Display Board Interface; Digital Input Signals; Digital Output Signals - Bayer HealthCare RapidPoint 400 Series Service Manual

Display Board Interface

Digital Input Signals

Input Signal
LPT1ERROR
LPT1PE
LPT1BUSY
LPT1ACK-
LPT1SLCT

Digital Output Signals

Output Signal
LCD_ENAB
LCD_DIM
LCD_DU0..7
LCD_DL0..7
LCD_YD/VSYNC
LCD_/HSYNC
LCD_XCK/CK
ENAVEE
ENAVDD
LPT1DB<0..7>
LPT1STB
LPT1INIT-
SPKR
COM1TX
COM1CTS-
Rev. C
Description
Printer error. Possible error sources are print head
temperature out of range, print head voltage out of range,
print head in the up position, or printer out of paper.
Printer is out of paper.
Printer is currently busy and cannot accept any new data at
this time.
Signal asserted when LPT1BUSY is becoming de-asserted.
Printer is online.
Description
Enables operation of the LCD.
Turns the LCD backlight inverter on and off.
Upper byte of LCD data signals.
Lower byte of LCD data signals.
LCD frame start signal.
LCD line start signal.
LCD clock signal.
LCD negative supply control signal.
LCD positive supply control signal.
Centronics-type parallel port data bus.
Indicates valid data on LPT1DB<0..7>.
Initializes the printer control circuitry.
Speaker input signal.
Transmit signal for the touch screen serial port to the Display
board from the Main board.
Clear to send signal for the touch screen serial port.
Electronic System Overview 97