Datasheet

DESIGNATION QTY DESCRIPTION
C1 1
1FF Q10%, 10V X7R ceramic
capacitor (0603)
TDK C1608X7R1A105K
C2 1
0.1FF Q10%, 16V X7R ceramic
capacitor (0603)
Murata GRM188R71C104KA01D
J1 1 6-pin right-angle male header
J2 1
2-position terminal block
On-Shore Technology
ED500/2DS
DESIGNATION QTY DESCRIPTION
JP1 1 2-pin straight male header
R1–R4 4
150I Q5% resistors (0603)
R5 1
120I Q5% resistor (1206)
U1 1
40Mbps, +3.3V, RS-485 half-
duplex transceiver (8 SO)
Maxim MAX14840EASA+
— 1 Shorting jumper
— 1 PCB: EPCB14840EPM1
SUPPLIER PHONE WEBSITE
Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com
On-Shore Technology, Inc. 480-921-3000 www.on-shore.com
TDK Corp. 847-803-6100 www.component.tdk.com
PIN SIGNAL DESCRIPTION
1
RE
Receiver-enable input. This active-low
pin enables the half-duplex receiver.
2 DI
Driver input. This pin carries the transmit
data from the Pmod system’s UART
transmitter to a connected receiver.
3 RO
Receiver output. This pin carries the
half-duplex receive data to the Pmod
system’s UART receiver.
4 DE
Driver-output-enable input. This active-
high pin enables the half-duplex
transmitter.
5 GND Ground
6 VCC Power supply
PIN SIGNAL DESCRIPTION
1 RS485-A Noninverting RS-485 signal
2 RS485-B Inverting RS-485 signal
_________________________________________________________________ Maxim Integrated Products 2
MAX14840PMB1 Peripheral Module
Component List
Component Suppliers
Note: Indicate that you are using the MAX14840PMB1 when contacting these component suppliers.
Detailed Description
UART Interface
The MAX14840PMB1 peripheral module can interface
to the host by plugging directly into a Pmod-compatible
port (configured for UART ) through connector J1.
Connector J1 provides connection of the module to the
Pmod host through an interface similar to the Pmod
UART Type 4 standard recommended by Digilent. The
transmit driver and receive pin assignment are the same
as the standard. However, the CTS and RTS signals
are replaced by half-duplex driver- and receiver-enable
signals. See Table 1.
Connector J2 provides the RS-485 positive and negative
signal pair. See Table 2.
Table 1. Connector J1 (UART Communication)
Table 2. Connector J2