Pushbuttons; Communication; Bacc Denomination Lamps - Aristocrat USA MAV500/MKVI Service Manual

I/O Driver Board

11.2.3 Pushbuttons

This includes all pushbutton lamps and pushbutton switches. The lamps used are
rated at 28 V DC and are driven from OC current sinking drivers. The 24 V DC
pushbutton switch signals are converted to TTL levels before being input.
Sixteen pushbutton lamp outputs are provided. All lamp outputs, including light
tower lamps and animation lamps, include warm-up resistors to reduce inrush current
in the case where several lamps are illuminated simultaneously.
Similarly, sixteen pushbutton switch inputs are provided. All pushbutton switch
inputs are initially at 24 V DC; hence voltage dividers are used to convert these
voltage levels into TTL levels. These inputs are filtered to reduce noise on the
signals.

11.2.4 Communication

The extended I/O driver board design provides four serial ports, labelled COM4 to
COM7. Serial Ports COM0 to COM3 are provided on the Main Board.
COM4 is allocated to the Mikohn Interface.
COM5 is an RS-232 compatible port, with RTS and CTS to be used as hardware
handshake or as general input or output pins.
COM6 and COM7 are modem-compatible ports with full handshaking.

11.2.5 BACC Denomination Lamps

The Extended I/O Driver Board has eight lamp or LED outputs which can be used to
indicate the BACC denomination.
Lamp Data Bit
1 to 7 D0.. D6
8 D7
11-10
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and it may not be copied. All rights reserved. © Copyright (ATI) Aristocrat Technologies, Inc. 2002.
Table 11-3 BACC Denomination Lamps
Label
BACCLIT1..7 Available Bill Values - Denomination Lamps
BACCLIT1 = Highest denomination LED
BACCLIT7 = Lowest denomination LED
BACCLIT8 "Insert Bill" Lamp
USA MAV500/MKVI Service Manual
Function
28-00486-00