FENIX IMVICO SM2000 OPERATION MANUAL
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34
Printer
DK_status
ND
35
Printer
+5V
ND
36
Host Sys.
nSelectIn
1284-Active
*NC: Not connected ND: Not defined
Table 2.3-
Connector IEEE 1284-B pin assignment
NOTES:
(1)
The ‘n’ prefix used before a signal name means that they are active in ‘0’ logic level. If the host
system does not provide any of the signal lines mentioned above, both communication types could
fail.
(2)
It is recommended to use twisted pair cables (signal/ground), with the return sides connected to the
system signal ground level.
(3)
Do not ignore the nACK and BUSY signals during data transmissions. An attempt to transmit data
without nACK or BUSY control signals might cause lost data.
(4)
The interface cables should have the minimum required possible length (maximum recommended
length: 2 m).
Fig. 2.6-
SM2000 IEEE 1284-B connector.
The male connector that must be used with the SM2000 is a standard CENTRONICS or compatible.
2.5- USB INTERFACE
The SM2000 USB interface has the following general features:
•
USB specification
USB 1.1 (12MHz full speed)
•
Transfer type
Bulk
•
Maximum receive/transmit endpoint size
64 bytes
•
Current consumption from USB bus
2mA max.
2.5.1- Assignments of USB connector terminals USB
Pin
Signal name
1
Vbus
2
D –
3
D+
4
GND
Fig. 2.7-
SM2000 USB connector.
User has to use a standard “B” series USB connector.
Pin #36
Pin #18
Pin #1
Pin #19
Pin nº4
Pin nº1
Pin nº3
Pin nº2