EDE300 Datasheet PDF - Unspecified

EDE300 View Datasheet(PDF) - Unspecified

Part Name

Description

Manufacturer

EDE300

Unspecified

EDE300 Datasheet PDF : 9 Pages

1 2 3 4 5 6 7 8 9

Clock/ Power Pins:

OSC1,OSC2 (PIN 16,PIN 15):

Power (PIN 14,PIN 4):

Ground (PIN 5):

4 MHz Resonator Connection

Connect to +5 VDC

Connect to 0 VDC (GND)

LOCAL CONTROL MODE

In Local Control Mode, enabled by wiring the Mode pin low (Pin 3), directional control is

selected by the condition of the Dir/Latch pin (Pin 1). When Local Control Mode is selected and the

Dir/Latch pin is low, the EDE300 acts as a Parallel to Serial transmitter, continually reading the 8 data

pins (D0..D7) and sending this value out the serial XMIT pin (Pin 18). When Local Control Mode is

selected and the Dir/Latch pin is high, the EDE300 acts as a Serial to Parallel receiver, continually

monitoring the RCV pin (Pin 17) and latching the received data onto the 8 data pins (D0..D7).

NOTE: Switching the Dir/Latch pin causes the data I/O pins (D0..D7) to switch from inputs to outputs

and vice-versa. Care should be taken that data is not input into the 8 data pins while the EDE300 is

in Serial to Parallel mode (Pin 17 high); otherwise damage may occur to the EDE300 or the external

circuitry as both attempt to drive the I/O pins. See the Host Control Mode section's schematics for

details on switching the data inputs and outputs with the EDE300. The following schematics depict

the EDE300 in a basic, unidirectional hookup, transmitting (Figure One) and receiving (Figure Two)

data to and from a PC via the PC serial port COM 1.

Figure One: Unidirectional Serial Transmission to PC

The following code, written in ‘Turbo C’, illustrates the reception of the EDE300’s data stream. It can

be used in conjunction with the hardware setup in Figure One.

#include <stdio.h>

char data;

main()

/* 8 BIT VARIABLE TO HOLD INCOMING DATA */

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