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DC Power Input
The DC power input connector connects to the AC adapter or auto adapter to power the Tablet PC. The DC power
input connector is a two-conductor connector with a center pin and sleeve. Pin assignments for this connector are
given in Table 4-2.
Conductor
Center Pin
16 Volts DC ±10%, 3.75 A
Sleeve
Ground
When a DC power source is connected to the DC power input on the Tablet PC, circuitry built into the Tablet PC
provides protection against reverse polarity and overvoltage.
Universal Serial Bus Port
The Tablet PC and Tablet Dock provide Universal
Serial Bus (USB) ports that are compliant with the
Universal Serial Bus Specification Revision 1.1. A USB
port is a powered USB hub and can support
concurrent operation of up to 127 devices.
The Stylistic ST4000 Tablet PC provides two USB
ports, and functions as a USB host. The system
supports high-power, bus-powered functions as
defined in the USB specification. System resources for
the USB are assigned by the operating system, no
software configuration is necessary; however, it may
be necessary to install drivers and application
software to support your USB device. The Stylistic
ST4000 Tablet Dock provides three USB ports.
Contact Pin Locations
Position 3
Position 4
Table 4-2. DC Power Input Connector Pin Assignments
Description
Table 4-3. USB Port Contacts
Contact
Number
1
Position 2
Position 1
2
3
4
Comments
(Hosiden part number HEC3900-01-010)
This connector is a EIAJ-RC5320A standard
connector. See "DC Power Input Connector Pin
Assignments" on page 34 for more details.
Ensure that your USB configuration does not exceed
the individual port maximum load on the total
system load. Note that the conductor gauge and
length of your USB cabling will affect the voltage
drop and signal propagation between USB devices.
Refer to the Universal Serial Bus Specification for
details on cable requirements or contact your cable
vendor (see "Related Documentation" on page vi.)
Also note that some USB devices are self-powered
and do not draw power over the USB cable. Contact
pin assignments for the USB port are shown in the
table below.
Signal Name
Signal Description
5V
Cable power (+ 5 volts DC,
500mA)
DATA -
Data
DATA +
Data
GND
Cable ground
DC Power Input
4
4
34
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