

KEMET Corp. 864-963-6300 www.kemet.com

Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com

Taiyo Yuden 800-348-2496 www.t-yuden.com

TDK Corp. 847-803-6100 www.component.tdk.com

*EP = Exposed pad.

Note: Indicate that you are using the MAX9670 when contacting these component suppliers.

Evaluates: MAX9670

MAX9670 Evaluation Kit

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Quick Start

Recommended Equipment

• MAX9670 EV kit (USB cable included)

• User-supplied Windows 2000, Windows XP, or

Windows Vista PC with a spare USB port

• 12V/100mA DC power supply (V12)

• 3.3V/250mA DC power supply (VVID)

• 3.3V/100mA DC power supply (VAUD)

• Two DVD players with S-video, composite, or RGB

outputs

• S-video to BNC Y connector

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.

Procedure

The MAX9670 EV kit is fully assembled and tested. Follow

the steps below to verify board operation. Caution: Do

not turn on power supplies until all connections are

completed.

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

load the latest version of the EV kit software,

9670Rxx.ZIP. Save the EV kit software to a tempo-

rary folder and uncompress the ZIP file.

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

ning the INSTALL.EXE program inside the tempo-

rary folder. The program files are copied and icons

are created in the Windows Start | Programs

menu.

3) Verify that all jumpers (JU1–JU7) are in their default

positions, as shown in Tables 1 and 2. Do not turn

on the power until all connections are completed.

4) Connect the 12V/100mA DC power supply to the

V12 and the V12GND pads on the MAX9670 EV kit

board.

5) Connect the 3.3V/250mA DC power supply to the

VVID and the GNDVID pads on the MAX9670 EV kit

board.

6) Connect the 3.3V/100mA DC power supply to the

VAUD and the GNDAUD pads on the MAX9670 EV

kit board.

7) Connect the GNDVID and GNDAUD pads together

at the board.

8) Connect the V12GND and GNDAUD pads together

at the board.

9) Connect the DIGGND and GNDAUD pads together

at the board.

10) Connect the first DVD player output to the appropri-

ate ENC input(s).

11) Connect the second DVD player to the VCR SCART

(P2) connector.

12) Connect a TV to the TV SCART (P3) connector.

13) Connect the USB cable from the PC to the EV kit

board. A New Hardware Found windows pops up

when installing the USB driver for the first time. If

you do not see a window that is similar to the one

described above after 30s, remove the USB cable

from the board and reconnect it. Administrator privi-

leges are required to install the USB device driver

on Windows.

14) Follow the directions of the Add New Hardware

Wizard to install the USB device driver. Choose the

Search for the best driver for your device option.

Specify the location of the device driver to be

C:\Program Files\MAX9670 (default installation

directory) using the Browse button. During device

driver installation, Windows may show a warning

message indicating that the device driver Maxim

uses does not contain a digital signature. This is not

an error condition and it is safe to proceed with

installation. Refer to the USB_Driver_Help.PDF doc-

ument included with the software for additional

information.

15) Turn on the power supplies.

16) Start the EV kit software by opening its icon in the

Start | Programs menu. The EV kit software main

window appears, as shown in Figure 1. Observe as

the program automatically detects the address of

the MAX9670 and starts the main program.

MAX9670 EV Kit Files

FILE DESCRIPTION

INSTALL.EXE Installs the EV kit files on your

computer

MAX9670.EXE Application program

FTD2XX.INF USB driver file

UNINST.INI Uninstalls the EV kit software

USB_Driver_Help.PDF USB driver installation help file

Evaluates: MAX9670

MAX9670 Evaluation Kit

4 _______________________________________________________________________________________

Detailed Description of Software

User Interface

The user interface (Figure 1) is easy to operate. Use the

mouse, or press the tab key to navigate with the arrow

keys. Each of the buttons correspond to bits in the

command and configuration bytes. By pressing them,

the correct I2C-compatible write operation is generated

to update the internal registers of the MAX9670. The

Interface group box indicates the current I2C-compati-

ble Device Address, Register Address Sent, and the

Data Sent/Received for the last read/write operation.

This data is used to confirm proper device operation.

The MAX9670 EV kit software splits and groups the

functions of the MAX9670 into three separate cate-

gories. TV, VCR, and Configuration functions can be

accessed by selecting the appropriate tab at the top

left of the MAX9670 EV kit software main window. The

TV and VCR tab sheets of the MAX9670 EV kit software

are again split into two sections, Video Control and

Audio Control.

