EDE1400 查看數據表（PDF） - Unspecified
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EDE1400 Datasheet PDF : 7 Pages
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PIN DEFINITIONS
Printer Connection Pins
STROBE (Pin 1): ................................................... Printer STROBE Line;
pin 1 on parallel printer cable
BUSY (Pin 18): ..................................................... Printer BUSY Line;
pin 11 on parallel printer cable
D0 (Pin 6): ........................................................... Printer Data 0 Line;
pin 2 on parallel printer cable
D1 (Pin 7): ........................................................... Printer Data 1 Line;
pin 3 on parallel printer cable
D2 (Pin 8): ........................................................... Printer Data 2 Line;
pin 4 on parallel printer cable
D3 (Pin 9): ........................................................... Printer Data 3 Line;
pin 5 on parallel printer cable
D4 (Pin 10): ......................................................... Printer Data 4 Line;
pin 6 on parallel printer cable
D5 (Pin 11): ......................................................... Printer Data 5 Line;
pin 7 on parallel printer cable
D6 (Pin 12): ......................................................... Printer Data 6 Line;
pin 8 on parallel printer cable
D7 (Pin 13): ......................................................... Printer Data 7 Line;
pin 9 on parallel printer cable
GND (Pin 5):........................................................ Printer Ground Line;
pin 18 on parallel printer cable
EDE700 Control & Data Pins
Serial Input (Pin 2): .............................................. Serial Data Input
Flow Control (Pin 17):.......................................... Hardware Handshaking (Only for PC interfacing)
Clock/ Power Pins
OSC1,OSC2 (Pin 16, Pin 15):............................... 4 MHz Resonator Connections
+5V Power (Pin 14, Pin 4, Pin 3): ....................... Connect to +5V DC
GND (Pin 5):........................................................ Connect to 0 VDC (GND)
OVERVIEW OF USE
Operation of the EDE1400 is fairly straightforward. Text to be printed is sent serially at 2400 Baud to
the EDE1400. The EDE1400 takes care of the entire printer interface protocol. For instance, printing
the text "Hello World!" on your printer via the EDE1400 is done by sending the ASCII string 'Hello
World' at 2400 Baud, no parity, 8 data bits, and one stop bit (N-8-1, the most popular serial format
for RS-232). The text is not actually printed on the printer until the Carriage Return character ($0D
Hex, 13 Decimal) is sent. In addition, the Line Feed character ($0A Hex, 10 Decimal) needs to be
sent after each line of text to cause the printer to advance one row.
The EDE1400 requires a 4MHz resonator or crystal to operate, as illustrated in the schematic in
Figure One. Serial data coming from a stamp of microcontroller can be connected directly to the
Copyright © 1997 E-Lab Digital Engineering, Inc. All Rights Reserved. Page 2
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