A member of the Olancha Group Ltd
Registered in England No. 08405712
VAT Registration No. GB163 04 0349
Siretta Ltd
Basingstoke Road
Spencers Wood
Reading
Berkshire RG7 1PW
sales
fax
email
web
+44(0)118 976 9014
+44(0)118 976 9020
www.siretta.co.uk
23
ZETA Series
GPRS/UMTS/LTE Terminal with GPIO
USB Serial Port Interface
Figure 16.
ZETA USB Connector
A mini USB type B connector is provided for USB serial connection. ESD
protection to +/-4KV contact discharge and +/-8KV air discharge is provided. Pins
on this connector are shown in
table 6
below.
Table 6.
Mini USB Connectors
Pin
Name
Direction
Description
Low Level Nominal
High Level
1
VBUS
Input
USB Power VBUS
4.75V
5V
5.25V
2
D-
Differential
Data Minus
4.75V
5V
5.25V
3
D+
Differential
Data Plus
4.75V
5V
5.25V
4
-
-
-
-
-
-
5
GND
Input
Signal Ground
-
0V
-
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