The device status registers (refer to the MAX9670/

MAX9671 IC data sheet for status register information)

are displayed in the MAX9670 Status group box and

the Video Activity Status group box at the bottom right

of the main window. To read the status register, press

the Read Status button, or check the Automatic

Status Read checkbox to automatically read the status

allows the user to detect interrupts by checking the

Interrupt Enable checkbox.

Press the POR Reset button to reset the MAX9670 reg-

isters and EV kit software to their power-on-reset con-

figuration.

SHUNT

POSITION DEV_ADDR B7 B6 B5 B4 B3 B2 B1 B0 WRITE ADDRESS

(HEX)

READ ADDRESS

(HEX)

1-2* VDD 1 0 0 1 0 1 1 R/W 0x96 0x97

1-3 SCL 1 0 0 1 1 0 0 R/W 0x98 0x99

1-4 DIGGND 1 0 0 1 0 1 0 R/W 0x94 0x95

1-5 SDA 1 0 0 1 1 0 1 R/W 0x9A 0x9B

Table 1. Shunt Setting for SMBus/I2C Address (JU1)

Default position.

JUMPER SHUNT

POSITION DESCRIPTION

1-2* Connect to 1.2VRMS FS

JU2 2-3 Connect to 1.1VRMS FS

1-2* Connect to 1.2VRMS FS

JU3 2-3 Connect to 1.1VRMS FS

1-2* Connect to on-board SDA

JU4 2-3 Connect to user-supplied SDA

1-2* Connect to on-board SCL

JU5 2-3 Connect to user-supplied SCL

1-2* Connect the MAX9670’s interrupt output to the on-board MAXQ2000’s on-board interrupt input

JU6 2-3 Connect to user-supplied interrupt

1-2* Connect to on-board +3.3V supply

JU7 2-3 Connect to user-supplied +3.3V

Table 2. MAX9670 EV Kit Jumper Description (JU2–JU7)

Default position.

Evaluates: MAX9670

MAX9670 Evaluation Kit

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TV Controls (Video Control)

The Video Control group box of the MAX9670 EV kit

software (Figure 1) allows the user to reroute selected

signals to the TV SCART connector. Other functions,

such as Fast Switching and Slow Switching, can

also be changed through the Video Control group

box. Manipulate the drop-down lists to achieve the

desired result.

TV Controls (Audio Control)

The Audio Control group box of the MAX9670 EV kit

software allows the user to adjust various audio charac-

teristics of the TV output. Input Source, Volume

Control, Mute, and Zero Crossing Detector can also

be accessed from the Audio Control group box (refer

to the MAX9670/MAX9671 IC data sheet for a descrip-

tion of each of these functions).

Figure 1. MAX9670 EV Kit Software Main Window (TV Control Tab)

Evaluates: MAX9670

MAX9670 Evaluation Kit

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VCR Controls (Video Control)

The VCR tab sheet of the MAX9670 EV kit software is

shown in Figure 2. SCART output signals (VCR_Y/

CVBS_OUT and VCR_R/C_OUT), Chrominance Bias

at VCR_R/C_IN, Slow Switching, and Pulldown

VCR_R/C_OUT functions can all be accessed through

the Video Control group box.

VCR Controls (Audio Control)

Adjust the Input Source through the Audio Control

group box of the MAX9670 EV kit software.

Configuration Controls

Selecting the Configuration tab sheet (Figure 3) of the

MAX9670 EV kit software allows the user to adjust con-

figuration features of the MAX9670. Checking desired

checkboxes in the Output Enable group box enables

selected outputs of the MAX9670. The Operating

Modes group box allows the user to select one of four

power modes. When the Automatic Read checkbox is

checked, it automatically reads all registers and recon-

figures the software appropriately to the register that

was read. When in standby mode, the context of the

registers does not change to reflect the standby state.

A bias voltage can also be applied at the R/C input of

the encoder (Chrominance Bias at ENC_R/C_IN). The

EV kit software checks to see if the slave is present

every second. Checking the Disable I2C Activity

checkbox stops activity between the microcontroller

and the MAX9670 when the software is idle.

Figure 2. MAX9670 EV Kit Software Main Window (VCR Control Tab)

Evaluates: MAX9670

MAX9670 Evaluation Kit

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Advanced User Interface

There are two methods for communicating with the

MAX9670, through the normal user-interface main win-

dow or through the I2C commands available by select-

ing the Options | Interface (Advanced Users) from the

menu bar. An Advanced User Interface window pops

up with the 2-wire interface tab selected, which allows

the SMBus™/I2C-compatible protocols, such as Read

Byte and Write Byte, to be executed. The only

SMBus/I2C-compatible protocols used by the MAX9670

are:

• 1 - SMBusWriteByte(addr,cmd,data8)

• 4 - SMBusReadByte(addr,cmd) →data8

The combo and edit boxes accept numeric data in

hexadecimal and should be prefixed by 0x. See Figure

4 for an example of this tool.

