Sanyo EP93F manual Carnet

CARNET

Automotive LAN

CARNET is a LAN that uses the ARCNET token passing bus method.

It can achieve a high transmission speed of 7.5 Mbps.

Since noise can be minimized by installing

this LAN in vehicles, such installation has

Features

Hub function supporting connection of up to 8 nodes

Construction of LAN with high transmission speed of 7.5 Mbps yet ultra low noise possible

Twisted pair cables can be used Easy to use due to compact size

A 7.5 Mbps automotive LAN can be configured by combining the LA2330W with a protocol IC for CARNET (ARCNET controller TMC20040C Series).

On-chip driver/receiver for The audio equipment control bus

On-chip driver/receiver for CAN

Includes 8 non-inverted type open-collector output comparator circuits

Features

The audio equipment control bus block, CAN block bus output withstand voltage of 18 V

Vehicle signal detection block input withstand voltage of 18 V

Each block is independent (incl. power supply and GND line), and each is provided with a standby function.

Functions

Transceiver block for CARNET

(1)Transmitter (D/A converter (3-bit), LPF (for EMI prevention), output driver)

(2)Receiver (attenuator, receiving amplifier, noise elimination LPF (for reception signal), comparator (for waveform shaping)

Driver/receiver block for The audio equipment control bus

(1)Transmitter (output driver)

(2)Receiver (receiving amplifier, hysteresis comparator (for waveform shaping) Driver/receiver block for CAN

(1)Transmitter (LPF (for EMI prevention), output driver)

(2)Receiver (attenuator, comparator)

Non-inverted type open-collector output comparator

1-chip IC incorporating an The audio equipment control bus transceiver and comparator

Features

The audio equipment control bus output withstand voltage of 18 V

Vehicle signal detection block input withstand voltage of 18V

Functions

Driver/receiver block for The audio equipment control bus

(1)Transmitter (output driver)

(2)Receiver (receiving amplifier, hysteresis comparator (for waveform shaping)) Non-inverted type open collector output comparator

LA2351M Transceiver for CARNET

The LA2351M is a low-noise transceiver IC for automotive LANs.

Features

Support of either 3-bit digital or staircase signals as input signal

If a 3-bit digital signal cannot be routed as an EMI countermeasure, place an R-2R ladder in the vicinity of the protocol chip and route the signal following D/A conversion, connecting it to the LPF input.

A 5-Mbps or 7.5 Mbps automotive LAN can be constructed by combining the LA2351M with a protocol IC for automotive LAN (ARCNET controller TMC20040C Series).

On-chip adjustment LPF

Low-noise data communication is possible.

Functions

Transmitter (transmit) block

1)D/A converter (3-bit)

2)LPF (for EMI prevention)

3)Output driver

Receiver (receive) block

1)Receiving amplifier

2)Noise elimination LPF (for reception signal)

3)Comparator (for waveform shaping)