A - Human Necessities – 63 – F
Patent
A - Human Necessities
63
F
A63F 13/12 (2006.01) A63F 13/08 (2006.01)
Patent
CA 2377620
A system controls access to a plurality of devices with only four lines by grouping the devices in nodes, wherein each node includes a local control circuit and a predetermined number of the devices, with each local control circuit defining a shift register, the positions of which are respectively connected to the devices. The nodes are connected in series with a host controller, so that the shift registers of the several nodes cooperate to form a system shift register. The nodes are serially addressed by a serial data message from a DATA OUT line of the host controller, which message includes MxN data bits followed by strobe indicator, where N is the number of nodes and M is the number of devices at each node. All controllers are connected to a V+ line and a COMMON line and a RETURN line. The system register forms a fourth line, one end of which is connected to the host controller DATA OUT terminal and the other end of which may be connected to the RETURN line.
Gail Theodore
Mattice Harold
Wilder Richard
Fetherstonhaugh & Co.
Igt
International Game Technology
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