Detailed Description of Hardware

The MAX9670 EV kit is an assembled and tested PCB

that demonstrates the features of the MAX9670 dual

SCART audio/video switch matrix. It routes audio, video,

and control signals between a set-top box decoder chip

and the TV and VCR SCART connectors. All video con-

nections are made through 75Ωcontrolled-impedance

traces. Connect a TV and VCR to the corresponding

SCART connectors. The set-top box decoder video con-

nections are made through the 75ΩBNC jacks with the

ENC prefix. Audio signals from the stereo audio DAC

are connected to the white and red (P4 and P5) RCA

phono jacks. Monitor the R/C inputs of the VCR connec-

tions through the VCR_R/C_IN BNC jack.

Figure 3. MAX9670 EV Kit Software Main Window (Configuration Control Tab)

SMBus is a trademark of Intel Corp.

Evaluates: MAX9670

MAX9670 Evaluation Kit

8 _______________________________________________________________________________________

Figure 4. Example of a Simple SMBusReadByte Operation Using the Advanced User Interface

Address Selection

Jumper JU1 sets the MAX9670 slave address. The

default address is 1001 011(R/W) (DEV_ADDR = VDD).

See Table 1 for a complete list of addresses.

Audio Encoder Inputs

Connect a stereo audio source that represents the

encoder audio to P4 (left audio) and P5 (right audio).

The Cirrus CS4334/5/8/9 and Burr-Brown PCM1742 are

commonly used in set-top boxes to convert a digital I2S

audio stream to analog-stereo audio signals. The full-

scale audio level of the CS4334 is 1.2VRMS, while the

full-scale audio level of the PCM1742 is 1.1VRMS. Both

parts center their audio outputs in the middle of their

analog supply voltage range.

The ENC_INL and ENC_INR inputs expect the incoming

audio signal to have a full scale of 0.5VRMS and to be

centered around ground. Therefore, the audio signals

presented to P4 and P5 are AC-coupled and attenuat-

ed by a resistor-divider network. The amount of attenua-

tion is determined by jumpers JU2 and JU3. If the shunt

position is 1-2, the resistor-divider network attenuates a

1.2VRMS full-scale audio signal to a 0.5VRMS full-scale

audio signal. If the shunt position is 2-3, the resistor-

divider network attenuates a 1.1VRMS full-scale audio

signal to a 0.5VRMS full-scale audio signal.

If the audio source does not have either a 1.2VRMS or

1.1VRMS full-scale signal, then the resistor-divider net-

work can be adjusted to accommodate another full-

scale audio level. For example, if the incoming audio

signal is 2VRMS full-scale, then the signal must be

attenuated by a factor of 4. Set the shunt positions of

JU2 and JU3 to 1-2. Change resistors R57 and R59

from a 4.53kΩresistor to a 2.2kΩresistor.

Evaluates: MAX9670

MAX9670 Evaluation Kit

_______________________________________________________________________________________ 9

Figure 5a. MAX9670 EV Kit Schematic (Sheet 1 of 2)

Evaluates: MAX9670

MAX9670 Evaluation Kit

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Figure 5b. MAX9670 EV Kit Schematic (Sheet 2 of 2)

Evaluates: MAX9670

MAX9670 Evaluation Kit

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Figure 6. MAX9670 EV Kit Component Placement Guide—Component Side

Evaluates: MAX9670

MAX9670 Evaluation Kit

12 ______________________________________________________________________________________

Figure 7. MAX9670 EV Kit Component PCB Layout—Component Side

Evaluates: MAX9670

MAX9670 Evaluation Kit

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Figure 8. MAX9670 EV Kit PCB Layout—Inner Layer 2

Evaluates: MAX9670

MAX9670 Evaluation Kit

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Figure 9. MAX9670 EV Kit PCB Layout—Inner Layer 3

Evaluates: MAX9670

MAX9670 Evaluation Kit

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Figure 10. MAX9670 EV Kit PCB Layout—Solder Side

Evaluates: MAX9670

MAX9670 Evaluation Kit

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.

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

Figure 11. MAX9670 EV Kit Component Placement Guide—Solder Side

Mouser Electronics

Authorized Distributor

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MAX9670EVKIT+