MAX14830 datasheet(4/15 Pages) MAXIM

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SHUNT

POSITION

U1-1 (SPI/I2C)

CONNECTED TO

OPERATING

MODE

Not installed*

+3.3V

(through resistor R11)

SPI

Installed

GND

I2C

SHUNT

POSITION

U12-1 (IN) CONNECTED TO

SPI/I2C HEADER, PIN 5 (CSN)

CONNECTED TO

CSN SERVING

1-2*

+3.3V

U1, pin 5 (CS/A0)

(through jumper JU19)

UART

2-3

GND

U4–U7, pin 6 (CS)

IO links

Not installed

SPI/I2C header, pin 11 (CSN_SEL)

CSN connection selected by

CSN_SEL

Determined by CSN_SEL

JUMPER*

SIGNAL/POWER

LED

JU3

IOLINK0 C/Q

JU4

IOLINK0 DI

JU5

IOLINK1 C/Q

JU6

IOLINK1 DI

JU7

IOLINK2 C/Q

JU8

IOLINK2 DI

D10

JU9

IOLINK3 C/Q

D11

JU10

IOLINK3 DI

D12

SHUNT

POSITION

U2-4 AND U3-4 (INA)

CONNECTED TO

OUTPUT

INTERFACE

Not installed*

GND

(through resistor R12)

IO link

Installed

+3.3V

RS-485/RS-232

MAX14830 Evaluation Kit

Evaluates: MAX14830

Detailed Description of Hardware

The MAX14830 EV kit provides a proven design to

evaluate the MAX14830 IC. The IC is an advanced quad-

channel UART with each UART containing 128 words of

receive and transmit FIFO buffer that can be controlled

through SPI or I2C. Each of the four UARTs is selected

through SPI or I2C in-band addressing.

Each of the four UARTs can interface with an IO-Link

master transceiver or an RS-485/RS-232 multiprotocol

transceiver. The EV kit contains four on-board IO-Link

master transceivers, four RS-485/RS-232 multiprotocol

transceivers, and 8-channel DPDT switches to select

between the IO link and RS-485/RS-232 transceivers.

Jumper Selection

SPI/I2C Operating Mode (SPI/I2C)

Jumper JU1 selects the IC’s operating mode. The operat-

ing mode is selectable between SPI and I2C. See Table

2 for JU1 shunt positions.

IO Link and RS-485/RS-232

Output Interface Selection (INA)

Jumper JU2 selects the IC’s output interface. The output

interface is selectable between the IO link and RS-485/

RS-232 transceivers. See Table 3 for JU2 shunt positions.

IO-Link Signal Indicators ((C/Q)/(DI))

Jumpers JU3–JU10 connect or disconnect the IO-Link

signal (C/Q)/(DI) from their respective LED indicators.

Install shunts to connect or remove shunts to disconnect

the IO-Link signal from their respective LED indicators.

Table 4 lists the correspondence between jumpers

JU3–JU10 to their respective IO-Link signal and LED

indicators.

UART and IO-Link

Chip-Select Signal (CSN)

Jumper JU11 selects the destination for the CSN (chip-

select signal on the SPI/I2C header, pin 5). The CSN

chip-select signal can be set to serve either the UART

(MAX14830) or the four IO links (MAX14824) using JU11.

See Table 5 for JU11 shunt positions.

*Default position.

*Install shunts to connect or remove (default) shunts to

disconnect from LED.

*Default position.

Table 2. JU1 Jumper Selection (SPI/I2C)

Table 5. JU11 Jumper Selection (CSN)

Table 4. JU3–JU10 Jumper Legend (LEDs)

Table 3. JU2 Jumper Selection (INA)

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