SCHILLER AT-2plus 6-Channel ECG Unit
SERVICE HANDBOOK Issue d May 2002
Page 8.5
Chapter 8
Glossary
Acronyms
LCD KONT LCD contrast - sets the -18 V voltage level (from which the LCD
backlight power is generated) and thus the contrast of the screen.
LD1,2,3,4 Lower LCD data.
LDS Lower data strobe.
LOE Lower output enable.
LP Line synchronisation.
LSRAM Lower output enable - control signal for static RAM.
LWE Lower write enable.
M LCD control signal derived from FLM.
MCLK Motor clock - speed control for the printer motor.
MOD Control signal from the battery charging circuit.
MOFF Motor off.
MON Motor ON - printer motor enable signal.
NWTZ Mains supply.
NMI Non-maskable interrupt - interrupt for U47 (Schiller gate array)
activated by the reset button.
OFF Off signal from the OFF key to switch off the power supply.
PDS Control signal derived from FLM (unity waveform 1/2 FLM
frequency).
PM Paper mark signal.
PMARK Paper mard detection signal.
PMPON Pacemaker detection pulse.
PMNEG Pacemaker negative - indicates the trailing edge of a pacemaker pulse.
PMPOS Pacemaker positive - indicates the leading edge of a pacemaker pulse.
QTRRG QRS trigger - output signal.
RA Right arm.
RAS Row address strobe.
RES\p Error reset signal to inactivate the LCD.
RTS Ready to send - outgoing serial data, handshake with CTS.
RXD Receive data - incoming serial data.
R / W Read / Write
RES Reset.
RESLCD/ Resets / darkens the LCD.
SC(0..8) System control bus - CPU control signals
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