Echelon FT 3150 Smart Transceiver - Manual (Page 9)

FT 3120/FT 3150 Smart Transceiver Data Book 3
Product Overview
Table 1.1 FT Smart Transceiver Product Offerings
The FT Smart Transceivers provide 11 I/O pins which may be configured to operate in one or more of 34 predefined
standard input/output modes. Combining a wide range of I/O models with two on-board timer/counters enables the
FT Smart Transceivers to interface to application circuits with minimal external logic or software development.
The FT Smart Transceivers can be easily interfaced to other host MCUs by way of the Echelon ShortStack™ or MIP
firmware. When used with the ShortStack or MIP firmware, the FT Smart Transceiver enables any OEM product with
a host microcontroller to quickly and inexpensively become a networked, Internet-accessible device. The ShortStack
firmware uses an SCI or SPI serial interface to communicate between the host and the FT Smart Transceiver. The
MIP firmware uses a high performance parallel or dual-ported RAM interface.
The FT Smart Transceivers are supplied with either an FT-X1or FT-X2 transformer, the patent-pending external
communication transformers. A transformer enables operation in the presence of high frequency common mode noise
on unshielded twisted pair networks. Properly designed devices can meet the rigorous Level 3 requirements of EN
61000-4-6 without the need for a network isolation choke.
The transformer also offers outstanding immunity from magnetic field noise, eliminating the need for protective
magnetic field shields in most applications. The transformer is provided in a potted, 6-pin, through-hole plastic
package.
A typical FT Smart Transceiver-based device requires a power source, crystal, and I/O circuitry. See Figure 1.1 for a
typical FT Smart Transceiver-based device.
The FT Smart Transceivers are compatible withthe Echelon LPT-10 Link Power Transceiver, and they can
communicate with each other on a single twisted pair cable. This capability provides an inexpensive means of
interfacing to devices whose current or voltage requirements would otherwise exceed the capacity of the link power
segment. When equipped with an FT Smart Transceiver and DC blocking capacitors, these devices can be operated
from a local power supply without the need for additional electrical isolation from the link power network.
Figure 1.1 Typical FT Smart Transceiver-based Device
Smart
Transceiver IC
Product
Number
Model
Number
Maximum
input clock
EEPROM
(Kbytes)
RAM
(Kbytes)
ROM
(Kbytes)
External
memory
interface
IC
Package
FT 3120-E4S40 14212R-500 40MHz 4Kbytes 2Kbytes 12Kbytes No 32 SOIC
FT 3120-E4P40 14222R-800 40MHz 4Kbytes 2Kbytes 12Kbytes No 44 TQFP
FT 3150-P20 14230R-450 20MHz 0.5Kbytes 2Kbytes N/A Yes 64 TQFP
L ON W ORKS Device
Sense or Control
Devices, e.g., Motors,
Valves, Encoders,
Lights, Relays,
Switches
Communication
Transformer
FT-X1 or FT-X2
Power
Source
Crystal
Smart Transceiver IC I/O
Data
Rate
of
78
kbps
Free Topology Twisted Pair Network