Vend 1
(pin 1)
Idle Start
Bit
0
Bit
1
Bit 2
Bit 3
Bit 4
Bit 5
Bit 6
Bit
7
Stop Idle
3.3
ms
0 0 1 0 1 0 0 0 =
20dec
Figure 6 - Typical Serial Output: Transmission of the value 20 (decimal),
Note not recognized
6.6 SMILEY
®
SECURE PROTOCOL - SSP
NOTE: Please refer to the Smiley
®
Secure Protocol (SSP) Specification (ITL Drawing
GA138) 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. This
mode is selectable regardless of which extended interface is programmed into the
validator. (DIPswitch 2 is non functional in this mode).
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 (like) - open collector driver
•
High Speed 9600 Baud Rate
•
16 bit CRC error checking
•
Data Transfer Mode
NV10 Operations Manual
18
Copyright Innovative Technology Ltd 2008 GA333-5
