Copyright Innovative Technology Ltd 2008 GA794-2
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5.5 SERIAL INPUT/OUTPUT – SIO
To use Serial Input/Output mode The SIO interface must be programmed into the
validator via the Configuration Cards (See Appendix D – Configuration Cards) or via the ITL
BNV Currency Manager Program.
Serial Input/Output (SIO) is a simple serial protocol compatible with the same interface on
NV4 to NV10. It is not recommended for use on new designs due to the possibility of noise
effecting the communication. We recommend the use of a serial protocol with error
checking such as SSP. The BV20 does not support the Simple Serial Data Out Only mode
as available on the NV4 and earlier models.
Connections:
Pin
Name
Type
Description
1
Vend 1
Output
Serial Data Out (Tx)
2
Vend 2
Output
Not Used
3
Vend 3
Output
Not Used
4
Vend 4
Output
Not Used
5
Inhibit 1
Input
Serial Data In (Rx)
6
Inhibit 2
Input
Not Used
7
Inhibit 3
Input
Not Used
8
Inhibit 4
Input
Not Used
9 Busy
Output Not
Used
10 Escrow Input Not
Used
11
Do not connect
12
Do not connect
13
Do not connect
14
Factory use only
Factory use only
Factory use only
Factory use only
Do not connect
15
+Vin Power
Nominal 12V DC
supply
16 0V Ground
0V
supply
Table 10
- SIO Mode Pin Description
The Baud rate of communications can be set at either 300 or 9600 using the Validator
Manager Software. The data format according to the Baud rate used is shown in
Table 11 - SIO Data Format.
Baud Rate
Start Bits
Data Bits
Stop Bits
300 1 8 2
9600 1 8 1
Table 11
- SIO Data Format
BV20 Operations Manual 20
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