Echelon Series 6000 Chip databook User Manual

Page 56

Notes:

All parameters assume nominal supply voltage (V

DD3

= 3.3 V) and operating temperature

between –40 ºC and +85 ºC), unless otherwise noted.

Applies to RST~ and SVC~ pins only.

Communications Port (CP) Pins for the Neuron
6000 Processor

The Neuron 6000 Processor has a very versatile communications port. It consists of five pins

(named CP0 through CP4) that can be configured to interface to a wide variety of media

interfaces (network transceivers) and operates over a wide range of data rates.
The communications port can be configured to operate in one of two modes: single-ended

mode or special-purpose mode. Table 17 lists the pin assignments for the communications

port pins for each of the modes, and Figure 15 shows a block diagram of the communications

port.

Table 17. Communications Port Pin Assignments

Pin

Drive

Current

Single-Ended Mode

(3.3 V)

Special-Purpose

Mode

(3.3 V)

Connect To

CP0 N/A

Data input

Rx input

Transceiver RXD

CP1 8 mA

Data output

Tx output

Transceiver TXD

CP2 8 mA

Transmit Enable

output

Bit Clock output

Transmit Enable

(single ended mode)
Bit Clock

(special-purpose mode)

CP3 N/A

Do Not Connect

CP4 8 mA

Collision Detect input

Frame Clock output

Collision Detect

(single ended mode)
Frame Clock

(special-purpose mode)

Before programming, a Neuron 6000 Processor uses its default communications parameters,

which define a simplified single-ended mode 78 kbps channel. The default communications

parameters allow you to load an application image over a 78 kbps network, for example

during device manufacturing. Devices that use a 78 kbps transceiver (such as a 78 kbps

EIA-485 transceiver or an LPT-11 Link Power Transceiver) can use the default

communications parameters within development or manufacturing test networks. For

production networks (networks with many devices), you should ensure that each device has

communications parameters defined for the channel; use the IzoT NodeBuilder Development

Tool to develop applications with the correct communications parameters. Note that devices

defined for a TP/XF-1250 channel cannot use the default communications parameters; each

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