NV9 Operations Manual GA326-4
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© Copyright Innovative Technology Limited 2005
7.5 Smiley® Secure Protocol - SSP
Note:
Please refer to the Smiley
®
Secure Protocol (SSP) Specification ITL Drawing GA 138 on the web site
for full details of the SSP protocol.
To use SSP mode DIPswitch 3 must be set up and DIPswitch 4 must be set down.
SSP is a secure serial interface specifically designed to address the problems experienced by cash handling
systems in gaming machines. Problems such as acceptor swapping, reprogramming acceptors and line
tapping are all addressed. This interface is recommended for all new designs.
The interface uses a master slave model, the host machine is the master and the peripherals (note acceptor,
coin acceptor or coin hopper) are the slaves.
Data transfer is over a multi-drop bus using clock asynchronous serial transmission with simple open collector
drivers. The integrity of data transfers is ensured through the use of 16 bit CRC checksums on all packets.
Each SSP device of a particular type has a unique serial number; this number is used to validate each device
in the direction of credit transfer before transactions can take place.
Commands are currently provided for coin acceptors, note acceptors and coin hoppers. All current features
of these devices are supported.
Features:
•
Serial control of Note / Coin Validators and Hoppers
•
4 wire (Tx, Rx, +V, Gnd) system
•
RS232 (TTL) - open collector driver
•
High Speed 9600 Baud Rate
•
16 bit CRC error checking
•
Data Transfer Mode
Benefits:
•
Proven in the field
•
Simple and low cost interfacing of transaction peripherals.
•
High security control of payout peripherals.
•
Defence against surrogate validator fraud.
•
Straightforward integration into host machines.
•
Remote programming of transaction peripherals
•
Open standard for universal use.
For detailed information and full protocol specification please refer to SSP Specification ITL Drawing GA 138,
this is available from the ITL website
www.innovative-technology.co.uk
To help in the software
implementation of the SSP, ITL can provide sample C Code, DLL controls and Visual Basic applications on
request. Please contact
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